diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml
index 9880c5c..d8fe934 100644
--- a/.woodpecker/test.yml
+++ b/.woodpecker/test.yml
@@ -5,6 +5,8 @@ when:
 steps:
   - name: build
     image: wordpressdevelop/phpunit
+    environment:
+      WP_TESTS_PHPUNIT_POLYFILLS_PATH: vendor/yoast/phpunit-polyfills
     commands:
       - apt-get clean
       - apt-get -yqq update