diff --git a/test/twine.c b/test/twine.c
index 98fae52..0af21b4 100644
--- a/test/twine.c
+++ b/test/twine.c
@@ -34,6 +34,7 @@ void twine_test_cmp(void) {
   CU_ASSERT_TRUE(gargoyle_cmp("", "", 100, 0));
   CU_ASSERT_TRUE(gargoyle_cmp("", "", 100, GARGOYLE_FLG_FLXBL));
   CU_ASSERT_FALSE(gargoyle_cmp("", "w", 1, 0));
+  CU_ASSERT_FALSE(gargoyle_cmp("w", "", 1, 0));
   CU_ASSERT_TRUE(gargoyle_cmp("spooky", "spooky", 42, 0));
   CU_ASSERT_FALSE(gargoyle_cmp("thunderfury", "blessed blade of the windseeker", 11, 0));
   CU_ASSERT_FALSE(gargoyle_cmp("thunderfury", "blessed blade of the windseeker", 31, 0));