diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index db2d028..3320453 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -28,7 +28,7 @@ jobs:
       with:
         php-version: ${{ matrix.php-versions }}
         extensions: mbstring
-        ini-values: error_reporting=-1, display_errors=On, log_errors_max_len=0
+        ini-values: zend.assertions=1, error_reporting=-1, display_errors=On, log_errors_max_len=0
         coverage: none
         tools: none