diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 467be3c..a67e699 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version:
+          - '3.6'
           - '3.7'
           - '3.8'
           - '3.9'