diff --git a/.github/workflows/quicktest.yml b/.github/workflows/quicktest.yml
index d39fd3e1..355bd320 100644
--- a/.github/workflows/quicktest.yml
+++ b/.github/workflows/quicktest.yml
@@ -38,7 +38,7 @@ jobs:
           php-version: ${{ matrix.php }}
           # With stable PHPCS dependencies, allow for PHP deprecation notices.
           # Unit tests don't need to fail on those for stable releases where those issues won't get fixed anymore.
-          ini-values: error_reporting=-1, display_errors=On
+          ini-values: error_reporting=-1, display_errors=On, display_startup_errors=On
           coverage:  ${{ github.ref_name == 'develop' && 'xdebug' || 'none' }}
 
       - name: Enable creation of `composer.lock` file
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 11151ebb..33d5e713 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -91,9 +91,9 @@ jobs:
         id: set_ini
         run: |
           if [ "${{ matrix.dependencies }}" != "dev" ]; then
-            echo 'PHP_INI=error_reporting=E_ALL & ~E_DEPRECATED, display_errors=On' >> "$GITHUB_OUTPUT"
+            echo 'PHP_INI=error_reporting=E_ALL & ~E_DEPRECATED, display_errors=On, display_startup_errors=On' >> "$GITHUB_OUTPUT"
           else
-            echo 'PHP_INI=error_reporting=-1, display_errors=On' >> "$GITHUB_OUTPUT"
+            echo 'PHP_INI=error_reporting=-1, display_errors=On, display_startup_errors=On' >> "$GITHUB_OUTPUT"
           fi
 
       - name: Set up PHP