diff --git a/internal/file/testdata/workspace/package.json b/internal/file/testdata/workspace/package.json
index c6e1b323..b9e6664a 100644
--- a/internal/file/testdata/workspace/package.json
+++ b/internal/file/testdata/workspace/package.json
@@ -7,6 +7,6 @@
     "typescript": "5.5.4"
   },
   "workspaces": [
-    "testdata/workspace/packages/*"
+    "testdata/workspace/packages/*", "testdata\\workspace\\packages\\*"
   ]
 }