diff --git a/packages/inter-protocol/test/vaultFactory/driver.js b/packages/inter-protocol/test/vaultFactory/driver.js
index 9a6d3d398fc..f7206295f8c 100644
--- a/packages/inter-protocol/test/vaultFactory/driver.js
+++ b/packages/inter-protocol/test/vaultFactory/driver.js
@@ -333,6 +333,10 @@ export const makeManagerDriver = async (
     publicTopics.asset.subscriber,
   );
   let managerNotification = await E(managerNotifier).getUpdateSince();
+  const metricsNotifier = await makeNotifierFromSubscriber(
+    publicTopics.metrics.subscriber,
+  );
+  let metricsNotification = await E(metricsNotifier).getUpdateSince();
 
   /** @type {UserSeat} */
   let currentSeat;
@@ -556,6 +560,21 @@ export const makeManagerDriver = async (
       }
       return managerNotification;
     },
+    /**
+     * @param {object} [likeExpected]
+     * @param {AT_NEXT | number} [optSince] AT_NEXT is an alias for updateCount
+     *   of the last update, forcing to wait for another
+     */
+    metricsNotified: async (likeExpected, optSince) => {
+      metricsNotification = await E(metricsNotifier).getUpdateSince(
+        optSince === AT_NEXT ? metricsNotification.updateCount : optSince,
+      );
+      trace(t, 'metrics notifier', metricsNotification);
+      if (likeExpected) {
+        t.like(metricsNotification.value, likeExpected);
+      }
+      return managerNotification;
+    },
     checkReserveAllocation: async stableValue => {
       const { reserveCreatorFacet } = t.context;
       const reserveAllocations = await E(reserveCreatorFacet).getAllocations();