diff --git a/compiler/testData/diagnostics/tests/cast/IsErasedAllowSameParameterParameter.jet b/compiler/testData/diagnostics/tests/cast/IsErasedAllowSameParameterParameter.jet
new file mode 100644
index 00000000000..6d6e453858b
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/cast/IsErasedAllowSameParameterParameter.jet
@@ -0,0 +1,7 @@
+// +JDK
+
+import java.util.Collection;
+import java.util.List;
+
+fun ff<T>(l: Collection<T>) = l is List<T>
+