diff --git a/cppu/qa/cppumaker/test_cppumaker.cxx b/cppu/qa/cppumaker/test_cppumaker.cxx
index 22e0b81e19b6..7d611ab10a52 100644
--- a/cppu/qa/cppumaker/test_cppumaker.cxx
+++ b/cppu/qa/cppumaker/test_cppumaker.cxx
@@ -474,8 +474,7 @@ void Test::testBigStruct() {
 
 void Test::testPolyStruct() {
     CPPUNIT_ASSERT_EQUAL(
-        OUString(
-                "test.codemaker.cppumaker.Struct<char,short>"),
+        u"test.codemaker.cppumaker.Struct<char,short>"_ustr,
         (css::uno::Any(
             test::codemaker::cppumaker::Struct< sal_Unicode, sal_Int16 >()).
          getValueType().getTypeName()));
@@ -494,7 +493,7 @@ void Test::testExceptions() {
         aEmptySequence;
 
     test::codemaker::cppumaker::TestException1 e11(
-        "abc", nullptr, 1,
+        u"abc"_ustr, nullptr, 1,
         css::uno::Any(123.0),
         test::codemaker::cppumaker::HelperEnum_ONE,
         test::codemaker::cppumaker::Struct<sal_Int32, sal_Int32>(5, aEmptySequence), 2);
@@ -504,7 +503,7 @@ void Test::testExceptions() {
     e13 = e11;
     CPPUNIT_ASSERT_EQUAL(e11, e13);
     test::codemaker::cppumaker::TestException2 e21(
-        "abc", nullptr, 1,
+        u"abc"_ustr, nullptr, 1,
         css::uno::Any(123.0),
         test::codemaker::cppumaker::HelperEnum_ONE,
         test::codemaker::cppumaker::Struct<sal_Int32, sal_Int32>(5, aEmptySequence), 2);
diff --git a/cppu/qa/test_any.cxx b/cppu/qa/test_any.cxx
index 757040314844..9b54462a5fd2 100644
--- a/cppu/qa/test_any.cxx
+++ b/cppu/qa/test_any.cxx
@@ -284,9 +284,9 @@ void Test::testVoid() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -393,9 +393,9 @@ void Test::testBoolean() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -504,9 +504,9 @@ void Test::testByte() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -615,9 +615,9 @@ void Test::testShort() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -728,9 +728,9 @@ void Test::testUnsignedShort() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -839,9 +839,9 @@ void Test::testLong() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -950,9 +950,9 @@ void Test::testUnsignedLong() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1061,9 +1061,9 @@ void Test::testHyper() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1172,9 +1172,9 @@ void Test::testUnsignedHyper() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1283,9 +1283,9 @@ void Test::testFloat() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1394,9 +1394,9 @@ void Test::testDouble() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1506,9 +1506,9 @@ void Test::testChar() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'1', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1553,7 +1553,7 @@ void Test::testChar() {
 }
 
 void Test::testString() {
-    css::uno::Any a(OUString("1"));
+    css::uno::Any a(u"1"_ustr);
     CPPUNIT_ASSERT(bool(a.getValueType() == cppu::UnoType<OUString>::get()));
     {
         bool b = true;
@@ -1617,9 +1617,9 @@ void Test::testString() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", (a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("1"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"1"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1728,9 +1728,9 @@ void Test::testType() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1840,9 +1840,9 @@ void Test::testSequence() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -1970,9 +1970,9 @@ void Test::testEnum() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -2086,9 +2086,9 @@ void Test::testStruct() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -2154,7 +2154,7 @@ void Test::testStruct() {
 void Test::testPoly() {
     css::uno::Any a;
     a <<= Poly< css::uno::Sequence< ::sal_Unicode > >();
-    CPPUNIT_ASSERT_EQUAL_MESSAGE( "type name", OUString("Poly<[]char>"), a.getValueType().getTypeName() );
+    CPPUNIT_ASSERT_EQUAL_MESSAGE( "type name", u"Poly<[]char>"_ustr, a.getValueType().getTypeName() );
     CPPUNIT_ASSERT_EQUAL_MESSAGE(
         "constructor",
         css::uno::Any(Poly< css::uno::Sequence< ::sal_Unicode > >()), a);
@@ -2228,9 +2228,9 @@ void Test::testException() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -2364,9 +2364,9 @@ void Test::testInterface() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
@@ -2496,9 +2496,9 @@ void Test::testNull() {
         CPPUNIT_ASSERT_EQUAL_MESSAGE("sal_Unicode", u'2', b);
     }
     {
-        OUString b("2");
+        OUString b(u"2"_ustr);
         CPPUNIT_ASSERT_MESSAGE( "OUString", !(a >>= b) );
-        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", OUString("2"), b );
+        CPPUNIT_ASSERT_EQUAL_MESSAGE( "OUString", u"2"_ustr, b );
     }
     {
         css::uno::Type b(cppu::UnoType<OUString>::get());
diff --git a/cppu/qa/test_unotype.cxx b/cppu/qa/test_unotype.cxx
index 829676a14d74..56a5937729d1 100644
--- a/cppu/qa/test_unotype.cxx
+++ b/cppu/qa/test_unotype.cxx
@@ -101,67 +101,67 @@ void Test::testUnoType() {
     css::uno::Type t;
     t = cppu::UnoType<cppu::UnoVoidType>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_VOID, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("void"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"void"_ustr, t.getTypeName());
     CPPUNIT_ASSERT(bool(cppu::UnoType<void>::get() == t));
     t = cppu::UnoType<bool>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_BOOLEAN, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("boolean"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"boolean"_ustr, t.getTypeName());
     CPPUNIT_ASSERT(bool(cppu::UnoType<sal_Bool>::get() == t));
     t = cppu::UnoType<sal_Int8>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_BYTE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("byte"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"byte"_ustr, t.getTypeName());
     t = cppu::UnoType<sal_Int16>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SHORT, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("short"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"short"_ustr, t.getTypeName());
     t = cppu::UnoType<cppu::UnoUnsignedShortType>::get();
     CPPUNIT_ASSERT_EQUAL(
         css::uno::TypeClass_UNSIGNED_SHORT, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("unsigned short"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"unsigned short"_ustr, t.getTypeName());
     t = cppu::UnoType<sal_Int32>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_LONG, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("long"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"long"_ustr, t.getTypeName());
     t = cppu::UnoType<sal_uInt32>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_UNSIGNED_LONG, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("unsigned long"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"unsigned long"_ustr, t.getTypeName());
     t = cppu::UnoType<sal_Int64>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_HYPER, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("hyper"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"hyper"_ustr, t.getTypeName());
     t = cppu::UnoType<sal_uInt64>::get();
     CPPUNIT_ASSERT_EQUAL(
         css::uno::TypeClass_UNSIGNED_HYPER, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("unsigned hyper"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"unsigned hyper"_ustr, t.getTypeName());
     t = cppu::UnoType<float>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_FLOAT, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("float"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"float"_ustr, t.getTypeName());
     t = cppu::UnoType<double>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_DOUBLE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("double"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"double"_ustr, t.getTypeName());
     t = cppu::UnoType<cppu::UnoCharType>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_CHAR, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("char"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"char"_ustr, t.getTypeName());
     t = cppu::UnoType<OUString>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_STRING, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("string"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"string"_ustr, t.getTypeName());
     t = cppu::UnoType<css::uno::Type>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_TYPE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("type"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"type"_ustr, t.getTypeName());
     t = cppu::UnoType<css::uno::Any>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_ANY, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("any"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"any"_ustr, t.getTypeName());
     t = cppu::UnoType<cppu::UnoSequenceType<sal_Int8>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[]byte"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[]byte"_ustr, t.getTypeName());
     CPPUNIT_ASSERT(bool(cppu::UnoType<css::uno::Sequence<sal_Int8>>::get() == t));
     t = cppu::UnoType<cppu::UnoSequenceType<cppu::UnoUnsignedShortType>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[]unsigned short"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[]unsigned short"_ustr, t.getTypeName());
     t = cppu::UnoType<cppu::UnoSequenceType<cppu::UnoCharType>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[]char"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[]char"_ustr, t.getTypeName());
     t = cppu::UnoType<
         cppu::UnoSequenceType<cppu::UnoSequenceType<sal_Int8>>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[][]byte"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[][]byte"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(
         cppu::UnoType<css::uno::Sequence<css::uno::Sequence<sal_Int8>>>::get(),
         t);
@@ -169,43 +169,43 @@ void Test::testUnoType() {
         cppu::UnoSequenceType<
             cppu::UnoSequenceType<cppu::UnoUnsignedShortType>>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[][]unsigned short"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[][]unsigned short"_ustr, t.getTypeName());
     t = cppu::UnoType<
         cppu::UnoSequenceType<cppu::UnoSequenceType<cppu::UnoCharType>>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_SEQUENCE, t.getTypeClass());
-    CPPUNIT_ASSERT_EQUAL(OUString("[][]char"), t.getTypeName());
+    CPPUNIT_ASSERT_EQUAL(u"[][]char"_ustr, t.getTypeName());
     t = cppu::UnoType<css::uno::TypeClass>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_ENUM, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.uno.TypeClass"), t.getTypeName());
+        u"com.sun.star.uno.TypeClass"_ustr, t.getTypeName());
     t = cppu::UnoType<css::lang::EventObject>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_STRUCT, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.lang.EventObject"), t.getTypeName());
+        u"com.sun.star.lang.EventObject"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(cppu::UnoType<DerivedStruct1>::get(), t);
     t = cppu::UnoType<css::beans::PropertyChangeEvent>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_STRUCT, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.beans.PropertyChangeEvent"), t.getTypeName());
+        u"com.sun.star.beans.PropertyChangeEvent"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(cppu::UnoType<DerivedStruct2>::get(), t);
     t = cppu::UnoType<css::beans::Optional<sal_Int8>>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_STRUCT, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.beans.Optional<byte>"), t.getTypeName());
+        u"com.sun.star.beans.Optional<byte>"_ustr, t.getTypeName());
     t = cppu::UnoType<css::uno::Exception>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_EXCEPTION, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.uno.Exception"), t.getTypeName());
+        u"com.sun.star.uno.Exception"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(cppu::UnoType<DerivedException1>::get(), t);
     t = cppu::UnoType<css::uno::RuntimeException>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_EXCEPTION, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.uno.RuntimeException"), t.getTypeName());
+        u"com.sun.star.uno.RuntimeException"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(cppu::UnoType<DerivedException2>::get(), t);
     t = cppu::UnoType<css::uno::XInterface>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_INTERFACE, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.uno.XInterface"), t.getTypeName());
+        u"com.sun.star.uno.XInterface"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(
         cppu::UnoType<css::uno::Reference<css::uno::XInterface>>::get(), t);
     CPPUNIT_ASSERT_EQUAL(cppu::UnoType<DerivedInterface1>::get(), t);
@@ -214,7 +214,7 @@ void Test::testUnoType() {
     t = cppu::UnoType<css::uno::XComponentContext>::get();
     CPPUNIT_ASSERT_EQUAL(css::uno::TypeClass_INTERFACE, t.getTypeClass());
     CPPUNIT_ASSERT_EQUAL(
-        OUString("com.sun.star.uno.XComponentContext"), t.getTypeName());
+        u"com.sun.star.uno.XComponentContext"_ustr, t.getTypeName());
     CPPUNIT_ASSERT_EQUAL(
         cppu::UnoType<css::uno::Reference<css::uno::XComponentContext>>::get(),
         t);
diff --git a/cppu/qa/typelib.cxx b/cppu/qa/typelib.cxx
index 227e5731cc4f..a5d59812f04d 100644
--- a/cppu/qa/typelib.cxx
+++ b/cppu/qa/typelib.cxx
@@ -59,9 +59,9 @@ public:
         CPPUNIT_ASSERT_EQUAL(sal_Int32(0), t->nDefaultEnumValue);
         CPPUNIT_ASSERT_EQUAL(sal_Int32(3), t->nEnumValues);
         CPPUNIT_ASSERT(t->ppEnumNames != nullptr);
-        CPPUNIT_ASSERT_EQUAL(OUString("METHOD"), OUString::unacquired(&t->ppEnumNames[0]));
-        CPPUNIT_ASSERT_EQUAL(OUString("PROPERTY"), OUString::unacquired(&t->ppEnumNames[1]));
-        CPPUNIT_ASSERT_EQUAL(OUString("UNKNOWN"), OUString::unacquired(&t->ppEnumNames[2]));
+        CPPUNIT_ASSERT_EQUAL(u"METHOD"_ustr, OUString::unacquired(&t->ppEnumNames[0]));
+        CPPUNIT_ASSERT_EQUAL(u"PROPERTY"_ustr, OUString::unacquired(&t->ppEnumNames[1]));
+        CPPUNIT_ASSERT_EQUAL(u"UNKNOWN"_ustr, OUString::unacquired(&t->ppEnumNames[2]));
         CPPUNIT_ASSERT(t->pEnumValues != nullptr);
         CPPUNIT_ASSERT_EQUAL(sal_Int32(0), t->pEnumValues[0]);
         CPPUNIT_ASSERT_EQUAL(sal_Int32(1), t->pEnumValues[1]);
@@ -110,10 +110,10 @@ public:
         CPPUNIT_ASSERT_EQUAL(t2, css::uno::Type(t->aBase.ppTypeRefs[1]));
         CPPUNIT_ASSERT_EQUAL(t3, css::uno::Type(t->aBase.ppTypeRefs[2]));
         CPPUNIT_ASSERT(t->aBase.ppMemberNames != nullptr);
-        CPPUNIT_ASSERT_EQUAL(OUString("Finish"), OUString::unacquired(&t->aBase.ppMemberNames[0]));
-        CPPUNIT_ASSERT_EQUAL(OUString("ErrorMessage"),
+        CPPUNIT_ASSERT_EQUAL(u"Finish"_ustr, OUString::unacquired(&t->aBase.ppMemberNames[0]));
+        CPPUNIT_ASSERT_EQUAL(u"ErrorMessage"_ustr,
                              OUString::unacquired(&t->aBase.ppMemberNames[1]));
-        CPPUNIT_ASSERT_EQUAL(OUString("Return"), OUString::unacquired(&t->aBase.ppMemberNames[2]));
+        CPPUNIT_ASSERT_EQUAL(u"Return"_ustr, OUString::unacquired(&t->aBase.ppMemberNames[2]));
         CPPUNIT_ASSERT(t->pParameterizedTypes == nullptr);
         // `offsets` and `typerefs` must still be valid:
         CPPUNIT_ASSERT_EQUAL(t->aBase.pMemberOffsets[0], offsets[0]);
@@ -164,9 +164,8 @@ public:
         CPPUNIT_ASSERT_EQUAL(t1, css::uno::Type(t->aBase.ppTypeRefs[0]));
         CPPUNIT_ASSERT_EQUAL(t2, css::uno::Type(t->aBase.ppTypeRefs[1]));
         CPPUNIT_ASSERT(t->aBase.ppMemberNames != nullptr);
-        CPPUNIT_ASSERT_EQUAL(OUString("IsPresent"),
-                             OUString::unacquired(&t->aBase.ppMemberNames[0]));
-        CPPUNIT_ASSERT_EQUAL(OUString("Value"), OUString::unacquired(&t->aBase.ppMemberNames[1]));
+        CPPUNIT_ASSERT_EQUAL(u"IsPresent"_ustr, OUString::unacquired(&t->aBase.ppMemberNames[0]));
+        CPPUNIT_ASSERT_EQUAL(u"Value"_ustr, OUString::unacquired(&t->aBase.ppMemberNames[1]));
         CPPUNIT_ASSERT(t->pParameterizedTypes != nullptr);
         CPPUNIT_ASSERT_EQUAL(param[0], t->pParameterizedTypes[0]);
         CPPUNIT_ASSERT_EQUAL(param[1], t->pParameterizedTypes[1]);
diff --git a/cppu/source/threadpool/current.cxx b/cppu/source/threadpool/current.cxx
index 46fdc8c253f3..aefd85f3d1b0 100644
--- a/cppu/source/threadpool/current.cxx
+++ b/cppu/source/threadpool/current.cxx
@@ -40,10 +40,10 @@ namespace cppu
 static typelib_InterfaceTypeDescription * get_type_XCurrentContext()
 {
     static typelib_InterfaceTypeDescription* s_type_XCurrentContext = []() {
-        OUString sTypeName("com.sun.star.uno.XCurrentContext");
+        OUString sTypeName(u"com.sun.star.uno.XCurrentContext"_ustr);
         typelib_InterfaceTypeDescription* pTD = nullptr;
         typelib_TypeDescriptionReference* pMembers[1] = { nullptr };
-        OUString sMethodName0("com.sun.star.uno.XCurrentContext::getValueByName");
+        OUString sMethodName0(u"com.sun.star.uno.XCurrentContext::getValueByName"_ustr);
         typelib_typedescriptionreference_new(&pMembers[0], typelib_TypeClass_INTERFACE_METHOD,
                                              sMethodName0.pData);
         typelib_typedescription_newInterface(
@@ -55,17 +55,17 @@ static typelib_InterfaceTypeDescription * get_type_XCurrentContext()
 
