diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index b09e70291..8fd1312c4 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -1378,9 +1378,7 @@
     <leak-ignore/>
     <returnValue type="int"/>
     <use-retval/>
-    <arg nr="1">
-      <not-uninit/>
-    </arg>
+    <arg nr="1"/>
   </function>
   <!-- double wxAtof(const wxString & str)-->
   <function name="wxAtof">
@@ -1388,9 +1386,7 @@
     <leak-ignore/>
     <returnValue type="double"/>
     <use-retval/>
-    <arg nr="1">
-      <not-uninit/>
-    </arg>
+    <arg nr="1"/>
   </function>
   <!-- long wxAtol(const wxString & str)-->
   <function name="wxAtol">
@@ -1398,8 +1394,34 @@
     <leak-ignore/>
     <returnValue type="long"/>
     <use-retval/>
+    <arg nr="1"/>
+  </function>
+  <!-- bool wxString::ToDouble(double * val) const -->
+  <!-- bool wxString::ToCDouble(double * val) const -->
+  <function name="wxString::ToDouble,wxString::ToCDouble">
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="bool"/>
     <arg nr="1">
+      <not-null/>
+    </arg>
+  </function>
+  <!-- bool wxString::ToLong(long * val, int base = 10) const -->
+  <!-- bool wxString::ToCLong(long * val, int base = 10) const -->
+  <!-- bool wxString::ToLongLong(long long * val, int base = 10) const -->
+  <!-- bool wxString::ToULong(unsigned long * val, int base = 10) const -->
+  <!-- bool wxString::ToCULong(unsigned long * val, int base = 10) const -->
+  <!-- bool wxString::ToULongLong(unsigned long long * val, int base = 10) const -->
+  <function name="wxString::ToLong,wxString::ToCLong,wxString::ToLongLong,wxString::ToULong,wxString::ToCULong,wxString::ToULongLong">
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="bool"/>
+    <arg nr="1">
+      <not-null/>
+    </arg>
+    <arg nr="2" default="10">
       <not-uninit/>
+      <valid>0,2:36</valid>
     </arg>
   </function>
   <define name="DECLARE_EVENT_TABLE()" value="wxDECLARE_EVENT_TABLE()"/>
diff --git a/test/cfg/runtests.sh b/test/cfg/runtests.sh
index b86a11df5..bdc6175d5 100755
--- a/test/cfg/runtests.sh
+++ b/test/cfg/runtests.sh
@@ -11,7 +11,7 @@ else # assume we are in repo root
 fi
 
 # Cppcheck options
-CPPCHECK_OPT='--check-library --enable=information --enable=style --error-exitcode=1 --suppress=missingIncludeSystem --inline-suppr --template="{file}:{line}:{severity}:{id}:{message}"'
+CPPCHECK_OPT='--check-library --enable=information --enable=style --error-exitcode=-1 --suppress=missingIncludeSystem --inline-suppr --template="{file}:{line}:{severity}:{id}:{message}"'
 
 # Compiler settings
 CXX=g++
diff --git a/test/cfg/wxwidgets.cpp b/test/cfg/wxwidgets.cpp
index a9555cb2a..54ad0b5e6 100644
--- a/test/cfg/wxwidgets.cpp
+++ b/test/cfg/wxwidgets.cpp
@@ -44,12 +44,39 @@ void validGuiCode()
 }
 #endif
 
-void nullPointer(void)
+void nullPointer(const wxString &str)
 {
     // cppcheck-suppress nullPointer
     wxLogGeneric(wxLOG_Message, (char*)NULL);
     // cppcheck-suppress nullPointer
     wxLogMessage((char*)NULL);
+
+    double *doublePtr = NULL;
+    // cppcheck-suppress nullPointer
+    (void)str.ToDouble(doublePtr);
+    // cppcheck-suppress nullPointer
+    (void)str.ToCDouble(doublePtr);
+
+    long * longPtr = NULL;
+    // cppcheck-suppress nullPointer
+    (void)str.ToLong(longPtr);
+    // cppcheck-suppress nullPointer
+    (void)str.ToCLong(longPtr);
+
+    unsigned long * ulongPtr = NULL;
+    // cppcheck-suppress nullPointer
+    (void)str.ToULong(ulongPtr);
+    // cppcheck-suppress nullPointer
+    (void)str.ToCULong(ulongPtr);
+
+    long long * longLongPtr = NULL;
+    // cppcheck-suppress nullPointer
+    (void)str.ToLongLong(longLongPtr);
+
+    unsigned long long * ulongLongPtr = NULL;
+    // cppcheck-suppress nullPointer
+    (void)str.ToULongLong(ulongLongPtr);
+
 }
 
 void ignoredReturnValue(const wxString &s)
@@ -64,7 +91,7 @@ void ignoredReturnValue(const wxString &s)
     wxAtof(s);
 }
 
-void invalidFunctionArg(void)
+void invalidFunctionArg(const wxString &str)
 {
 #if wxUSE_SPINCTRL==1
     extern wxSpinCtrl spinCtrlInstance;
@@ -73,6 +100,14 @@ void invalidFunctionArg(void)
     // cppcheck-suppress invalidFunctionArg
     spinCtrlInstance.SetBase(5);
 #endif
+
+    long l;
+    // cppcheck-suppress invalidFunctionArg
+    (void)str.ToLong(&l, -1);
+    // cppcheck-suppress invalidFunctionArg
+    (void)str.ToLong(&l, 1);
+    // cppcheck-suppress invalidFunctionArg
+    (void)str.ToLong(&l, 37);
 }
 
 void uninitvar(void)
@@ -80,19 +115,35 @@ void uninitvar(void)
     wxLogLevel logLevelUninit;
     char cBufUninit[10];
     char *pcUninit;
-    wxString emptyString;
     // cppcheck-suppress uninitvar
     wxLogGeneric(logLevelUninit, "test");
     // cppcheck-suppress uninitvar
     wxLogMessage(cBufUninit);
     // cppcheck-suppress uninitvar
     wxLogMessage(pcUninit);
+}
+
+void uninitvar_wxString_NumberConversion(const wxString &str, const int numberBase)
+{
+    int uninitInteger;
+    long l;
+    long long ll;
+    unsigned long ul;
+    unsigned long long ull;
+
     // cppcheck-suppress uninitvar
-    (void)wxAtoi(emptyString);
+    (void)str.ToLong(&l, uninitInteger);
     // cppcheck-suppress uninitvar
-    (void)wxAtol(emptyString);
+    (void)str.ToLongLong(&ll, uninitInteger);
     // cppcheck-suppress uninitvar
-    (void)wxAtof(emptyString);
+    (void)str.ToULong(&ul, uninitInteger);
+    // cppcheck-suppress uninitvar
+    (void)str.ToULongLong(&ull, uninitInteger);
+
+    // cppcheck-suppress uninitvar
+    (void)str.ToCLong(&l, uninitInteger);
+    // cppcheck-suppress uninitvar
+    (void)str.ToCULong(&ul, uninitInteger);
 }
 
 void uninitvar_SetMenuBar(wxFrame * const framePtr, wxMenuBar * const menuBarPtr)