diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6ca3706..ecad5cf 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,6 +29,11 @@ jobs:
           override: true
           components: rustfmt, clippy
 
+      - name: install php
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.1
+
       - name: cache
         id: cache
         uses: actions/cache@v3