diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 17646c93e8..6861f97f39 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -215,7 +215,7 @@ stop_normal:
 .deployment_test: &deployment_test
   stage: test
   interruptible: true
-  image: python:3.9-alpine
+  image: python:3.7-alpine
   only:
     refs:
       - branches
diff --git a/test/Dockerfile b/test/Dockerfile
index 55f10e18f3..12ae96f70c 100644
--- a/test/Dockerfile
+++ b/test/Dockerfile
@@ -1,3 +1,3 @@
-FROM python:3.9-alpine
+FROM python:3.7-alpine
 RUN apk add gcc musl-dev bash
 RUN pip install aiohttp aiofiles aiohttp-retry