diff --git a/spec/dummy/package.json b/spec/dummy/package.json
index a7c472e25..b92e721de 100644
--- a/spec/dummy/package.json
+++ b/spec/dummy/package.json
@@ -39,6 +39,5 @@
     "fork-ts-checker-webpack-plugin": "^6.5.2",
     "react-refresh": "^0.14.0",
     "webpack-dev-server": "^4.9.2"
-  },
-  "packageManager": "yarn@3.2.1"
+  }
 }