diff --git a/tests/test_executors.py b/tests/test_executors.py
index e08cac6..1d0b3cb 100644
--- a/tests/test_executors.py
+++ b/tests/test_executors.py
@@ -21,6 +21,7 @@ class _TestExecutors:
                     coros.append(self.loop.run_in_executor(pool, fib, i))
                 res = await asyncio.gather(*coros, loop=self.loop)
             self.assertEqual(res, fib10)
+            await asyncio.sleep(0.01)
 
         fib10 = [fib(i) for i in range(10)]
         self.loop.run_until_complete(run())