diff --git a/src/test/fixtures/fake-client-metrics-store-v2.ts b/src/test/fixtures/fake-client-metrics-store-v2.ts
index 94e17375ef..d70ee53077 100644
--- a/src/test/fixtures/fake-client-metrics-store-v2.ts
+++ b/src/test/fixtures/fake-client-metrics-store-v2.ts
@@ -18,6 +18,12 @@ export default class FakeClientMetricsStoreV2
         super();
         this.setMaxListeners(0);
     }
+    getSeenAppsForFeatureToggle(
+        featureName: string,
+        hoursBack?: number,
+    ): Promise<string[]> {
+        throw new Error('Method not implemented.');
+    }
     getMetricsForFeatureToggle(
         featureName: string,
         hoursBack?: number,