diff --git a/tests/lean/run/kernel2.lean b/tests/lean/run/kernel2.lean
index eea7c549c0..d71c6af4b0 100644
--- a/tests/lean/run/kernel2.lean
+++ b/tests/lean/run/kernel2.lean
@@ -51,3 +51,7 @@ def c9  : String := "hello" ++ "world"
 def c10 : String := "helloworld"
 
 #eval checkDefEq `c9 `c10
+
+def c11 : Bool := decide ('a' = 'b')
+
+#eval whnf `c11