1 files changed, 21 insertions, 0 deletions
diff --git a/python/tidy/servo_tidy_tests/ban.rs b/python/tidy/servo_tidy_tests/ban.rs
new file mode 100644
index 00000000000..f828053d289
--- /dev/null
+++ b/python/tidy/servo_tidy_tests/ban.rs
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#![feature(plugin)]
+#![plugin(script_plugins)]
+
+extern crate js;
+
+use js::jsval::JSVal;
+use std::cell::Cell;
+use std::cell::UnsafeCell;
+
+struct Foo {
+    bar: Cell<JSVal>,
+    //~^ ERROR Banned type Cell<JSVal> detected. Use MutJS<JSVal> instead
+    foo: UnsafeCell<JSVal>
+    //~^ NOT AN ERROR
+}
+
+fn main() {}