         typelib_InterfaceMethodTypeDescription* pMethod = nullptr;
         typelib_Parameter_Init aParameters[1];
-        OUString sParamName0("Name");
-        OUString sParamType0("string");
+        OUString sParamName0(u"Name"_ustr);
+        OUString sParamType0(u"string"_ustr);
         aParameters[0].pParamName = sParamName0.pData;
         aParameters[0].eTypeClass = typelib_TypeClass_STRING;
         aParameters[0].pTypeName = sParamType0.pData;
         aParameters[0].bIn = true;
         aParameters[0].bOut = false;
         rtl_uString* pExceptions[1];
-        OUString sExceptionName0("com.sun.star.uno.RuntimeException");
+        OUString sExceptionName0(u"com.sun.star.uno.RuntimeException"_ustr);
         pExceptions[0] = sExceptionName0.pData;
-        OUString sReturnType0("any");
+        OUString sReturnType0(u"any"_ustr);
         typelib_typedescription_newInterfaceMethod(&pMethod, 3, false, sMethodName0.pData,
                                                    typelib_TypeClass_ANY, sReturnType0.pData, 1,
                                                    aParameters, 1, pExceptions);
diff --git a/cppu/source/typelib/static_types.cxx b/cppu/source/typelib/static_types.cxx
index bd6580d2591d..67b63550e1cd 100644
--- a/cppu/source/typelib/static_types.cxx
+++ b/cppu/source/typelib/static_types.cxx
@@ -132,7 +132,7 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                 // type
                 if (! s_aTypes[typelib_TypeClass_TYPE])
                 {
-                    OUString sTypeName("type");
+                    OUString sTypeName(u"type"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &s_aTypes[typelib_TypeClass_TYPE], typelib_TypeClass_TYPE, sTypeName.pData );
                     // another static ref:
@@ -141,7 +141,7 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                 // any
                 if (! s_aTypes[typelib_TypeClass_ANY])
                 {
-                    OUString sTypeName("any");
+                    OUString sTypeName(u"any"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &s_aTypes[typelib_TypeClass_ANY], typelib_TypeClass_ANY, sTypeName.pData );
                     // another static ref:
@@ -150,7 +150,7 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                 // string
                 if (! s_aTypes[typelib_TypeClass_STRING])
                 {
-                    OUString sTypeName("string");
+                    OUString sTypeName(u"string"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &s_aTypes[typelib_TypeClass_STRING], typelib_TypeClass_STRING, sTypeName.pData );
                     // another static ref:
@@ -159,18 +159,18 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                 // XInterface
                 if (! s_aTypes[typelib_TypeClass_INTERFACE])
                 {
-                    OUString sTypeName("com.sun.star.uno.XInterface");
+                    OUString sTypeName(u"com.sun.star.uno.XInterface"_ustr);
 
                     typelib_InterfaceTypeDescription * pTD = nullptr;
 
                     typelib_TypeDescriptionReference * pMembers[3] = { nullptr,nullptr,nullptr };
-                    OUString sMethodName0("com.sun.star.uno.XInterface::queryInterface");
+                    OUString sMethodName0(u"com.sun.star.uno.XInterface::queryInterface"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &pMembers[0], typelib_TypeClass_INTERFACE_METHOD, sMethodName0.pData );
-                    OUString sMethodName1("com.sun.star.uno.XInterface::acquire");
+                    OUString sMethodName1(u"com.sun.star.uno.XInterface::acquire"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &pMembers[1], typelib_TypeClass_INTERFACE_METHOD, sMethodName1.pData );
-                    OUString sMethodName2("com.sun.star.uno.XInterface::release");
+                    OUString sMethodName2(u"com.sun.star.uno.XInterface::release"_ustr);
                     ::typelib_typedescriptionreference_new(
                         &pMembers[2], typelib_TypeClass_INTERFACE_METHOD, sMethodName2.pData );
 
