diff --git a/workspaces/arborist/test/fixtures/tap-react15-collision/package.json b/workspaces/arborist/test/fixtures/tap-react15-collision/package.json
index 413e45a584917..28381d1e7b16e 100644
--- a/workspaces/arborist/test/fixtures/tap-react15-collision/package.json
+++ b/workspaces/arborist/test/fixtures/tap-react15-collision/package.json
@@ -5,6 +5,6 @@
     "react": "15"
   },
   "devDependencies": {
-    "tap": "unbundled"
+    "tap": "18.0.0"
   }
 }