diff --git a/src/lib.rs b/src/lib.rs
index 4aa107b..5d01ca1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -31,7 +31,7 @@
 #![cfg_attr(nightly, feature(drain_filter))] 
 #![cfg_attr(nightly, feature(never_type))] 
 
-#[cfg(nightly)] extern crate test;
+#[cfg(all(nightly, test))] extern crate test;
 extern crate alloc;
 
 const MAX: usize = 256;