diff --git a/examples/tests.modal b/examples/tests.modal
index 571ea74..9d6d20a 100644
--- a/examples/tests.modal
+++ b/examples/tests.modal
@@ -41,6 +41,12 @@ compare (abc abc abc) (#t) test
 
 replace-empty abc = ?y test
 
+?(?-) (Guards setups)
+
+<> (join (String ?x) (String ?y)) ((?x ?y) =)
+
+join (String abc) (String def) (abc def) test
+
 ?(?-) (Lambdas)
 
 ?((?x) ((?x ?x) =)) abc (abc abc) test