diff --git a/matrix_sdk_crypto/src/verification/sas.rs b/matrix_sdk_crypto/src/verification/sas.rs
index 5c42453e..f101f1a5 100644
--- a/matrix_sdk_crypto/src/verification/sas.rs
+++ b/matrix_sdk_crypto/src/verification/sas.rs
@@ -914,9 +914,9 @@ mod test {
         let bob_device = Device::from_account(&bob).await;
 
         let (alice, content) = Sas::start(alice, bob_device);
-        let mut event = wrap_to_device_event(alice.user_id(), content);
+        let event = wrap_to_device_event(alice.user_id(), content);
 
-        let bob = Sas::from_start_event(bob, alice_device, &mut event);
+        let bob = Sas::from_start_event(bob, alice_device, &event);
         let event = wrap_to_device_event(bob.user_id(), bob.accept().unwrap());
 
         let content = alice.receive_event(&mut AnyToDeviceEvent::KeyVerificationAccept(event));