diff --git a/tests/test_invoke.py b/tests/test_invoke.py
index 1e420030..4298e3a9 100644
--- a/tests/test_invoke.py
+++ b/tests/test_invoke.py
@@ -614,8 +614,10 @@ class SM(StateChart):
             done_invoke_loading = loading.to(ready)
 
         sm = await sm_runner.start(SM)
-        await sm_runner.sleep(0.15)
-        await sm_runner.processing_loop(sm)
+        deadline = time.monotonic() + 2.0
+        while "ready" not in sm.configuration_values and time.monotonic() < deadline:
+            await sm_runner.sleep(0.02)
+            await sm_runner.processing_loop(sm)
 
         assert "ready" in sm.configuration_values
         # All invocations should be terminated by now