diff --git a/test/rustint/core_test.clj b/test/rustint/core_test.clj
index 804be2a..71d0a1b 100644
--- a/test/rustint/core_test.clj
+++ b/test/rustint/core_test.clj
@@ -121,3 +121,9 @@
     (is (= (compatibles? 'char 'a) false))
   )
 )
+
+(deftest compatibles-test11
+  (testing "Test 11 compatibles?"
+    (is (= (compatibles? 'char ['a]) true))
+  )
+)