diff --git a/src/turnkey.rs b/src/turnkey.rs
index 753acf0..9cb9573 100644
--- a/src/turnkey.rs
+++ b/src/turnkey.rs
@@ -325,6 +325,14 @@ mod tests {
         }
     }
 
+    #[test]
+    fn classifier_service_fallback() {
+        assert!(matches!(
+            classify_turnkey_error("unrecognized issue"),
+            TurnkeyErrorKind::Service
+        ));
+    }
+
     #[test]
     fn contains_nocase_works_without_alloc() {
         assert!(contains_nocase("ABCdef", "cDe"));