diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c6aee051..4b32d726 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,7 +12,7 @@ jobs:
         php: ['7.3', '7.4', '8.0', '8.1']
         dependency-version: [prefer-lowest, prefer-stable]
         include:
-          - os: '8.1'
+          - php: '8.1'
             continue-on-error: true
 
     name: PHP ${{ matrix.php }} - ${{ matrix.os }} - ${{ matrix.dependency-version }}