diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 56fb37c5c..10a07162c 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -3805,6 +3805,31 @@ HFONT CreateFont(
       <not-uninit/>
     </arg>
   </function>
+  <!-- errno_t _strncpy_s_l(char *strDest, size_t numberOfElements, const char *strSource, size_t count, _locale_t locale); -->
+  <function name="_strncpy_s_l">
+    <noreturn>false</noreturn>
+    <returnValue type="errno_t"/>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-null/>
+      <minsize type="argvalue" arg="2"/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="3">
+      <not-null/>
+      <not-uninit/>
+      <minsize type="argvalue" arg="4"/>
+    </arg>
+    <arg nr="4">
+      <not-uninit/>
+    </arg>
+    <arg nr="5">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- errno_t _localtime32_s( struct tm* _tm, const __time32_t *time);
        errno_t _localtime64_s( struct tm* _tm, const __time64_t *time); -->
   <function name="_localtime32_s,_localtime64_s">
diff --git a/test/cfg/windows.cpp b/test/cfg/windows.cpp
index 2d5b610ab..68e36a511 100644
--- a/test/cfg/windows.cpp
+++ b/test/cfg/windows.cpp
@@ -823,3 +823,38 @@ error_t nullPointer_mbscat_s(unsigned char *strDestination, size_t numberOfEleme
     // no warning shall be shown for
     return _mbscat_s(strDestination, numberOfElements, strSource);
 }
+
+// errno_t _strncpy_s_l(char *strDest, size_t numberOfElements, const char *strSource, size_t count, _locale_t locale);
+error_t uninitvar__strncpy_s_l(char *strDest, size_t numberOfElements, const char *strSource, size_t count, _locale_t locale)
+{
+    size_t uninit_numberOfElements;
+    const char *uninit_strSource;
+    size_t uninit_count;
+    _locale_t uninit_locale;
+
+    // cppcheck-suppress uninitvar
+    (void)_strncpy_s_l(strDest, uninit_numberOfElements, strSource, count, locale);
+    // cppcheck-suppress uninitvar
+    (void)_strncpy_s_l(strDest, numberOfElements, uninit_strSource, count, locale);
+    // cppcheck-suppress uninitvar
+    (void)_strncpy_s_l(strDest, numberOfElements, strSource, count, locale);
+    // cppcheck-suppress uninitvar
+    (void)_strncpy_s_l(strDest, numberOfElements, strSource, uninit_count, locale);
+    // cppcheck-suppress uninitvar
+    (void)_strncpy_s_l(strDest, numberOfElements, strSource, uninit_count, uninit_locale);
+
+    // no warning shall be shown for
+    return _strncpy_s_l(strDest, numberOfElements, strSource, count, locale);
+}
+
+// errno_t _strncpy_s_l(char *strDest, size_t numberOfElements, const char *strSource, size_t count, _locale_t locale);
+error_t nullPointer__strncpy_s_l(char *strDest, size_t numberOfElements, const char *strSource, size_t count, _locale_t locale)
+{
+    // cppcheck-suppress nullPointer
+    (void)_strncpy_s_l(0, numberOfElements, strSource, count, locale);
+    // cppcheck-suppress nullPointer
+    (void)_strncpy_s_l(strDest, numberOfElements, 0, count, locale);
+
+    // no warning shall be shown for
+    return _strncpy_s_l(strDest, numberOfElements, strSource, count, locale);
+}