diff --git a/src/Parser/ViolationParser.php b/src/Parser/ViolationParser.php
index cabab9c..e9d27f5 100644
--- a/src/Parser/ViolationParser.php
+++ b/src/Parser/ViolationParser.php
@@ -27,8 +27,8 @@ public function parse(string $xmlFilePath): Violation
 
     private function getErrorCode(string $xmlFilePath): string
     {
-        $part = '([^\/]*)';
-        preg_match("/$part\/Docs\/$part\/{$part}Standard\/$part\.xml/", $xmlFilePath, $matches);
+        $part = '([^/]*)';
+        preg_match("`$part/Docs/$part/{$part}Standard/$part\.xml$`", $xmlFilePath, $matches);
         if ($matches === []) {
             throw NotAViolationPath::fromPath($xmlFilePath);
         }
diff --git a/src/SniffFinder/FilesystemSniffFinder.php b/src/SniffFinder/FilesystemSniffFinder.php
index 58f744f..d310f5f 100644
--- a/src/SniffFinder/FilesystemSniffFinder.php
+++ b/src/SniffFinder/FilesystemSniffFinder.php
@@ -43,7 +43,7 @@ private function recursiveSearch(Folder $folder): Iterator
         $dirs = new RecursiveDirectoryIterator($folder->getPath());
         $files = new RecursiveIteratorIterator($dirs);
         return new CallbackFilterIterator($files, function (SplFileInfo $fileInfo) {
-            return preg_match('/\.php$/', $fileInfo->getPathname()) && !preg_match('/\/Tests\//', $fileInfo->getPathname());
+            return preg_match('/\.php$/', $fileInfo->getPathname()) && !preg_match('`/Tests/`', $fileInfo->getPathname());
         });
     }