diff --git a/.github/workflows/pr-actions.yml b/.github/workflows/pr-actions.yml
index d0b2b52e..9eae0762 100644
--- a/.github/workflows/pr-actions.yml
+++ b/.github/workflows/pr-actions.yml
@@ -37,7 +37,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '2.7', '3.4', '3.5', '3.6', '3.7', '3.8','3.9']
+        python-version: [ '2.7', '3.4', '3.5', '3.6', '3.7', '3.8', '3.9']
         pika-version: ['0.13.1', '1.1.0']
         # Can't use ubuntu-latest until Python 3.4 has Ubuntu 20.X install options in setup-python@v2
         os: ['ubuntu-18.04']