diff --git a/dev/tests/static/testsuite/Magento/Test/Legacy/UnsecureFunctionsUsageTest.php b/dev/tests/static/testsuite/Magento/Test/Legacy/UnsecureFunctionsUsageTest.php
index 52972683319e82bf14057876b29c6f30bb7d7b57..5220eb43644fdb8b852bc7341c1c21650f55eb4f 100644
--- a/dev/tests/static/testsuite/Magento/Test/Legacy/UnsecureFunctionsUsageTest.php
+++ b/dev/tests/static/testsuite/Magento/Test/Legacy/UnsecureFunctionsUsageTest.php
@@ -64,7 +64,7 @@ class UnsecureFunctionsUsageTest extends \PHPUnit_Framework_TestCase
                 if ($regexp) {
                     $matches = preg_grep(
                         $regexp,
-                        file($fileName, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES)
+                        file($fileName)
                     );
                     if (!empty($matches)) {
                         foreach (array_keys($matches) as $line) {
@@ -161,7 +161,7 @@ class UnsecureFunctionsUsageTest extends \PHPUnit_Framework_TestCase
         }
         $regexArray = [];
         foreach ($functions as $function) {
-            $regexArray[] = '\b' . $function . '\b\(';
+            $regexArray[] = '(?<!function |[^\s])\b' . $function . '\b\(';
         }
         return '/' . implode('|', $regexArray) . '/i';
     }
diff --git a/dev/tests/static/testsuite/Magento/Test/Legacy/_files/security/blacklist.php b/dev/tests/static/testsuite/Magento/Test/Legacy/_files/security/blacklist.php
index edcb6ab4d7fb9454cb1c5d6fe37d87b3daa9a230..3c93d37deba52f6c54bf7574a1c0f46212a785dc 100644
--- a/dev/tests/static/testsuite/Magento/Test/Legacy/_files/security/blacklist.php
+++ b/dev/tests/static/testsuite/Magento/Test/Legacy/_files/security/blacklist.php
@@ -6,5 +6,4 @@
 return [
     'Test/Unit',
     'lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php',
-    'lib/internal/Magento/Framework/Serialize/SerializerInterface.php',
 ];