diff --git a/crates/matrix-sdk-crypto/src/machine/tests/mod.rs b/crates/matrix-sdk-crypto/src/machine/tests/mod.rs
index d71f6f65722..21dabf2023a 100644
--- a/crates/matrix-sdk-crypto/src/machine/tests/mod.rs
+++ b/crates/matrix-sdk-crypto/src/machine/tests/mod.rs
@@ -682,6 +682,7 @@ async fn test_withheld_unverified() {
         bob.try_decrypt_room_event(&room_event, room_id, &decryption_settings).await.unwrap();
     assert_let!(RoomEventDecryptionResult::UnableToDecrypt(utd_info) = decrypt_result);
     assert!(utd_info.session_id.is_some());
+    assert_eq!(utd_info.reason, UnableToDecryptReason::MissingMegolmSession);
 }
 
 /// Test what happens when we feed an unencrypted event into the decryption