diff --git a/test/good/clocks.ept b/test/good/clocks.ept
new file mode 100644
index 0000000..e01d23d
--- /dev/null
+++ b/test/good/clocks.ept
@@ -0,0 +1,4 @@
+node f(x:bool) returns (y:bool)
+let
+  y = x when x
+tel