diff --git a/sdext/IwyuFilter_sdext.yaml b/sdext/IwyuFilter_sdext.yaml
index 9a0aaea804cc..2b00c256b4d2 100644
--- a/sdext/IwyuFilter_sdext.yaml
+++ b/sdext/IwyuFilter_sdext.yaml
@@ -1,5 +1,5 @@
 ---
-assumeFilename: sdext/source/presenter/PresenterSlideSorter.cxx
+assumeFilename: sdext/source/pdfimport/pdfiadaptor.cxx
 excludelist:
     sdext/source/pdfimport/odf/odfemitter.cxx:
     # Actually in use
diff --git a/sdext/qa/unit/pdfimport.cxx b/sdext/qa/unit/pdfimport.cxx
index 18988d6845de..462edf2e7772 100644
--- a/sdext/qa/unit/pdfimport.cxx
+++ b/sdext/qa/unit/pdfimport.cxx
@@ -54,7 +54,6 @@
 #include <rtl/ustring.hxx>
 #include <rtl/ref.hxx>
 
-using namespace ::pdfparse;
 using namespace ::pdfi;
 using namespace ::com::sun::star;
 
diff --git a/sdext/source/minimizer/fileopendialog.cxx b/sdext/source/minimizer/fileopendialog.cxx
index 44dfb51bc74f..7ae877b13549 100644
--- a/sdext/source/minimizer/fileopendialog.cxx
+++ b/sdext/source/minimizer/fileopendialog.cxx
@@ -35,7 +35,6 @@ using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::beans;
 using namespace ::com::sun::star::container;
-using namespace ::com::sun::star::view;
 using namespace ::com::sun::star::ui::dialogs;
 
 FileOpenDialog::FileOpenDialog( const Reference< XComponentContext >& rxContext )
diff --git a/sdext/source/minimizer/impoptimizer.cxx b/sdext/source/minimizer/impoptimizer.cxx
index c46617175e1c..abf54e296a77 100644
--- a/sdext/source/minimizer/impoptimizer.cxx
+++ b/sdext/source/minimizer/impoptimizer.cxx
@@ -63,7 +63,6 @@ using namespace ::com::sun::star::frame;
 using namespace ::com::sun::star::beans;
 using namespace ::com::sun::star::drawing;
 using namespace ::com::sun::star::graphic;
-using namespace ::com::sun::star::document;
 using namespace ::com::sun::star::container;
 using namespace ::com::sun::star::presentation;
 
diff --git a/sdext/source/minimizer/informationdialog.cxx b/sdext/source/minimizer/informationdialog.cxx
index caea0fc1d787..9872990a0f45 100644
--- a/sdext/source/minimizer/informationdialog.cxx
+++ b/sdext/source/minimizer/informationdialog.cxx
@@ -29,13 +29,10 @@
 #include <vcl/svapp.hxx>
 
 using namespace ::com::sun::star;
-using namespace ::com::sun::star::ui;
 using namespace ::com::sun::star::awt;
 using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::util;
 using namespace ::com::sun::star::lang;
-using namespace ::com::sun::star::beans;
-using namespace ::com::sun::star::container;
 
 static OUString ImpValueOfInMB( sal_Int64 rVal )
 {
diff --git a/sdext/source/minimizer/optimizerdialog.cxx b/sdext/source/minimizer/optimizerdialog.cxx
index 773970a41b05..7efef618af9b 100644
--- a/sdext/source/minimizer/optimizerdialog.cxx
+++ b/sdext/source/minimizer/optimizerdialog.cxx
@@ -47,13 +47,10 @@
 using namespace ::com::sun::star::io;
 using namespace ::com::sun::star::ui;
 using namespace ::com::sun::star::awt;
-using namespace ::com::sun::star::ucb;
 using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::util;
-using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::frame;
 using namespace ::com::sun::star::beans;
-using namespace ::com::sun::star::container;
 
 IntroPage::IntroPage(weld::Container* pPage, OptimizerDialog& rOptimizerDialog)
     : vcl::OWizardPage(pPage, &rOptimizerDialog, "modules/simpress/ui/pmintropage.ui", "PMIntroPage")
diff --git a/sdext/source/minimizer/optimizerdialogcontrols.cxx b/sdext/source/minimizer/optimizerdialogcontrols.cxx
index 5ed2dd942b7e..d2c4e49f3b95 100644
--- a/sdext/source/minimizer/optimizerdialogcontrols.cxx
+++ b/sdext/source/minimizer/optimizerdialogcontrols.cxx
@@ -37,10 +37,7 @@
 #include <sal/macros.h>
 #include <o3tl/string_view.hxx>
 
-using namespace ::com::sun::star::awt;
 using namespace ::com::sun::star::uno;
-using namespace ::com::sun::star::util;
-using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::frame;
 using namespace ::com::sun::star::beans;
 using namespace ::com::sun::star::drawing;
diff --git a/sdext/source/minimizer/pagecollector.cxx b/sdext/source/minimizer/pagecollector.cxx
index f42c7d271a1a..f86444abbfae 100644
--- a/sdext/source/minimizer/pagecollector.cxx
+++ b/sdext/source/minimizer/pagecollector.cxx
@@ -28,10 +28,8 @@
 
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::uno;
-using namespace ::com::sun::star::awt;
 using namespace ::com::sun::star::drawing;
 using namespace ::com::sun::star::frame;
-using namespace ::com::sun::star::beans;
 using namespace ::com::sun::star::container;
 using namespace ::com::sun::star::presentation;