diff --git a/.php_cs b/.php_cs
index bb24e85177..f944e9f615 100644
--- a/.php_cs
+++ b/.php_cs
@@ -1,16 +1,16 @@
 <?php
 
-$finder = PhpCsFixer\Finder::create()
-    ->notPath('appengine/wordpress/src/files/flexible/wp-config.php')
-    ->notPath('appengine/wordpress/src/files/standard/wp-config.php')
-    ->in(__DIR__);
+$finder = Symfony\CS\Finder\DefaultFinder::create()
+    ->in(__DIR__)
+;
 
-return PhpCsFixer\Config::create()
-    ->setRules(array(
-        '@PSR2' => true,
-        'concat_with_spaces' => true,
-        'no_unused_imports' => true,
-        'no_trailing_whitespace' => true,
-        'no_tab_indentation' => true,
-    ))
-    ->finder($finder);
+return Symfony\CS\Config\Config::create()
+    ->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
+    ->fixers([
+        'concat_with_spaces',
+        'unused_use',
+        'trailing_spaces',
+        'indentation'
+    ])
+    ->finder($finder)
+;
diff --git a/testing/run_test_suite.sh b/testing/run_test_suite.sh
index c4b0c04806..c1873a037e 100755
--- a/testing/run_test_suite.sh
+++ b/testing/run_test_suite.sh
@@ -17,7 +17,7 @@ set -ex
 
 # run php-cs-fixer
 if [ "${RUN_CS_FIXER}" = "true" ]; then
-    ${HOME}/php-cs-fixer fix --dry-run --diff --config=.php_cs
+    ${HOME}/php-cs-fixer fix --dry-run --diff
 fi
 
 # loop through all directories containing "phpunit.xml" and run them