@@ -192,16 +192,16 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                     assert( ! s_aTypes[typelib_TypeClass_EXCEPTION] );
                     {
                     typelib_TypeDescription * pTD1 = nullptr;
-                    OUString sTypeName1("com.sun.star.uno.Exception");
+                    OUString sTypeName1(u"com.sun.star.uno.Exception"_ustr);
 
                     typelib_CompoundMember_Init aMembers[2];
-                    OUString sMemberType0("string");
-                    OUString sMemberName0("Message");
+                    OUString sMemberType0(u"string"_ustr);
+                    OUString sMemberName0(u"Message"_ustr);
                     aMembers[0].eTypeClass = typelib_TypeClass_STRING;
                     aMembers[0].pTypeName = sMemberType0.pData;
                     aMembers[0].pMemberName = sMemberName0.pData;
-                    OUString sMemberType1("com.sun.star.uno.XInterface");
-                    OUString sMemberName1("Context");
+                    OUString sMemberType1(u"com.sun.star.uno.XInterface"_ustr);
+                    OUString sMemberName1(u"Context"_ustr);
                     aMembers[1].eTypeClass = typelib_TypeClass_INTERFACE;
                     aMembers[1].pTypeName = sMemberType1.pData;
                     aMembers[1].pMemberName = sMemberName1.pData;
@@ -215,7 +215,7 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                     // another static ref:
                     ++s_aTypes[typelib_TypeClass_EXCEPTION]->nStaticRefCount;
                     // RuntimeException
-                    OUString sTypeName2("com.sun.star.uno.RuntimeException");
+                    OUString sTypeName2(u"com.sun.star.uno.RuntimeException"_ustr);
                     ::typelib_typedescription_new(
                         &pTD1, typelib_TypeClass_EXCEPTION, sTypeName2.pData, s_aTypes[typelib_TypeClass_EXCEPTION], 0, nullptr );
                     ::typelib_typedescription_register( &pTD1 );
@@ -224,24 +224,24 @@ typelib_TypeDescriptionReference ** SAL_CALL typelib_static_type_getByTypeClass(
                     // XInterface members
                     typelib_InterfaceMethodTypeDescription * pMethod = nullptr;
                     typelib_Parameter_Init aParameters[1];
-                    OUString sParamName0("aType");
-                    OUString sParamType0("type");
+                    OUString sParamName0(u"aType"_ustr);
+                    OUString sParamType0(u"type"_ustr);
                     aParameters[0].pParamName = sParamName0.pData;
                     aParameters[0].eTypeClass = typelib_TypeClass_TYPE;
                     aParameters[0].pTypeName = sParamType0.pData;
                     aParameters[0].bIn = true;
                     aParameters[0].bOut = false;
                     rtl_uString * pExceptions[1];
-                    OUString sExceptionName0("com.sun.star.uno.RuntimeException");
+                    OUString sExceptionName0(u"com.sun.star.uno.RuntimeException"_ustr);
                     pExceptions[0] = sExceptionName0.pData;
-                    OUString sReturnType0("any");
+                    OUString sReturnType0(u"any"_ustr);
                     typelib_typedescription_newInterfaceMethod(
                         &pMethod, 0, false, sMethodName0.pData,
                         typelib_TypeClass_ANY, sReturnType0.pData,
                         1, aParameters, 1, pExceptions );
                     ::typelib_typedescription_register( reinterpret_cast<typelib_TypeDescription**>(&pMethod) );
 
-                    OUString sReturnType1("void");
+                    OUString sReturnType1(u"void"_ustr);
                     ::typelib_typedescription_newInterfaceMethod(
                         &pMethod, 1, true, sMethodName1.pData,
                         typelib_TypeClass_VOID, sReturnType1.pData, 0, nullptr, 0, nullptr );
diff --git a/cppu/source/typelib/typelib.cxx b/cppu/source/typelib/typelib.cxx
index e665b2b4273e..2b646a6dbf74 100644
--- a/cppu/source/typelib/typelib.cxx
+++ b/cppu/source/typelib/typelib.cxx
@@ -1879,35 +1879,35 @@ extern "C" void SAL_CALL typelib_typedescription_getByName(
             bInited = true;
 
             typelib_TypeDescription * pType = nullptr;
-            typelib_typedescription_new( &pType, typelib_TypeClass_TYPE, OUString("type").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_TYPE, u"type"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_VOID, OUString("void").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_VOID, u"void"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_BOOLEAN, OUString("boolean").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_BOOLEAN, u"boolean"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_CHAR, OUString("char").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_CHAR, u"char"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_BYTE, OUString("byte").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_BYTE, u"byte"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_STRING, OUString("string").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_STRING, u"string"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_SHORT, OUString("short").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_SHORT, u"short"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_SHORT, OUString("unsigned short").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_SHORT, u"unsigned short"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_LONG, OUString("long").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_LONG, u"long"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_LONG, OUString("unsigned long").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_LONG, u"unsigned long"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_HYPER, OUString("hyper").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_HYPER, u"hyper"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_HYPER, OUString("unsigned hyper").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_UNSIGNED_HYPER, u"unsigned hyper"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_FLOAT, OUString("float").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_FLOAT, u"float"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_DOUBLE, OUString("double").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_DOUBLE, u"double"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
-            typelib_typedescription_new( &pType, typelib_TypeClass_ANY, OUString("any").pData, nullptr, 0, nullptr );
+            typelib_typedescription_new( &pType, typelib_TypeClass_ANY, u"any"_ustr.pData, nullptr, 0, nullptr );
             typelib_typedescription_register( &pType );
             typelib_typedescription_release( pType );
         }
diff --git a/cppu/source/uno/EnvStack.cxx b/cppu/source/uno/EnvStack.cxx
index 34fea77f46bd..7b7df2cefc5a 100644
--- a/cppu/source/uno/EnvStack.cxx
+++ b/cppu/source/uno/EnvStack.cxx
@@ -135,7 +135,7 @@ extern "C" void SAL_CALL uno_getCurrentEnvironment(uno_Environment ** ppEnv, rtl
         }
         else
         {
-            OUString uno_envDcp(UNO_LB_UNO);
+            OUString uno_envDcp(u"" UNO_LB_UNO ""_ustr);
             uno_getEnvironment(ppEnv, uno_envDcp.pData, nullptr);
         }
     }
diff --git a/cppu/source/uno/cascade_mapping.cxx b/cppu/source/uno/cascade_mapping.cxx
index f03d88e529d6..17b190032e52 100644
--- a/cppu/source/uno/cascade_mapping.cxx
+++ b/cppu/source/uno/cascade_mapping.cxx
@@ -208,7 +208,7 @@ void getCascadeMapping(uno_Mapping     ** ppMapping,
     if (pAddPurpose && pAddPurpose->length)
         return;
 
-    OUString uno_envType(UNO_LB_UNO);
+    OUString uno_envType(u"" UNO_LB_UNO ""_ustr);
 
     OUString from_envType    = cppu::EnvDcp::getTypeName(pFrom->pTypeName);
     OUString to_envType      = cppu::EnvDcp::getTypeName(pTo->pTypeName);
diff --git a/cppu/source/uno/lbenv.cxx b/cppu/source/uno/lbenv.cxx
index 472feae34b4e..d9b37b083e02 100644
--- a/cppu/source/uno/lbenv.cxx
+++ b/cppu/source/uno/lbenv.cxx
@@ -1032,7 +1032,7 @@ bool loadEnv(OUString const  & cLibStem,
     }
 
 
-    uno_initEnvironmentFunc fpInit = reinterpret_cast<uno_initEnvironmentFunc>(aMod.getSymbol(UNO_INIT_ENVIRONMENT));
+    uno_initEnvironmentFunc fpInit = reinterpret_cast<uno_initEnvironmentFunc>(aMod.getSymbol(u"" UNO_INIT_ENVIRONMENT ""_ustr));
 
     if (!fpInit)
         return false;
diff --git a/cppu/source/uno/lbmap.cxx b/cppu/source/uno/lbmap.cxx
index 04e4c28eee4c..aea90a7eb760 100644
--- a/cppu/source/uno/lbmap.cxx
+++ b/cppu/source/uno/lbmap.cxx
@@ -448,7 +448,7 @@ static Mapping loadExternalMapping(
         if (bModule)
         {
             uno_ext_getMappingFunc fpGetMapFunc =
-                reinterpret_cast<uno_ext_getMappingFunc>(aModule.getSymbol( UNO_EXT_GETMAPPING ));
+                reinterpret_cast<uno_ext_getMappingFunc>(aModule.getSymbol( u"" UNO_EXT_GETMAPPING ""_ustr ));
 
             if (fpGetMapFunc)
             {
@@ -518,7 +518,7 @@ static Mapping getMediateMapping(
     // backwards: from dest to source of mapping chain
 
     // connect to uno
-    OUString aUnoEnvTypeName( UNO_LB_UNO );
+    OUString aUnoEnvTypeName( u"" UNO_LB_UNO ""_ustr );
     if (rTo.getTypeName() == aUnoEnvTypeName) // to is uno
     {
         aUno = rTo;
diff --git a/cppuhelper/qa/misc/test_misc.cxx b/cppuhelper/qa/misc/test_misc.cxx
index 0e4fdf9efb42..d4e45ab0da66 100644
--- a/cppuhelper/qa/misc/test_misc.cxx
+++ b/cppuhelper/qa/misc/test_misc.cxx
@@ -32,7 +32,7 @@ void Test::testCatchThrow()
     css::uno::Any aSavedException;
     try
     {
-        throw css::uno::RuntimeException("RuntimeException");
+        throw css::uno::RuntimeException(u"RuntimeException"_ustr);
     }
     catch (const css::uno::RuntimeException&)
     {
@@ -60,7 +60,7 @@ void Test::testgetCaughtException()
         aSavedException; /// exception caught during unzipping is saved to be thrown during reading
     try
     {
-        throw css::uno::RuntimeException("RuntimeException");
+        throw css::uno::RuntimeException(u"RuntimeException"_ustr);
     }
     catch (...)
     {
diff --git a/cppuhelper/source/access_control.cxx b/cppuhelper/source/access_control.cxx
index 9b8b907df6b6..09001b7fda0e 100644
--- a/cppuhelper/source/access_control.cxx
+++ b/cppuhelper/source/access_control.cxx
@@ -38,7 +38,7 @@ AccessControl::AccessControl( Reference< XComponentContext > const & xContext )
 {
     if (! (xContext->getValueByName( ACCESS_CONTROLLER_SINGLETON ) >>= m_xController))
     {
-        throw SecurityException( "no access controller!" );
+        throw SecurityException( u"no access controller!"_ustr );
     }
 }
 
