diff --git a/extensions/whatsapp/src/test-helpers.ts b/extensions/whatsapp/src/test-helpers.ts
index 3746319cf86..5587cf9c4f2 100644
--- a/extensions/whatsapp/src/test-helpers.ts
+++ b/extensions/whatsapp/src/test-helpers.ts
@@ -445,6 +445,7 @@ vi.mock("./auto-reply/monitor/inbound-dispatch.runtime.js", () => ({
   getAgentScopedMediaLocalRoots: () => [] as string[],
   jidToE164: normalizePhoneLikeToE164,
   logVerbose: (_msg: string) => undefined,
+  resolveChannelSourceReplyDeliveryMode: () => undefined,
   resolveChunkMode: () => undefined,
   resolveIdentityNamePrefix: resolveIdentityNamePrefixMock,
   resolveInboundLastRouteSessionKey: (params: { sessionKey: string }) => params.sessionKey,
@@ -479,6 +480,7 @@ vi.mock("./auto-reply/monitor/runtime-api.js", () => ({
   readStoreAllowFromForDmPolicy: async () => [] as string[],
   recordSessionMetaFromInbound: async () => undefined,
   resolveChannelContextVisibilityMode: resolveChannelContextVisibilityModeMock,
+  resolveChannelSourceReplyDeliveryMode: () => undefined,
   resolveChunkMode: () => undefined,
   resolveIdentityNamePrefix: resolveIdentityNamePrefixMock,
   resolveInboundLastRouteSessionKey: (params: { sessionKey: string }) => params.sessionKey,