diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index fb89fc6a7dd..2f4ad54a247 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -11,6 +11,7 @@
       <check>wxArrayString</check>
       <check>wxBitmap</check>
       <check>wxBitmapBundle</check>
+      <check>wxBitmapHandler</check>
       <check>wxBrush</check>
       <check>wxChar</check>
       <check>wxUniChar</check>
@@ -21,6 +22,9 @@
       <check>wxFont</check>
       <check>wxFontInfo</check>
       <check>wxFontList</check>
+      <check>wxFontMetrics</check>
+      <check>wxGraphicsGradientStop</check>
+      <check>wxGraphicsGradientStops</check>
       <check>wxIcon</check>
       <check>wxIconLocation</check>
       <check>wxImage</check>
@@ -5413,7 +5417,8 @@
   </function>
   <!-- http://docs.wxwidgets.org/trunk/classwx_string.html#ab20a87ca731a52c36ec674dae2213ad8 -->
   <!-- size_t wxString::Length () const -->
-  <function name="wxString::Length">
+  <!-- size_t wxString::length () const -->
+  <function name="wxString::Length,wxString::length">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <const/>
diff --git a/test/cfg/wxwidgets.cpp b/test/cfg/wxwidgets.cpp
index 5a0411921a1..553ada84a2a 100644
--- a/test/cfg/wxwidgets.cpp
+++ b/test/cfg/wxwidgets.cpp
@@ -33,6 +33,7 @@
 #include <wx/frame.h>
 #include <wx/gdicmn.h>
 #include <wx/geometry.h>
+#include <wx/graphics.h>
 #include <wx/icon.h>
 #include <wx/iconloc.h>
 #include <wx/image.h>
@@ -79,6 +80,38 @@ void unreadVariable_wxBitmapBundle(const wxBitmap &bmp, const wxIcon &icon, cons
 }
 #endif
 
+void unusedVariable_wxBitmapHandler()
+{
+    // cppcheck-suppress unusedVariable
+    wxBitmapHandler a;
+}
+
+void unreadVariable_wxGraphicsGradientStops()
+{
+    // cppcheck-suppress unusedVariable
+    wxGraphicsGradientStops a;
+    // cppcheck-suppress unreadVariable
+    wxGraphicsGradientStops b(wxTransparentColour);
+    // cppcheck-suppress unreadVariable
+    wxGraphicsGradientStops c(wxTransparentColour, wxTransparentColour);
+}
+
+void unreadVariable_wxGraphicsGradientStop()
+{
+    // cppcheck-suppress unusedVariable
+    wxGraphicsGradientStop a;
+    // cppcheck-suppress unreadVariable
+    wxGraphicsGradientStop b(wxTransparentColour);
+    // cppcheck-suppress unreadVariable
+    wxGraphicsGradientStop c(wxTransparentColour, 0.42);
+}
+
+void unusedVariable_wxFontMetrics()
+{
+    // cppcheck-suppress unusedVariable
+    wxFontMetrics a;
+}
+
 void unusedVariable_wxIconLocation()
 {
     // cppcheck-suppress unusedVariable