@@ -48,7 +48,7 @@ AccessControl::AccessControl(
 {
     if (! m_xController.is())
     {
-        throw SecurityException( "no access controller!" );
+        throw SecurityException( u"no access controller!"_ustr );
     }
 }
 
@@ -57,7 +57,7 @@ AccessControl::AccessControl( AccessControl const & ac )
 {
     if (! m_xController.is())
     {
-        throw SecurityException( "no access controller!" );
+        throw SecurityException( u"no access controller!"_ustr );
     }
 }
 
diff --git a/cppuhelper/source/bootstrap.cxx b/cppuhelper/source/bootstrap.cxx
index bd975460f06c..a6387c1ff1aa 100644
--- a/cppuhelper/source/bootstrap.cxx
+++ b/cppuhelper/source/bootstrap.cxx
@@ -90,7 +90,7 @@ Reference< XComponentContext > SAL_CALL bootstrap()
         auto* p1 = cppuhelper_detail_findSofficePath();
         if (p1 == nullptr) {
             throw BootstrapException(
-                "no soffice installation found!");
+                u"no soffice installation found!"_ustr);
         }
         OUString p2;
 #if defined(_WIN32)
@@ -106,7 +106,7 @@ Reference< XComponentContext > SAL_CALL bootstrap()
         if (!bOk)
         {
             throw BootstrapException(
-                "bad characters in soffice installation path!");
+                u"bad characters in soffice installation path!"_ustr);
         }
 #endif
         OUString path;
@@ -114,16 +114,16 @@ Reference< XComponentContext > SAL_CALL bootstrap()
             osl::FileBase::E_None)
         {
             throw BootstrapException(
-                "cannot convert soffice installation path to URL!");
+                u"cannot convert soffice installation path to URL!"_ustr);
         }
         if (!path.isEmpty() && !path.endsWith("/")) {
             path += "/";
         }
 
         OUString uri;
-        if (!Bootstrap::get("URE_BOOTSTRAP", uri)) {
+        if (!Bootstrap::get(u"URE_BOOTSTRAP"_ustr, uri)) {
             Bootstrap::set(
-                "URE_BOOTSTRAP",
+                u"URE_BOOTSTRAP"_ustr,
                 Bootstrap::encode(
                     path +
 #if defined MACOSX
@@ -136,16 +136,16 @@ Reference< XComponentContext > SAL_CALL bootstrap()
         Reference< XComponentContext > xLocalContext(
             defaultBootstrap_InitialComponentContext() );
         if ( !xLocalContext.is() )
-            throw BootstrapException( "no local component context!" );
+            throw BootstrapException( u"no local component context!"_ustr );
 
         // create a random pipe name
         rtlRandomPool hPool = rtl_random_createPool();
         if ( hPool == nullptr )
-            throw BootstrapException( "cannot create random pool!" );
+            throw BootstrapException( u"cannot create random pool!"_ustr );
         sal_uInt8 bytes[ 16 ];
         if ( rtl_random_getBytes( hPool, bytes, std::size( bytes ) )
             != rtl_Random_E_None )
-            throw BootstrapException( "random pool error!" );
+            throw BootstrapException( u"random pool error!"_ustr );
         rtl_random_destroyPool( hPool );
         OUStringBuffer buf("uno");
         for (unsigned char byte : bytes)
@@ -154,10 +154,10 @@ Reference< XComponentContext > SAL_CALL bootstrap()
 
         // arguments
         OUString args [] = {
-            OUString("--nologo"),
-            OUString("--nodefault"),
-            OUString("--norestore"),
-            OUString("--nolockcheck"),
+            u"--nologo"_ustr,
+            u"--nodefault"_ustr,
+            u"--norestore"_ustr,
+            u"--nolockcheck"_ustr,
             OUString("--accept=pipe,name=" + sPipeName + ";urp;")
         };
         rtl_uString * ar_args [] = {
@@ -184,16 +184,16 @@ Reference< XComponentContext > SAL_CALL bootstrap()
                 osl_freeProcessHandle( hProcess );
                 break;
             case osl_Process_E_NotFound:
-                throw BootstrapException( "image not found!" );
+                throw BootstrapException( u"image not found!"_ustr );
             case osl_Process_E_TimedOut:
-                throw BootstrapException( "timeout occurred!" );
+                throw BootstrapException( u"timeout occurred!"_ustr );
             case osl_Process_E_NoPermission:
-                throw BootstrapException( "permission denied!" );
+                throw BootstrapException( u"permission denied!"_ustr );
             case osl_Process_E_Unknown:
-                throw BootstrapException( "unknown error!" );
+                throw BootstrapException( u"unknown error!"_ustr );
             case osl_Process_E_InvalidError:
             default:
-                throw BootstrapException( "unmapped error!" );
+                throw BootstrapException( u"unmapped error!"_ustr );
         }
 
         // create a URL resolver
diff --git a/cppuhelper/source/component_context.cxx b/cppuhelper/source/component_context.cxx
index 47dbd0b3773e..893e484be44d 100644
--- a/cppuhelper/source/component_context.cxx
+++ b/cppuhelper/source/component_context.cxx
@@ -380,7 +380,7 @@ Reference< lang::XMultiComponentFactory > ComponentContext::getServiceManager()
     if ( !m_xSMgr.is() )
     {
         throw DeploymentException(
-            "null component context service manager",
+            u"null component context service manager"_ustr,
             static_cast<OWeakObject *>(this) );
     }
     return m_xSMgr;
@@ -446,7 +446,7 @@ void ComponentContext::disposing(std::unique_lock<std::mutex>& rGuard)
     uno_Environment ** envs;
     sal_Int32 envCount;
     uno_getRegisteredEnvironments(
-        &envs, &envCount, &rtl_allocateMemory, OUString("java").pData);
+        &envs, &envCount, &rtl_allocateMemory, u"java"_ustr.pData);
     assert(envCount >= 0);
     assert(envCount == 0 || envs != nullptr);
     if (envs) {
@@ -502,7 +502,7 @@ ComponentContext::ComponentContext(
         // create new smgr based on delegate's one
         m_xSMgr.set(
             xMgr->createInstanceWithContext(
-                "com.sun.star.comp.stoc.OServiceManagerWrapper", xDelegate ),
+                u"com.sun.star.comp.stoc.OServiceManagerWrapper"_ustr, xDelegate ),
             UNO_QUERY );
         // patch DefaultContext property of new one
         Reference< beans::XPropertySet > xProps( m_xSMgr, UNO_QUERY );
@@ -510,7 +510,7 @@ ComponentContext::ComponentContext(
         if (xProps.is())
         {
             Reference< XComponentContext > xThis( this );
-            xProps->setPropertyValue( "DefaultContext", Any( xThis ) );
+            xProps->setPropertyValue( u"DefaultContext"_ustr, Any( xThis ) );
         }
     }
     catch (...)
diff --git a/cppuhelper/source/defaultbootstrap.cxx b/cppuhelper/source/defaultbootstrap.cxx
index 6e80c9697158..ca70a91d3f57 100644
--- a/cppuhelper/source/defaultbootstrap.cxx
+++ b/cppuhelper/source/defaultbootstrap.cxx
@@ -54,25 +54,25 @@ cppu::defaultBootstrap_InitialComponentContext(OUString const & iniUri)
     }
     rtl::Reference smgr(
         new cppuhelper::ServiceManager);
-    smgr->init(getBootstrapVariable(bs, "UNO_SERVICES"));
+    smgr->init(getBootstrapVariable(bs, u"UNO_SERVICES"_ustr));
     rtl::Reference tmgr(new cppuhelper::TypeManager);
-    tmgr->init(getBootstrapVariable(bs, "UNO_TYPES"));
+    tmgr->init(getBootstrapVariable(bs, u"UNO_TYPES"_ustr));
     std::vector< cppu::ContextEntry_Init > context_values
     {
         cppu::ContextEntry_Init(
-            "/singletons/com.sun.star.lang.theServiceManager",
+            u"/singletons/com.sun.star.lang.theServiceManager"_ustr,
             css::uno::Any(
                 css::uno::Reference< css::uno::XInterface >(
                     static_cast< cppu::OWeakObject * >(smgr.get()))),
             false),
         cppu::ContextEntry_Init(
-            "/singletons/com.sun.star.reflection.theTypeDescriptionManager",
+            u"/singletons/com.sun.star.reflection.theTypeDescriptionManager"_ustr,
             css::uno::Any(
                 css::uno::Reference< css::uno::XInterface >(
                     static_cast< cppu::OWeakObject * >(tmgr.get()))),
             false),
         cppu::ContextEntry_Init( //TODO: from services.rdb?
-            "/singletons/com.sun.star.util.theMacroExpander",
+            u"/singletons/com.sun.star.util.theMacroExpander"_ustr,
             css::uno::Any(
                 cppuhelper::detail::create_bootstrap_macro_expander_factory()),
             true)
@@ -80,13 +80,13 @@ cppu::defaultBootstrap_InitialComponentContext(OUString const & iniUri)
     smgr->addSingletonContextEntries(&context_values);
     context_values.push_back(
         cppu::ContextEntry_Init(
-            "/services/com.sun.star.security.AccessController/mode",
-            css::uno::Any(OUString("off")), false));
+            u"/services/com.sun.star.security.AccessController/mode"_ustr,
+            css::uno::Any(u"off"_ustr), false));
     context_values.push_back(
         cppu::ContextEntry_Init(
-            "/singletons/com.sun.star.security.theAccessController",
+            u"/singletons/com.sun.star.security.theAccessController"_ustr,
             css::uno::Any(
-                OUString("com.sun.star.security.AccessController")),
+                u"com.sun.star.security.AccessController"_ustr),
             true));
     css::uno::Reference< css::uno::XComponentContext > context(
         createComponentContext(context_values.data(), context_values.size()));
diff --git a/cppuhelper/source/exc_thrower.cxx b/cppuhelper/source/exc_thrower.cxx
index 50d3133ffb2b..eec416775038 100644
--- a/cppuhelper/source/exc_thrower.cxx
+++ b/cppuhelper/source/exc_thrower.cxx
@@ -115,7 +115,7 @@ void ExceptionThrower_dispatch(
     default:
     {
         OSL_ASSERT( false );
-        RuntimeException exc( "not implemented!" );
+        RuntimeException exc( u"not implemented!"_ustr );
         uno_type_any_construct(
             *ppException, &exc, cppu::UnoType<decltype(exc)>::get().getTypeLibType(), nullptr );
         break;
@@ -227,18 +227,18 @@ void SAL_CALL throwException( Any const & exc )
     if (exc.getValueTypeClass() != TypeClass_EXCEPTION)
     {
         throw RuntimeException(
-            "no UNO exception given "
-            "(must be derived from com::sun::star::uno::Exception)!" );
+            u"no UNO exception given "
+            "(must be derived from com::sun::star::uno::Exception)!"_ustr );
     }
 
