diff --git a/.github/workflows/asciinema.yml b/.github/workflows/asciinema.yml
index 3933e98..2bfae0a 100644
--- a/.github/workflows/asciinema.yml
+++ b/.github/workflows/asciinema.yml
@@ -33,6 +33,7 @@ jobs:
     strategy:
       matrix:
         python:
+          - "3.6"
           - "3.7"
           - "3.8"
           - "3.9"
diff --git a/tests/distros/Dockerfile.centos b/tests/distros/Dockerfile.centos
index 1a7b629..bc4fd7e 100644
--- a/tests/distros/Dockerfile.centos
+++ b/tests/distros/Dockerfile.centos
@@ -1,8 +1,8 @@
 # syntax=docker/dockerfile:1.3
 
-FROM docker.io/library/centos:8
+FROM docker.io/library/centos:7
 
-RUN yum install -y epel-release && yum install -y make python39 && yum clean all
+RUN yum install -y epel-release && yum install -y make python36 && yum clean all
 
 WORKDIR /usr/src/app