diff --git a/src/test/testing/helpers-nodes.ts b/src/test/testing/helpers-nodes.ts
index 81a236530e2c..4332b1555771 100644
--- a/src/test/testing/helpers-nodes.ts
+++ b/src/test/testing/helpers-nodes.ts
@@ -59,7 +59,7 @@ export function createFileResults(
     if (!xmlName) {
         xmlName = filename
             .replace(/\.[^.]+$/, '')
-            .replace(RegExp(path.sep), '.')
+            .replace(/[\\\/]/, '.')
             .replace(/^[.\\\/]*/, '');
     }
     return {