diff --git a/src/cli/run/runner.test.ts b/src/cli/run/runner.test.ts
index b7d53294..03f1b6e1 100644
--- a/src/cli/run/runner.test.ts
+++ b/src/cli/run/runner.test.ts
@@ -117,7 +117,8 @@ describe("waitForEventProcessorShutdown", () => {
       //#then
       const elapsed = performance.now() - start
       expect(elapsed).toBeGreaterThanOrEqual(timeoutMs)
-      expect(spy).toHaveBeenCalledWith(
+      const callArgs = spy.mock.calls.flat().join("")
+      expect(callArgs).toContain(
         `[run] Event stream did not close within ${timeoutMs}ms after abort; continuing shutdown.`,
       )
     } finally {