diff --git a/src/Parser/SniffParser.php b/src/Parser/SniffParser.php
index d8e4565..c298389 100644
--- a/src/Parser/SniffParser.php
+++ b/src/Parser/SniffParser.php
@@ -77,8 +77,8 @@ private function getSniffClassName(string $phpFilePath): string
      */
     private function getSniffFileParts(string $filePath): array
     {
-        $part = '([^\/]*)';
-        preg_match("/$part\/Sniffs\/$part\/{$part}Sniff\.php/", $filePath, $matches);
+        $part = '([^/]*)';
+        preg_match("`$part/Sniffs/$part/{$part}Sniff\.php$`", $filePath, $matches);
         if ($matches === []) {
             throw NotASniffPath::fromPath($filePath);
         }