diff --git a/evm/src/cpu/kernel/tests/hash.rs b/evm/src/cpu/kernel/tests/hash.rs
index 1e578cc2..5538c909 100644
--- a/evm/src/cpu/kernel/tests/hash.rs
+++ b/evm/src/cpu/kernel/tests/hash.rs
@@ -1,5 +1,5 @@
 use anyhow::Result;
-use blake2::Blake2b512;
+// use blake2::Blake2b512;
 use ethereum_types::{U256, U512};
 use rand::{thread_rng, Rng};
 use ripemd::{Digest, Ripemd160};