Try this

Author: jrfnl

.github/workflows/quicktest.yml

@@ -99,9 +99,9 @@ jobs:
 
         include:
           - php: '7.2'
-            phpcs_version: '4.0.0'
+            phpcs_version: '4.x-dev'
           - php: 'latest'
-            phpcs_version: 'dev-4.x'
+            phpcs_version: '4.x-dev'
 
     name: "QTest: PHP ${{ matrix.php }} - PHPCS ${{ matrix.phpcs_version }}"
 
@@ -114,7 +114,7 @@ jobs:
       - name: Setup ini config
         id: set_ini
         run: |
-          if [ "${{ startsWith( matrix.phpcs_version, 'dev-' ) }}" == "true" ]; then
+          if [ "${{ startsWith( matrix.phpcs_version, 'dev-' ) || endsWith( matrix.phpcs_version, '-dev' ) }}" == "true" ]; then
             echo 'PHP_INI=error_reporting=E_ALL & ~E_DEPRECATED, display_errors=On' >> "$GITHUB_OUTPUT"
           else
             echo 'PHP_INI=error_reporting=-1, display_errors=On' >> "$GITHUB_OUTPUT"

.github/workflows/test.yml

@@ -113,7 +113,7 @@ jobs:
         #
         # Additionally, PHPCS 4.x has a minimum version requirement of PHP 7.2.
         php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
-        phpcs_version: ['dev-master', '4.0.0', 'dev-4.x']
+        phpcs_version: ['dev-master', '4.0.0', '4.x-dev']
 
         include:
           # Complete the matrix, while preventing issues with PHPCS versions incompatible with certain PHP versions.
@@ -172,7 +172,7 @@ jobs:
         run: |
           # On stable PHPCS versions, 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.
-          if [ "${{ startsWith( matrix.phpcs_version, 'dev-' ) }}" == "true" ]; then
+          if [ "${{ startsWith( matrix.phpcs_version, 'dev-' ) || endsWith( matrix.phpcs_version, '-dev' ) }}" == "true" ]; then
             echo 'PHP_INI=error_reporting=E_ALL & ~E_DEPRECATED, display_errors=On' >> "$GITHUB_OUTPUT"
           else
             echo 'PHP_INI=error_reporting=-1, display_errors=On' >> "$GITHUB_OUTPUT"