diff --git a/eax/tests/aes128eax.rs b/eax/tests/aes128eax.rs
index df8a3857..656648ae 100644
--- a/eax/tests/aes128eax.rs
+++ b/eax/tests/aes128eax.rs
@@ -1,5 +1,6 @@
 //! Test vectors from Appendix G:
 //! https://web.cs.ucdavis.edu/~rogaway/papers/eax.pdf
+#![cfg(feature = "alloc")]
 
 use aes::Aes128;
 use eax::Eax;