diff --git a/tests/lean/run/csimpAttrFn.lean b/tests/lean/run/csimpAttrFn.lean
new file mode 100644
index 0000000000..382d4145ce
--- /dev/null
+++ b/tests/lean/run/csimpAttrFn.lean
@@ -0,0 +1,8 @@
+import Lean
+
+open Lean
+open Lean.Compiler
+
+#eval (do assert! hasCSimpAttribute (← getEnv) ``List.map_eq_mapTR : MetaM Unit)
+#eval (do assert! hasCSimpAttribute (← getEnv) ``List.append_eq_appendTR : MetaM Unit)
+#eval (do assert! !hasCSimpAttribute (← getEnv) ``List.append : MetaM Unit)