diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 161206c4..f3de75af 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,8 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        # os: [ubuntu-latest, windows-latest, macos-11.0]
-        os: [macos-11.0]
+        os: [ubuntu-latest, windows-latest, macos-11.0]
         python_version: ['3.7']
     timeout-minutes: 180
     steps: