diff --git a/serde_codegen/src/lib.rs b/serde_codegen/src/lib.rs
index 83e768a6..a2699c78 100644
--- a/serde_codegen/src/lib.rs
+++ b/serde_codegen/src/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(feature = "nightly", plugin(clippy))]
+#![cfg_attr(feature = "nightly-testing", plugin(clippy))]
 #![cfg_attr(feature = "nightly", allow(used_underscore_binding))]
 #![cfg_attr(not(feature = "with-syntex"), feature(rustc_private, plugin))]
 #![cfg_attr(not(feature = "with-syntex"), plugin(quasi_macros))]