diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index bb7f70ca3..d4e8e5ce6 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -4723,6 +4723,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
+      <minsize type="argvalue" arg="2"/>
     </arg>
     <arg nr="2" direction="in">
       <not-uninit/>
diff --git a/test/cfg/posix.c b/test/cfg/posix.c
index 49775acce..f5a79b346 100644
--- a/test/cfg/posix.c
+++ b/test/cfg/posix.c
@@ -48,6 +48,15 @@ int nullPointer_wcsnlen(const wchar_t *s, size_t n)
     return wcsnlen(s, n);
 }
 
+size_t bufferAccessOutOfBounds_wcsnlen(const wchar_t *s, size_t maxlen)
+{
+    wchar_t buf[2]={L'4',L'2'};
+    size_t len = wcsnlen(buf,2);
+    // TODO cppcheck-suppress bufferAccessOutOfBounds
+    len+=wcsnlen(buf,3);
+    return len;
+}
+
 int nullPointer_gethostname(char *s, size_t n)
 {
     // cppcheck-suppress nullPointer
@@ -272,6 +281,23 @@ void bufferAccessOutOfBounds_bzero(void *s, size_t n)
     bzero(s,n);
 }
 
+size_t bufferAccessOutOfBounds_strnlen(const char *s, size_t maxlen)
+{
+    char buf[2]={'4','2'};
+    size_t len = strnlen(buf,2);
+    // cppcheck-suppress bufferAccessOutOfBounds
+    len+=strnlen(buf,3);
+    return len;
+}
+
+size_t nullPointer_strnlen(const char *s, size_t maxlen)
+{
+    // No warning shall be shown:
+    (void) strnlen(s, maxlen);
+    // cppcheck-suppress nullPointer
+    return strnlen(NULL, maxlen);
+}
+
 char * nullPointer_stpcpy(char *src, char *dest)
 {
     // No warning shall be shown: