diff --git a/src/runtime/mocks/vue-devtools.ts b/src/runtime/mocks/vue-devtools.ts
index 8b9238068..a5396147a 100644
--- a/src/runtime/mocks/vue-devtools.ts
+++ b/src/runtime/mocks/vue-devtools.ts
@@ -4,3 +4,9 @@ export function createRpcServer() {}
 export const devtools = {
   init() {},
 }
+export function addCustomCommand() {}
+export function addCustomTab() {}
+export function onDevToolsClientConnected() {}
+export function onDevToolsConnected() {}
+export function removeCustomCommand() {}
+export function setupDevToolsPlugin() {}