diff --git a/test/cfg/runtests.sh b/test/cfg/runtests.sh
index 8b0d8b1ed..6923e9da8 100755
--- a/test/cfg/runtests.sh
+++ b/test/cfg/runtests.sh
@@ -29,7 +29,7 @@ CPPCHECK_OPT='--check-library --platform=unix64 --enable=information --enable=st
 CXX=g++
 CXX_OPT='-fsyntax-only -std=c++0x -Wno-format -Wno-format-security -Wno-deprecated-declarations'
 CC=gcc
-CC_OPT='-Wno-format -Wno-nonnull -Wno-implicit-function-declaration -Wno-deprecated-declarations -Wno-format-security -Wno-nonnull -fsyntax-only'
+CC_OPT='-Wno-format -Wno-stringop-overread -Wno-nonnull -Wno-implicit-function-declaration -Wno-deprecated-declarations -Wno-format-security -Wno-nonnull -fsyntax-only'
 
 function get_pkg_config_cflags {
     set +e
diff --git a/test/cfg/std.c b/test/cfg/std.c
index fa722f6dc..78c1c1108 100644
--- a/test/cfg/std.c
+++ b/test/cfg/std.c
@@ -29,6 +29,16 @@
 #include <inttypes.h>
 #include <float.h>
 
+int invalidFunctionArgStr_strcpn(void)
+{
+   const char str1[] = "ABCDEF49620910";
+   const char str2[] = "42";
+   const char pattern[3] = { -42, -43, -44 };
+   // cppcheck-suppress invalidFunctionArgStr
+   (void) strcspn(str1, pattern);
+   return strcspn(str1, str2);
+}
+
 void invalidFunctionArgStr_strncat(void)
 {
     char str1[20];