diff --git a/test/cases/no declspec.c b/test/cases/no declspec.c
index 0b4c36d0..720a2c66 100644
--- a/test/cases/no declspec.c	
+++ b/test/cases/no declspec.c	
@@ -1,4 +1,12 @@
 __declspec(align(4)) int foo;
 
+#if __has_declspec_attribute(noreturn)
+#error "__has_declspec_attribute macro should not work without -fdeclspec"
+#endif
+
+#if __has_declspec_attribute(x)
+#error "__has_declspec_attribute macro should not work without -fdeclspec"
+#endif
+
 #define EXPECTED_ERRORS \
     "no declspec.c:1:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes" \