diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2d1a3a6488..7120233f24 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,10 +11,9 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          #- {name: Linux, python: '3.9', os: ubuntu-latest, tox: py39}
-          #- {name: Windows, python: '3.9', os: windows-latest, tox: py39}
-          #- {name: Mac, python: '3.9', os: macos-latest, tox: py39}
-          - {name: '3.9', python: '3.9', os: ubuntu-latest, tox: py39}
+          - {name: Linux, python: '3.9', os: ubuntu-latest, tox: py39}
+          - {name: Windows, python: '3.9', os: windows-latest, tox: py39}
+          - {name: Mac, python: '3.9', os: macos-latest, tox: py39}
           - {name: '3.8', python: '3.8', os: ubuntu-latest, tox: py38}
           - {name: '3.7', python: '3.7', os: ubuntu-latest, tox: py37}
           - {name: '3.6', python: '3.6', os: ubuntu-latest, tox: py36}