diff --git a/src/lib.rs b/src/lib.rs
index ab6cb6a..45d96af 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -114,23 +114,22 @@
 extern crate arrayref;
 extern crate sha2;
 extern crate curve25519_dalek;
+extern crate generic_array;
+extern crate digest;
 
 #[cfg(feature = "std")]
 extern crate rand;
 
-extern crate generic_array;
-extern crate digest;
-
 #[cfg(test)]
 #[macro_use]
 extern crate std;
 
-#[cfg(all(test, feature = "bench"))]
-extern crate test;
-
 #[cfg(test)]
 extern crate rustc_serialize;
 
+#[cfg(all(test, feature = "bench"))]
+extern crate test;
+
 #[cfg(all(test, feature = "bench"))]
 extern crate blake2;