 #if RETHROW_FAKE_EXCEPTIONS
     lo_mobile_throwException(exc);
 #else
-    Mapping uno2cpp(Environment(UNO_LB_UNO), Environment::getCurrent());
+    Mapping uno2cpp(Environment(u"" UNO_LB_UNO ""_ustr), Environment::getCurrent());
     if (! uno2cpp.is())
     {
         throw RuntimeException(
-            "cannot get binary UNO to C++ mapping!" );
+            u"cannot get binary UNO to C++ mapping!"_ustr );
     }
 
     Reference< XExceptionThrower > xThrower;
@@ -258,17 +258,17 @@ Any SAL_CALL getCaughtException()
 #if defined(ANDROID) || defined(EMSCRIPTEN)
     return Any();
 #else
-    Mapping cpp2uno(Environment::getCurrent(), Environment(UNO_LB_UNO));
+    Mapping cpp2uno(Environment::getCurrent(), Environment(u"" UNO_LB_UNO ""_ustr));
     if (! cpp2uno.is())
     {
         throw RuntimeException(
-            "cannot get C++ to binary UNO mapping!" );
+            u"cannot get C++ to binary UNO mapping!"_ustr );
     }
-    Mapping uno2cpp(Environment(UNO_LB_UNO), Environment::getCurrent());
+    Mapping uno2cpp(Environment(u"" UNO_LB_UNO ""_ustr), Environment::getCurrent());
     if (! uno2cpp.is())
     {
         throw RuntimeException(
-            "cannot get binary UNO to C++ mapping!" );
+            u"cannot get binary UNO to C++ mapping!"_ustr );
     }
 
     typelib_TypeDescription * pTD = nullptr;
@@ -296,7 +296,7 @@ Any SAL_CALL getCaughtException()
 
     if (exc == nullptr)
     {
-        throw RuntimeException( "rethrowing C++ exception failed!" );
+        throw RuntimeException( u"rethrowing C++ exception failed!"_ustr );
     }
 
     Any ret;
diff --git a/cppuhelper/source/factory.cxx b/cppuhelper/source/factory.cxx
index d039e43824a8..b4a9d06c4d9e 100644
--- a/cppuhelper/source/factory.cxx
+++ b/cppuhelper/source/factory.cxx
@@ -272,7 +272,7 @@ OFactoryComponentHelper::createInstanceWithArgumentsEveryTime(
                 xComp->dispose();
 
             throw lang::IllegalArgumentException(
-                "cannot pass arguments to component => no XInitialization implemented!",
+                u"cannot pass arguments to component => no XInitialization implemented!"_ustr,
                 Reference< XInterface >(), 0 );
         }
     }
@@ -459,7 +459,7 @@ IPropertyArrayHelper & ORegistryFactoryHelper::getInfoHelper()
     if (m_property_array_helper == nullptr)
     {
         beans::Property prop(
-            "ImplementationKey" /* name */,
+            u"ImplementationKey"_ustr /* name */,
             0 /* handle */,
             cppu::UnoType<decltype(xImplementationKey)>::get(),
             beans::PropertyAttribute::READONLY |
@@ -483,7 +483,7 @@ void ORegistryFactoryHelper::setFastPropertyValue_NoBroadcast(
     sal_Int32, Any const & )
 {
     throw beans::PropertyVetoException(
-        "unexpected: only readonly properties!",
+        u"unexpected: only readonly properties!"_ustr,
         static_cast< OWeakObject * >(this) );
 }
 
@@ -499,7 +499,7 @@ void ORegistryFactoryHelper::getFastPropertyValue(
     {
         rValue.clear();
         throw beans::UnknownPropertyException(
-            "unknown property!", static_cast< OWeakObject * >(
+            u"unknown property!"_ustr, static_cast< OWeakObject * >(
                 const_cast< ORegistryFactoryHelper * >(this) ) );
     }
 }
@@ -599,7 +599,7 @@ Reference< XInterface > ORegistryFactoryHelper::createModuleFactory()
     OUString aLocation;
 
     Reference<XRegistryKey > xActivatorKey = xImplementationKey->openKey(
-        "/UNO/ACTIVATOR" );
+        u"/UNO/ACTIVATOR"_ustr );
     if( xActivatorKey.is() && xActivatorKey->getValueType() == RegistryValueType_ASCII )
     {
         aActivatorUrl = xActivatorKey->getAsciiValue();
@@ -607,7 +607,7 @@ Reference< XInterface > ORegistryFactoryHelper::createModuleFactory()
         aActivatorName = o3tl::getToken(aActivatorUrl, 0, ':');
 
         Reference<XRegistryKey > xLocationKey = xImplementationKey->openKey(
-            "/UNO/LOCATION" );
+            u"/UNO/LOCATION"_ustr );
         if( xLocationKey.is() && xLocationKey->getValueType() == RegistryValueType_ASCII )
             aLocation = xLocationKey->getAsciiValue();
     }
@@ -616,7 +616,7 @@ Reference< XInterface > ORegistryFactoryHelper::createModuleFactory()
         // old style"url"
         // the location of the program code of the implementation
         Reference<XRegistryKey > xLocationKey = xImplementationKey->openKey(
-            "/UNO/URL" );
+            u"/UNO/URL"_ustr );
         // is the key of the right type ?
         if( xLocationKey.is() && xLocationKey->getValueType() == RegistryValueType_ASCII )
         {
@@ -659,7 +659,7 @@ Sequence< OUString > ORegistryFactoryHelper::getSupportedServiceNames()
         // not yet loaded
         try
         {
-            Reference<XRegistryKey > xKey = xImplementationKey->openKey( "UNO/SERVICES" );
+            Reference<XRegistryKey > xKey = xImplementationKey->openKey( u"UNO/SERVICES"_ustr );
 
             if (xKey.is())
             {
diff --git a/cppuhelper/source/paths.cxx b/cppuhelper/source/paths.cxx
index cf8c748ee7e0..0a4ccf76e6ef 100644
--- a/cppuhelper/source/paths.cxx
+++ b/cppuhelper/source/paths.cxx
@@ -88,14 +88,14 @@ bool cppu::nextDirectoryItem(osl::Directory & directory, OUString * url) {
             return false;
         default:
             throw css::uno::DeploymentException(
-                "Cannot iterate directory");
+                u"Cannot iterate directory"_ustr);
         }
         osl::FileStatus stat(
             osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileName |
             osl_FileStatus_Mask_FileURL);
         if (i.getFileStatus(stat) != osl::FileBase::E_None) {
             throw css::uno::DeploymentException(
-                "Cannot stat in directory");
+                u"Cannot stat in directory"_ustr);
         }
         if (stat.getFileType() != osl::FileStatus::Directory) { //TODO: symlinks
             // Ignore backup and spurious junk files:
diff --git a/cppuhelper/source/propertysetmixin.cxx b/cppuhelper/source/propertysetmixin.cxx
index c3c1ad0a66c8..b2c23dc2b507 100644
--- a/cppuhelper/source/propertysetmixin.cxx
+++ b/cppuhelper/source/propertysetmixin.cxx
@@ -231,7 +231,7 @@ void Data::initProperties(
                         getTypeArguments());
                 if (args.getLength() != 1) {
                     throw css::uno::RuntimeException(
-                        "inconsistent UNO type registry");
+                        u"inconsistent UNO type registry"_ustr);
                 }
                 t = args[0];
             }
@@ -239,7 +239,7 @@ void Data::initProperties(
                 = handleNames->size();
             if (handles > SAL_MAX_INT32) {
                 throw css::uno::RuntimeException(
-                    "interface type has too many attributes");
+                    u"interface type has too many attributes"_ustr);
             }
             OUString name(m->getMemberName());
             if (!properties.emplace(
@@ -255,7 +255,7 @@ void Data::initProperties(
                 second)
             {
                 throw css::uno::RuntimeException(
-                    "inconsistent UNO type registry");
+                    u"inconsistent UNO type registry"_ustr);
             }
             handleNames->push_back(name);
         }
@@ -425,8 +425,8 @@ PropertySetMixinImpl::Impl::Impl(
         ifc.set(
             css::uno::Reference< css::container::XHierarchicalNameAccess >(
                 m_context->getValueByName(
-                    "/singletons/com.sun.star.reflection."
-                    "theTypeDescriptionManager"),
+                    u"/singletons/com.sun.star.reflection."
+                    "theTypeDescriptionManager"_ustr),
                 css::uno::UNO_QUERY_THROW)->getByHierarchicalName(
                     m_type.getTypeName()),
             css::uno::UNO_QUERY_THROW);
@@ -607,17 +607,17 @@ css::uno::Any PropertySetMixinImpl::Impl::getProperty(
                 getReflection(value.getValueTypeName()));
             try {
                 if (!(css::uno::Reference< css::reflection::XIdlField2 >(
-                          ambiguous->getField("IsAmbiguous"),
+                          ambiguous->getField(u"IsAmbiguous"_ustr),
                           css::uno::UNO_QUERY_THROW)->get(value)
                       >>= isAmbiguous))
                 {
                     throw css::uno::RuntimeException(
-                        ("unexpected type of com.sun.star.beans.Ambiguous"
-                         " IsAmbiguous member"),
+                        (u"unexpected type of com.sun.star.beans.Ambiguous"
+                         " IsAmbiguous member"_ustr),
                         object);
                 }
                 value = css::uno::Reference< css::reflection::XIdlField2 >(
-                    ambiguous->getField("Value"), css::uno::UNO_QUERY_THROW)->
+                    ambiguous->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW)->
                     get(value);
             } catch (css::lang::IllegalArgumentException & e) {
                 css::uno::Any anyEx = cppu::getCaughtException();
@@ -636,17 +636,17 @@ css::uno::Any PropertySetMixinImpl::Impl::getProperty(
             try {
 
