diff --git a/tests/injection.rs b/tests/injection.rs
index 70a3fce..0b781bd 100644
--- a/tests/injection.rs
+++ b/tests/injection.rs
@@ -630,7 +630,7 @@ async fn the_audio_signature_field_cannot_carry_arbitrary_bytes() {
             status,
             StatusCode::BAD_REQUEST,
             "signature {:?} should be rejected: {body}",
-            &sig.chars().take(40).collect::<String>()
+            sig.chars().take(40).collect::<String>()
         );
     }
 }