diff --git a/backend/internal/service/gateway_request_test.go b/backend/internal/service/gateway_request_test.go
index 68ab6ceb60..07b5b37ff1 100644
--- a/backend/internal/service/gateway_request_test.go
+++ b/backend/internal/service/gateway_request_test.go
@@ -401,7 +401,7 @@ func TestFilterThinkingBlocksForRetry_DropsThinkingBlockWithEmptyContent(t *test
 		]
 	}`)
 
-	out := FilterThinkingBlocksForRetry(input)
+	out := FilterThinkingBlocksForRetry(input, "claude-sonnet-4-5")
 
 	var req map[string]any
 	require.NoError(t, json.Unmarshal(out, &req))