diff --git a/tests/SnifferFixTest.php b/tests/SnifferFixTest.php
index c3429cb..693ebca 100644
--- a/tests/SnifferFixTest.php
+++ b/tests/SnifferFixTest.php
@@ -23,7 +23,7 @@ public function testFix()
 
         // backup original content
         $orig = [];
-        $paths = self::getFilesList($sniffer);
+        $paths = SnifferFixTest::getFilesList($sniffer);
         /** @var string $path */
         foreach ($paths as $path => $v) {
             $orig[$path] = file_get_contents($path);
diff --git a/tests/SnifferTest.php b/tests/SnifferTest.php
index e5f9dfc..f79373c 100644
--- a/tests/SnifferTest.php
+++ b/tests/SnifferTest.php
@@ -27,7 +27,7 @@ public function testFindFencedCodeBlocks(
         }
 
         $sniffer = new Sniffer();
-        $files = self::getFilesList($sniffer);
+        $files = SnifferTest::getFilesList($sniffer);
 
         $findFencedCodeblocks = new ReflectionMethod($sniffer, 'findFencedCodeblocks');
         $findFencedCodeblocks->setAccessible(true);