                 if (!(css::uno::Reference< css::reflection::XIdlField2 >(
-                          defaulted->getField("IsDefaulted"),
+                          defaulted->getField(u"IsDefaulted"_ustr),
                           css::uno::UNO_QUERY_THROW)->get(value)
                       >>= isDefaulted))
                 {
                     throw css::uno::RuntimeException(
-                        ("unexpected type of com.sun.star.beans.Defaulted"
-                         " IsDefaulted member"),
+                        (u"unexpected type of com.sun.star.beans.Defaulted"
+                         " IsDefaulted member"_ustr),
                         object);
                 }
                 value = css::uno::Reference< css::reflection::XIdlField2 >(
-                    defaulted->getField("Value"), css::uno::UNO_QUERY_THROW)->
+                    defaulted->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW)->
                     get(value);
             } catch (css::lang::IllegalArgumentException & e) {
                 css::uno::Any anyEx = cppu::getCaughtException();
@@ -665,13 +665,13 @@ css::uno::Any PropertySetMixinImpl::Impl::getProperty(
             try {
                 bool present = false;
                 if (!(css::uno::Reference< css::reflection::XIdlField2 >(
-                          optional->getField("IsPresent"),
+                          optional->getField(u"IsPresent"_ustr),
                           css::uno::UNO_QUERY_THROW)->get(value)
                       >>= present))
                 {
                     throw css::uno::RuntimeException(
-                        ("unexpected type of com.sun.star.beans.Optional"
-                         " IsPresent member"),
+                        (u"unexpected type of com.sun.star.beans.Optional"
+                         " IsPresent member"_ustr),
                         object);
                 }
                 if (!present) {
@@ -679,7 +679,7 @@ css::uno::Any PropertySetMixinImpl::Impl::getProperty(
                     break;
                 }
                 value = css::uno::Reference< css::reflection::XIdlField2 >(
-                    optional->getField("Value"), css::uno::UNO_QUERY_THROW)->
+                    optional->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW)->
                     get(value);
             } catch (css::lang::IllegalArgumentException & e) {
                 css::uno::Any anyEx = cppu::getCaughtException();
@@ -730,14 +730,14 @@ css::uno::Any PropertySetMixinImpl::Impl::wrapValue(
         type->createObject(strct);
         try {
             css::uno::Reference< css::reflection::XIdlField2 > field(
-                type->getField("Value"), css::uno::UNO_QUERY_THROW);
+                type->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW);
             field->set(
                 strct,
                 wrapValue(
                     object, value, field->getType(), false, false,
                     wrapDefaulted, isDefaulted, wrapOptional));
             css::uno::Reference< css::reflection::XIdlField2 >(
-                type->getField("IsAmbiguous"), css::uno::UNO_QUERY_THROW)->set(
+                type->getField(u"IsAmbiguous"_ustr), css::uno::UNO_QUERY_THROW)->set(
                     strct, css::uno::Any(isAmbiguous));
         } catch (css::lang::IllegalArgumentException & e) {
             css::uno::Any anyEx = cppu::getCaughtException();
@@ -761,14 +761,14 @@ css::uno::Any PropertySetMixinImpl::Impl::wrapValue(
         type->createObject(strct);
         try {
             css::uno::Reference< css::reflection::XIdlField2 > field(
-                type->getField("Value"), css::uno::UNO_QUERY_THROW);
+                type->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW);
             field->set(
                 strct,
                 wrapValue(
                     object, value, field->getType(), wrapAmbiguous, isAmbiguous,
                     false, false, wrapOptional));
             css::uno::Reference< css::reflection::XIdlField2 >(
-                type->getField("IsDefaulted"), css::uno::UNO_QUERY_THROW)->set(
+                type->getField(u"IsDefaulted"_ustr), css::uno::UNO_QUERY_THROW)->set(
                     strct, css::uno::Any(isDefaulted));
         } catch (css::lang::IllegalArgumentException & e) {
             css::uno::Any anyEx = cppu::getCaughtException();
@@ -793,11 +793,11 @@ css::uno::Any PropertySetMixinImpl::Impl::wrapValue(
         bool present = value.hasValue();
         try {
             css::uno::Reference< css::reflection::XIdlField2 >(
-                type->getField("IsPresent"), css::uno::UNO_QUERY_THROW)->set(
+                type->getField(u"IsPresent"_ustr), css::uno::UNO_QUERY_THROW)->set(
                     strct, css::uno::Any(present));
             if (present) {
                 css::uno::Reference< css::reflection::XIdlField2 > field(
-                    type->getField("Value"), css::uno::UNO_QUERY_THROW);
+                    type->getField(u"Value"_ustr), css::uno::UNO_QUERY_THROW);
                 field->set(
                     strct,
                     wrapValue(
@@ -821,7 +821,7 @@ css::uno::Any PropertySetMixinImpl::Impl::wrapValue(
     }
     if (wrapAmbiguous || wrapDefaulted || wrapOptional) {
         throw css::uno::RuntimeException(
-            "unexpected type of attribute", object);
+            u"unexpected type of attribute"_ustr, object);
     }
     return value;
 }
@@ -859,7 +859,7 @@ void PropertySetMixinImpl::prepareSet(
         std::scoped_lock g(m_impl->mutex);
         if (m_impl->disposed) {
             throw css::lang::DisposedException(
-                "disposed", static_cast< css::beans::XPropertySet * >(this));
+                u"disposed"_ustr, static_cast< css::beans::XPropertySet * >(this));
         }
         if ((it->second.property.Attributes
              & css::beans::PropertyAttribute::CONSTRAINED)
@@ -870,7 +870,7 @@ void PropertySetMixinImpl::prepareSet(
             if (i != m_impl->vetoListeners.end()) {
                 specificVeto = i->second;
             }
-            i = m_impl->vetoListeners.find("");
+            i = m_impl->vetoListeners.find(u""_ustr);
             if (i != m_impl->vetoListeners.end()) {
                 unspecificVeto = i->second;
             }
@@ -885,7 +885,7 @@ void PropertySetMixinImpl::prepareSet(
             if (i != m_impl->boundListeners.end()) {
                 boundListeners->m_impl->specificListeners = i->second;
             }
-            i = m_impl->boundListeners.find("");
+            i = m_impl->boundListeners.find(u""_ustr);
             if (i != m_impl->boundListeners.end()) {
                 boundListeners->m_impl->unspecificListeners = i->second;
             }
diff --git a/cppuhelper/source/propshlp.cxx b/cppuhelper/source/propshlp.cxx
index 18ee9d1bb770..1dfca5e2a6ec 100644
--- a/cppuhelper/source/propshlp.cxx
+++ b/cppuhelper/source/propshlp.cxx
@@ -869,7 +869,7 @@ void OPropertySetHelper::setPropertyValues(
 {
         sal_Int32   nSeqLen = rPropertyNames.getLength();
         if (nSeqLen != rValues.getLength())
-            throw IllegalArgumentException("lengths do not match", static_cast<XPropertySet*>(this),
+            throw IllegalArgumentException(u"lengths do not match"_ustr, static_cast<XPropertySet*>(this),
                                            -1);
         std::unique_ptr<sal_Int32[]> pHandles(new sal_Int32[ nSeqLen ]);
         // get the map table
diff --git a/cppuhelper/source/servicemanager.cxx b/cppuhelper/source/servicemanager.cxx
index 9085e208ee25..790a776392c4 100644
--- a/cppuhelper/source/servicemanager.cxx
+++ b/cppuhelper/source/servicemanager.cxx
@@ -484,7 +484,7 @@ css::uno::Any ContentEnumeration::nextElement()
     std::scoped_lock g(mutex_);
     if (iterator_ == factories_.end()) {
         throw css::container::NoSuchElementException(
-            "Bootstrap service manager service enumerator has no more elements",
+            u"Bootstrap service manager service enumerator has no more elements"_ustr,
             static_cast< cppu::OWeakObject * >(this));
     }
     return *iterator_++;
@@ -492,7 +492,7 @@ css::uno::Any ContentEnumeration::nextElement()
 
 css::beans::Property getDefaultContextProperty() {
     return css::beans::Property(
-        "DefaultContext", -1,
+        u"DefaultContext"_ustr, -1,
         cppu::UnoType< css::uno::XComponentContext >::get(),
         css::beans::PropertyAttribute::READONLY);
 }
@@ -941,7 +941,7 @@ void cppuhelper::ServiceManager::initialize(
         || arg != "preload")
     {
         throw css::lang::IllegalArgumentException(
-            "invalid ServiceManager::initialize argument",
+            u"invalid ServiceManager::initialize argument"_ustr,
             css::uno::Reference<css::uno::XInterface>(), 0);
     }
     preloadImplementations();
@@ -950,7 +950,7 @@ void cppuhelper::ServiceManager::initialize(
 OUString cppuhelper::ServiceManager::getImplementationName()
 {
     return
-        "com.sun.star.comp.cppuhelper.bootstrap.ServiceManager";
+        u"com.sun.star.comp.cppuhelper.bootstrap.ServiceManager"_ustr;
 }
 
 sal_Bool cppuhelper::ServiceManager::supportsService(
@@ -962,7 +962,7 @@ sal_Bool cppuhelper::ServiceManager::supportsService(
 css::uno::Sequence< OUString >
 cppuhelper::ServiceManager::getSupportedServiceNames()
 {
-    return { "com.sun.star.lang.MultiServiceFactory", "com.sun.star.lang.ServiceManager" };
+    return { u"com.sun.star.lang.MultiServiceFactory"_ustr, u"com.sun.star.lang.ServiceManager"_ustr };
 }
 
 css::uno::Reference< css::uno::XInterface >
@@ -992,7 +992,7 @@ cppuhelper::ServiceManager::getAvailableServiceNames()
     }
     if (data_.services.size() > o3tl::make_unsigned(SAL_MAX_INT32)) {
         throw css::uno::RuntimeException(
-            "getAvailableServiceNames: too many services",
+            u"getAvailableServiceNames: too many services"_ustr,
             static_cast< cppu::OWeakObject * >(this));
     }
     return comphelper::mapKeysToSequence(data_.services);
@@ -1038,14 +1038,14 @@ css::uno::Reference< css::container::XEnumeration >
 cppuhelper::ServiceManager::createEnumeration()
 {
     throw css::uno::RuntimeException(
-        "ServiceManager createEnumeration: method not supported",
+        u"ServiceManager createEnumeration: method not supported"_ustr,
         static_cast< cppu::OWeakObject * >(this));
 }
 
 sal_Bool cppuhelper::ServiceManager::has(css::uno::Any const &)
 {
     throw css::uno::RuntimeException(
-        "ServiceManager has: method not supported",
+        u"ServiceManager has: method not supported"_ustr,
         static_cast< cppu::OWeakObject * >(this));
 }
 
