1 files changed, 8 insertions, 0 deletions
diff --git a/src/libsyntax/ast/tests.rs b/src/libsyntax/ast/tests.rs
new file mode 100644
index 00000000000..7558e9cc3a3
--- /dev/null
+++ b/src/libsyntax/ast/tests.rs
@@ -0,0 +1,8 @@
+use super::*;
+
+// Are ASTs encodable?
+#[test]
+fn check_asts_encodable() {
+    fn assert_encodable<T: rustc_serialize::Encodable>() {}
+    assert_encodable::<Crate>();
+}