diff --git a/scenario/known-issues/cbase-is-not-class.rb b/scenario/known-issues/cbase-is-not-class.rb
new file mode 100644
index 00000000..e30ccbcb
--- /dev/null
+++ b/scenario/known-issues/cbase-is-not-class.rb
@@ -0,0 +1,7 @@
+## update: test.rb
+Foo = 1
+
+class Foo::Bar # we want to warn that cbase is not a module
+end
+
+## diagnostics