diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 92b4e9e0..6f0f5e91 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ "5.6", "7.0", "7.1", "7.2", "7.3", "7.4", "8.0" ]
+        php: [ "5.6", "7.0", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1"]
     name: PHP ${{matrix.php }} Unit Test
     steps:
       - uses: actions/checkout@v2