@@ -1060,19 +1060,19 @@ void cppuhelper::ServiceManager::insert(css::uno::Any const & aElement)
                 OUString uri;
                 if (!(arg.Value >>= uri)) {
                     throw css::lang::IllegalArgumentException(
-                        "Bad uri argument",
+                        u"Bad uri argument"_ustr,
                         static_cast< cppu::OWeakObject * >(this), 0);
                 }
                 uris.push_back(uri);
             } else if (arg.Name == "component-context") {
                 if (alienContext.is()) {
                     throw css::lang::IllegalArgumentException(
-                        "Multiple component-context arguments",
+                        u"Multiple component-context arguments"_ustr,
                         static_cast< cppu::OWeakObject * >(this), 0);
                 }
                 if (!(arg.Value >>= alienContext) || !alienContext.is()) {
                     throw css::lang::IllegalArgumentException(
-                        "Bad component-context argument",
+                        u"Bad component-context argument"_ustr,
                         static_cast< cppu::OWeakObject * >(this), 0);
                 }
             } else {
@@ -1091,7 +1091,7 @@ void cppuhelper::ServiceManager::insert(css::uno::Any const & aElement)
     }
 
     throw css::lang::IllegalArgumentException(
-        "Bad insert element", static_cast< cppu::OWeakObject * >(this), 0);
+        u"Bad insert element"_ustr, static_cast< cppu::OWeakObject * >(this), 0);
 }
 
 void cppuhelper::ServiceManager::remove(css::uno::Any const & aElement)
@@ -1108,7 +1108,7 @@ void cppuhelper::ServiceManager::remove(css::uno::Any const & aElement)
             OUString uri;
             if (!(i.Value >>= uri)) {
                 throw css::lang::IllegalArgumentException(
-                    "Bad uri argument",
+                    u"Bad uri argument"_ustr,
                     static_cast< cppu::OWeakObject * >(this), 0);
             }
             uris.push_back(uri);
@@ -1120,7 +1120,7 @@ void cppuhelper::ServiceManager::remove(css::uno::Any const & aElement)
     if ((aElement >>= info) && info.is()) {
         if (!removeLegacyFactory(info, true)) {
             throw css::container::NoSuchElementException(
-                "Remove non-inserted factory object",
+                u"Remove non-inserted factory object"_ustr,
                 static_cast< cppu::OWeakObject * >(this));
         }
         return;
@@ -1132,7 +1132,7 @@ void cppuhelper::ServiceManager::remove(css::uno::Any const & aElement)
         return;
     }
     throw css::lang::IllegalArgumentException(
-        "Bad remove element", static_cast< cppu::OWeakObject * >(this), 0);
+        u"Bad remove element"_ustr, static_cast< cppu::OWeakObject * >(this), 0);
 }
 
 css::uno::Reference< css::container::XEnumeration >
@@ -1415,7 +1415,7 @@ bool cppuhelper::ServiceManager::readLegacyRdbFile(OUString const & uri) {
             static_cast< cppu::OWeakObject * >(this));
     }
     RegistryKeyArray impls;
-    switch (rootKey.openSubKeys("IMPLEMENTATIONS", impls)) {
+    switch (rootKey.openSubKeys(u"IMPLEMENTATIONS"_ustr, impls)) {
     case RegError::NO_ERROR:
         break;
     case RegError::KEY_NOT_EXISTS:
@@ -1432,8 +1432,8 @@ bool cppuhelper::ServiceManager::readLegacyRdbFile(OUString const & uri) {
             implKey.getName().copy(RTL_CONSTASCII_LENGTH("/IMPLEMENTATIONS/")));
         std::shared_ptr< Data::Implementation > impl =
             std::make_shared<Data::Implementation>(
-                name, readLegacyRdbString(uri, implKey, "UNO/ACTIVATOR"),
-                readLegacyRdbString(uri, implKey, "UNO/LOCATION"), "", "", "", false,
+                name, readLegacyRdbString(uri, implKey, u"UNO/ACTIVATOR"_ustr),
+                readLegacyRdbString(uri, implKey, u"UNO/LOCATION"_ustr), "", "", "", false,
                 css::uno::Reference< css::uno::XComponentContext >(), uri);
         if (!data_.namedImplementations.emplace(name, impl).second)
         {
@@ -1441,13 +1441,13 @@ bool cppuhelper::ServiceManager::readLegacyRdbFile(OUString const & uri) {
                 uri + ": duplicate <implementation name=\"" + name + "\">");
         }
         readLegacyRdbStrings(
-            uri, implKey, "UNO/SERVICES", &impl->services);
+            uri, implKey, u"UNO/SERVICES"_ustr, &impl->services);
         for (const auto& rService : impl->services)
         {
             data_.services[rService].push_back(impl);
         }
         readLegacyRdbStrings(
-            uri, implKey, "UNO/SINGLETONS", &impl->singletons);
+            uri, implKey, u"UNO/SINGLETONS"_ustr, &impl->singletons);
         for (const auto& rSingleton : impl->singletons)
         {
             data_.singletons[rSingleton].push_back(impl);
@@ -1553,8 +1553,8 @@ void cppuhelper::ServiceManager::insertLegacyFactory(
         f2.set(factoryInfo, css::uno::UNO_QUERY);
         if (!f2.is()) {
             throw css::lang::IllegalArgumentException(
-                ("Bad XServiceInfo argument implements neither"
-                 " XSingleComponentFactory nor XSingleServiceFactory"),
+                (u"Bad XServiceInfo argument implements neither"
+                 " XSingleComponentFactory nor XSingleServiceFactory"_ustr),
                 static_cast< cppu::OWeakObject * >(this), 0);
         }
     }
@@ -1599,7 +1599,7 @@ bool cppuhelper::ServiceManager::insertExtraData(Data const & extra) {
         if (bDuplicate)
         {
             throw css::lang::IllegalArgumentException(
-                "Insert duplicate factory object",
+                u"Insert duplicate factory object"_ustr,
                 static_cast< cppu::OWeakObject * >(this), 0);
         }
         //TODO: The below leaves data_ in an inconsistent state upon exceptions:
diff --git a/cppuhelper/source/shlib.cxx b/cppuhelper/source/shlib.cxx
index b270c62c5cb4..b6885cbed770 100644
--- a/cppuhelper/source/shlib.cxx
+++ b/cppuhelper/source/shlib.cxx
@@ -126,7 +126,7 @@ css::uno::Reference<css::uno::XInterface> invokeComponentFactory(
 {
     if (!(source.is() && target.is())) {
         throw css::loader::CannotActivateFactoryException(
-            "cannot get environments",
+            u"cannot get environments"_ustr,
             css::uno::Reference<css::uno::XInterface>());
     }
     OString impl(
@@ -141,7 +141,7 @@ css::uno::Reference<css::uno::XInterface> invokeComponentFactory(
     css::uno::Mapping mapFrom(target, source);
     if (!(mapTo.is() && mapFrom.is())) {
         throw css::loader::CannotActivateFactoryException(
-            "cannot get mappings",
+            u"cannot get mappings"_ustr,
             css::uno::Reference<css::uno::XInterface>());
     }
     void * smgr = mapTo.mapInterface(
@@ -189,7 +189,7 @@ cppuhelper::WrapperConstructorFn mapConstructorFn(
 {
     if (!(source.is() && target.is())) {
         throw css::loader::CannotActivateFactoryException(
-            "cannot get environments",
+            u"cannot get environments"_ustr,
             css::uno::Reference<css::uno::XInterface>());
     }
     if (source.get() == target.get()) {
@@ -202,7 +202,7 @@ cppuhelper::WrapperConstructorFn mapConstructorFn(
     css::uno::Mapping mapFrom(target, source);
     if (!(mapTo.is() && mapFrom.is())) {
         throw css::loader::CannotActivateFactoryException(
-            "cannot get mappings",
+            u"cannot get mappings"_ustr,
             css::uno::Reference<css::uno::XInterface>());
     }
     return [mapFrom, mapTo, target, constructorFunction]
@@ -365,7 +365,7 @@ css::uno::Reference<css::uno::XInterface> cppu::loadSharedLibComponentFactory(
     assert(!xKey.is()); (void) xKey;
     css::uno::Reference<css::uno::XInterface> fac;
     cppuhelper::detail::loadSharedLibComponentFactory(
-        uri, "", "", rImplName, "", xMgr, nullptr, &fac);
+        uri, u""_ustr, u""_ustr, rImplName, u""_ustr, xMgr, nullptr, &fac);
     return fac;
 }
 
@@ -403,16 +403,16 @@ void cppu::writeSharedLibComponentInfo(
             css::uno::Reference<css::uno::XInterface>());
     }
     css::uno::Environment curEnv(css::uno::Environment::getCurrent());
-    css::uno::Environment env(getEnvironmentFromModule(mod, curEnv, u"", ""));
+    css::uno::Environment env(getEnvironmentFromModule(mod, curEnv, u"", u""_ustr));
     if (!(curEnv.is() && env.is())) {
         throw css::registry::CannotRegisterImplementationException(
-            "cannot get environments",
+            u"cannot get environments"_ustr,
             css::uno::Reference<css::uno::XInterface>());
     }
     css::uno::Mapping map(curEnv, env);
     if (!map.is()) {
         throw css::registry::CannotRegisterImplementationException(
-            "cannot get mapping", css::uno::Reference<css::uno::XInterface>());
+            u"cannot get mapping"_ustr, css::uno::Reference<css::uno::XInterface>());
     }
     void * smgr = map.mapInterface(
         xMgr.get(), cppu::UnoType<css::lang::XMultiServiceFactory>::get());
diff --git a/cppuhelper/source/tdmgr.cxx b/cppuhelper/source/tdmgr.cxx
index 1e5826e248c7..821e4871204a 100644
--- a/cppuhelper/source/tdmgr.cxx
+++ b/cppuhelper/source/tdmgr.cxx
@@ -431,91 +431,91 @@ static typelib_TypeDescription * createCTD(
             // built in types
         case TypeClass_VOID:
         {
-            OUString aTypeName("void");
+            OUString aTypeName(u"void"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_VOID, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_CHAR:
         {
-            OUString aTypeName("char");
+            OUString aTypeName(u"char"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_CHAR, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_BOOLEAN:
         {
-            OUString aTypeName("boolean");
+            OUString aTypeName(u"boolean"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_BOOLEAN, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_BYTE:
         {
-            OUString aTypeName("byte");
+            OUString aTypeName(u"byte"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_BYTE, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_SHORT:
         {
-            OUString aTypeName("short");
+            OUString aTypeName(u"short"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_SHORT, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_UNSIGNED_SHORT:
         {
-            OUString aTypeName("unsigned short");
+            OUString aTypeName(u"unsigned short"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_UNSIGNED_SHORT, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_LONG:
         {
-            OUString aTypeName("long");
+            OUString aTypeName(u"long"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_LONG, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_UNSIGNED_LONG:
         {
-            OUString aTypeName("unsigned long");
+            OUString aTypeName(u"unsigned long"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_UNSIGNED_LONG, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_HYPER:
         {
-            OUString aTypeName("hyper");
+            OUString aTypeName(u"hyper"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_HYPER, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_UNSIGNED_HYPER:
         {
-            OUString aTypeName("unsigned hyper");
+            OUString aTypeName(u"unsigned hyper"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_UNSIGNED_HYPER, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_FLOAT:
         {
-            OUString aTypeName("float");
+            OUString aTypeName(u"float"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_FLOAT, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_DOUBLE:
         {
-            OUString aTypeName("double");
+            OUString aTypeName(u"double"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_DOUBLE, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_STRING:
         {
-            OUString aTypeName("string");
+            OUString aTypeName(u"string"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_STRING, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_TYPE:
         {
-            OUString aTypeName("type");
+            OUString aTypeName(u"type"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_TYPE, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
         case TypeClass_ANY:
         {
-            OUString aTypeName("any");
+            OUString aTypeName(u"any"_ustr);
             typelib_typedescription_new( &pRet, typelib_TypeClass_ANY, aTypeName.pData, nullptr, 0, nullptr );
             break;
         }
diff --git a/cppuhelper/source/typemanager.cxx b/cppuhelper/source/typemanager.cxx
index 29f7025cdf6a..2d48326e540b 100644
--- a/cppuhelper/source/typemanager.cxx
+++ b/cppuhelper/source/typemanager.cxx
@@ -1711,7 +1711,7 @@ Enumeration::nextTypeDescription()
         std::scoped_lock g(mutex_);
         if (positions_.empty()) {
             throw css::container::NoSuchElementException(
-                "exhausted XTypeDescriptionEnumeration",
+                u"exhausted XTypeDescriptionEnumeration"_ustr,
                 static_cast< cppu::OWeakObject * >(this));
         }
         name = current_;
@@ -1905,7 +1905,7 @@ cppuhelper::TypeManager::~TypeManager() noexcept {}
 OUString cppuhelper::TypeManager::getImplementationName()
 {
     return
-        "com.sun.star.comp.cppuhelper.bootstrap.TypeManager";
+        u"com.sun.star.comp.cppuhelper.bootstrap.TypeManager"_ustr;
 }
 
 sal_Bool cppuhelper::TypeManager::supportsService(
@@ -1917,7 +1917,7 @@ sal_Bool cppuhelper::TypeManager::supportsService(
 css::uno::Sequence< OUString >
 cppuhelper::TypeManager::getSupportedServiceNames()
 {
-    return { "com.sun.star.reflection.TypeDescriptionManager" }; //TODO
+    return { u"com.sun.star.reflection.TypeDescriptionManager"_ustr }; //TODO
 }
 
 css::uno::Any cppuhelper::TypeManager::getByHierarchicalName(
@@ -1945,7 +1945,7 @@ css::uno::Type cppuhelper::TypeManager::getElementType()
 sal_Bool cppuhelper::TypeManager::hasElements()
 {
     throw css::uno::RuntimeException(
-        "TypeManager hasElements: method not supported",
+        u"TypeManager hasElements: method not supported"_ustr,
         static_cast< cppu::OWeakObject * >(this));
 }
 
@@ -1953,14 +1953,14 @@ css::uno::Reference< css::container::XEnumeration >
 cppuhelper::TypeManager::createEnumeration()
 {
     throw css::uno::RuntimeException(
-        "TypeManager createEnumeration: method not supported",
+        u"TypeManager createEnumeration: method not supported"_ustr,
         static_cast< cppu::OWeakObject * >(this));
 }
 
 sal_Bool cppuhelper::TypeManager::has(css::uno::Any const &)
 {
     throw css::uno::RuntimeException(
-        "TypeManager has: method not supported",
+        u"TypeManager has: method not supported"_ustr,
         static_cast< cppu::OWeakObject * >(this));
 }
 
@@ -1969,8 +1969,8 @@ void cppuhelper::TypeManager::insert(css::uno::Any const & aElement)
     OUString uri;
     if (!(aElement >>= uri)) {
         throw css::lang::IllegalArgumentException(
-            ("css.uno.theTypeDescriptionManager.insert expects a string URI"
-             " argument"),
+            (u"css.uno.theTypeDescriptionManager.insert expects a string URI"
+             " argument"_ustr),
             static_cast< cppu::OWeakObject * >(this), 0);
     }
     //TODO: check for ElementExistException
@@ -1983,8 +1983,8 @@ void cppuhelper::TypeManager::remove(css::uno::Any const & aElement)
     OUString uri;
     if (!(aElement >>= uri)) {
         throw css::lang::IllegalArgumentException(
-            ("css.uno.theTypeDescriptionManager.remove expects a string URI"
-             " argument"),
+            (u"css.uno.theTypeDescriptionManager.remove expects a string URI"
+             " argument"_ustr),
             static_cast< cppu::OWeakObject * >(this), 0);
     }
     //TODO: remove requests are silently ignored for now
diff --git a/cppuhelper/source/unourl.cxx b/cppuhelper/source/unourl.cxx
index 9656dd078ba1..be01adb460de 100644
--- a/cppuhelper/source/unourl.cxx
+++ b/cppuhelper/source/unourl.cxx
@@ -68,7 +68,7 @@ inline UnoUrlDescriptor::Impl::Impl(OUString const & rDescriptor)
         case STATE_NAME0:
             if (bEnd || !rtl::isAsciiAlphanumeric(c))
                 throw rtl::MalformedUriException(
-                    "UNO URL contains bad descriptor name");
+                    u"UNO URL contains bad descriptor name"_ustr);
             nStart = i;
             eState = STATE_NAME;
             break;
@@ -82,13 +82,13 @@ inline UnoUrlDescriptor::Impl::Impl(OUString const & rDescriptor)
             }
             else if (!rtl::isAsciiAlphanumeric(c))
                 throw rtl::MalformedUriException(
-                    "UNO URL contains bad descriptor name");
+                    u"UNO URL contains bad descriptor name"_ustr);
             break;
 
         case STATE_KEY0:
             if (bEnd || !rtl::isAsciiAlphanumeric(c))
                 throw rtl::MalformedUriException(
-                    "UNO URL contains bad parameter key");
+                    u"UNO URL contains bad parameter key"_ustr);
             nStart = i;
             eState = STATE_KEY;
             break;
@@ -102,7 +102,7 @@ inline UnoUrlDescriptor::Impl::Impl(OUString const & rDescriptor)
             }
             else if (bEnd || !rtl::isAsciiAlphanumeric(c))
                 throw rtl::MalformedUriException(
-                    "UNO URL contains bad parameter key");
+                    u"UNO URL contains bad parameter key"_ustr);
             break;
 
         case STATE_VALUE:
@@ -115,7 +115,7 @@ inline UnoUrlDescriptor::Impl::Impl(OUString const & rDescriptor)
                                              rtl_UriDecodeWithCharset,
                                              RTL_TEXTENCODING_UTF8)).second)
                     throw rtl::MalformedUriException(
-                        "UNO URL contains duplicated parameter");
+                        u"UNO URL contains duplicated parameter"_ustr);
                 eState = STATE_KEY0;
             }
             break;
@@ -198,20 +198,20 @@ private:
 inline UnoUrl::Impl * UnoUrl::Impl::create(OUString const & rUrl)
 {
     if (!rUrl.startsWithIgnoreAsciiCase("uno:"))
-        throw rtl::MalformedUriException("UNO URL does not start with \"uno:\"");
+        throw rtl::MalformedUriException(u"UNO URL does not start with \"uno:\""_ustr);
     sal_Int32 i = RTL_CONSTASCII_LENGTH("uno:");
     sal_Int32 j = rUrl.indexOf(';', i);
     if (j < 0)
-        throw rtl::MalformedUriException("UNO URL has too few semicolons");
+        throw rtl::MalformedUriException(u"UNO URL has too few semicolons"_ustr);
     OUString aConnection(rUrl.copy(i, j - i));
     i = j + 1;
     j = rUrl.indexOf(0x3B, i); // ';'
     if (j < 0)
-        throw rtl::MalformedUriException("UNO URL has too few semicolons");
+        throw rtl::MalformedUriException(u"UNO URL has too few semicolons"_ustr);
     OUString aProtocol(rUrl.copy(i, j - i));
     i = j + 1;
     if (i == rUrl.getLength())
-        throw rtl::MalformedUriException("UNO URL contains empty ObjectName");
+        throw rtl::MalformedUriException(u"UNO URL contains empty ObjectName"_ustr);
     for (j = i; j < rUrl.getLength(); ++j)
     {
         sal_Unicode c = rUrl[j];
@@ -222,7 +222,7 @@ inline UnoUrl::Impl * UnoUrl::Impl::create(OUString const & rUrl)
             && c != 0x2F && c != 0x3A && c != 0x3D // '/', ':', '='
             && c != 0x3F && c != 0x40 && c != 0x5F // '?', '@', '_'
             && c != 0x7E) // '~'
-            throw rtl::MalformedUriException("UNO URL contains invalid ObjectName");
+            throw rtl::MalformedUriException(u"UNO URL contains invalid ObjectName"_ustr);
     }
     return new Impl(aConnection, aProtocol, rUrl.copy(i));
 }