diff --git a/.github/workflows/tests-levels-matrix.php b/.github/workflows/tests-levels-matrix.php
index ecdb0cb964..fae513cf8c 100644
--- a/.github/workflows/tests-levels-matrix.php
+++ b/.github/workflows/tests-levels-matrix.php
@@ -19,7 +19,7 @@
 		[$className, $testName] = explode('::', $testCaseName, 2);
 		$fileName = 'tests/'. str_replace('\\', DIRECTORY_SEPARATOR, $className) . '.php';
 
-		$filter = str_replace('\\', '\\\\', $testCaseName);
+		$filter = preg_quote($testCaseName);
 
 		$testFilters[] = sprintf("%s --filter %s", escapeshellarg($fileName), escapeshellarg($filter));
 	}