diff --git a/src/chacha20.ts b/src/chacha20.ts
index 6e578a9..9ce7da2 100644
--- a/src/chacha20.ts
+++ b/src/chacha20.ts
@@ -4,7 +4,6 @@ import {
     Field,
     UInt8,
 } from 'o1js';
-import { toHexString } from './chacha20.test';
 
 export { ChaChaState, chacha20Block };