diff --git a/test/cfg/gnu.c b/test/cfg/gnu.c
new file mode 100644
index 000000000..f21711dbb
--- /dev/null
+++ b/test/cfg/gnu.c
@@ -0,0 +1,22 @@
+
+// Test library configuration for gnu.cfg
+//
+// Usage:
+// $ cppcheck --check-library --library=gnu --enable=information --enable=style --error-exitcode=1 --inline-suppr test/cfg/gnu.c
+// =>
+// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
+//
+
+#include <string.h>
+#include <unistd.h>
+
+void leakReturnValNotUsed() {
+   // cppcheck-suppress unreadVariable
+   char* ptr = strdupa("test");
+   // cppcheck-suppress ignoredReturnValue
+   strdupa("test");
+   // cppcheck-suppress unreadVariable
+   char* ptr2 = strndupa("test", 1);
+   // cppcheck-suppress ignoredReturnValue
+   strndupa("test", 1);
+}