diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 39145a3..e9ff07e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -93,7 +93,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          ini-values: error_reporting=E_ALL, display_errors=On
+          ini-values: error_reporting=E_ALL, display_errors=On, display_startup_errors=On
           coverage: none
 
       - name: "Conditionally require specific versions of the polyfills (PHP 5.4)"