diff --git a/tests/worker/test_workflow.py b/tests/worker/test_workflow.py
index d13debf12..ff9ba8a02 100644
--- a/tests/worker/test_workflow.py
+++ b/tests/worker/test_workflow.py
@@ -2946,12 +2946,21 @@ async def waiting_signal() -> bool:
             task_queue=task_queue,
         )
 
+        # Need to wait until it has gotten halfway through, otherwise the post_patch workflow may never complete
+        async def waiting_signal() -> bool:
+            return await post_patch_handle.query(
+                PatchMemoizedWorkflowPatched.waiting_signal
+            )
+
+        await assert_eq_eventually(True, waiting_signal)
+
         # Send signal to both and check results
         await pre_patch_handle.signal(PatchMemoizedWorkflowUnpatched.signal)
         await post_patch_handle.signal(PatchMemoizedWorkflowPatched.signal)
 
         # Confirm expected values
         assert ["some-value"] == await pre_patch_handle.result()
+
         assert [
             "pre-patch",
             "some-value",