diff --git a/requirements_test.txt b/requirements_test.txt
index 5f1a258a3..d9b6c8163 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,4 +1,5 @@
 pytest
+pytest-asyncio <= 0.16
 pytest-mock
 pytest-testdox>=1.1.1
 pytest-cov