diff --git a/src/cron/isolated-agent/delivery-target.test.ts b/src/cron/isolated-agent/delivery-target.test.ts
index cfc492abe3b..df7d29d419f 100644
--- a/src/cron/isolated-agent/delivery-target.test.ts
+++ b/src/cron/isolated-agent/delivery-target.test.ts
@@ -64,6 +64,23 @@ function setMainSessionEntry(entry?: SessionStore[string]) {
   vi.mocked(loadSessionStore).mockReturnValue(store);
 }
 
+function setLastSessionEntry(params: {
+  sessionId: string;
+  lastChannel: string;
+  lastTo: string;
+  lastThreadId?: string;
+  lastAccountId?: string;
+}) {
+  setMainSessionEntry({
+    sessionId: params.sessionId,
+    updatedAt: 1000,
+    lastChannel: params.lastChannel,
+    lastTo: params.lastTo,
+    ...(params.lastThreadId ? { lastThreadId: params.lastThreadId } : {}),
+    ...(params.lastAccountId ? { lastAccountId: params.lastAccountId } : {}),
+  });
+}
+
 function setWhatsAppAllowFrom(allowFrom: string[]) {
   vi.mocked(resolveWhatsAppAccount).mockReturnValue({
     allowFrom,
@@ -86,11 +103,17 @@ async function resolveForAgent(params: {
   });
 }
 
+async function resolveLastTarget(cfg: OpenClawConfig) {
+  return resolveForAgent({
+    cfg,
+    target: { channel: "last", to: undefined },
+  });
+}
+
 describe("resolveDeliveryTarget", () => {
   it("reroutes implicit whatsapp delivery to authorized allowFrom recipient", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-w1",
-      updatedAt: 1000,
       lastChannel: "whatsapp",
       lastTo: "+15550000099",
     });
@@ -98,16 +121,15 @@ describe("resolveDeliveryTarget", () => {
     setStoredWhatsAppAllowFrom(["+15550000001"]);
 
     const cfg = makeCfg({ bindings: [] });
-    const result = await resolveDeliveryTarget(cfg, AGENT_ID, { channel: "last", to: undefined });
+    const result = await resolveLastTarget(cfg);
 
     expect(result.channel).toBe("whatsapp");
     expect(result.to).toBe("+15550000001");
   });
 
   it("keeps explicit whatsapp target unchanged", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-w2",
-      updatedAt: 1000,
       lastChannel: "whatsapp",
       lastTo: "+15550000099",
     });
@@ -220,9 +242,8 @@ describe("resolveDeliveryTarget", () => {
   });
 
   it("drops session threadId when destination does not match the previous recipient", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-2",
-      updatedAt: 1000,
       lastChannel: "telegram",
       lastTo: "999999",
       lastThreadId: "thread-1",
@@ -233,9 +254,8 @@ describe("resolveDeliveryTarget", () => {
   });
 
   it("keeps session threadId when destination matches the previous recipient", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-3",
-      updatedAt: 1000,
       lastChannel: "telegram",
       lastTo: "123456",
       lastThreadId: "thread-2",
@@ -248,10 +268,7 @@ describe("resolveDeliveryTarget", () => {
   it("uses single configured channel when neither explicit nor session channel exists", async () => {
     setMainSessionEntry(undefined);
 
-    const result = await resolveForAgent({
-      cfg: makeCfg({ bindings: [] }),
-      target: { channel: "last", to: undefined },
-    });
+    const result = await resolveLastTarget(makeCfg({ bindings: [] }));
     expect(result.channel).toBe("telegram");
     expect(result.ok).toBe(false);
     if (result.ok) {
@@ -268,10 +285,7 @@ describe("resolveDeliveryTarget", () => {
       new Error("Channel is required when multiple channels are configured: telegram, slack"),
     );
 
-    const result = await resolveForAgent({
-      cfg: makeCfg({ bindings: [] }),
-      target: { channel: "last", to: undefined },
-    });
+    const result = await resolveLastTarget(makeCfg({ bindings: [] }));
     expect(result.channel).toBeUndefined();
     expect(result.to).toBeUndefined();
     expect(result.ok).toBe(false);
@@ -308,17 +322,13 @@ describe("resolveDeliveryTarget", () => {
   });
 
   it("uses main session channel when channel=last and session route exists", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-4",
-      updatedAt: 1000,
       lastChannel: "telegram",
       lastTo: "987654",
     });
 
-    const result = await resolveForAgent({
-      cfg: makeCfg({ bindings: [] }),
-      target: { channel: "last", to: undefined },
-    });
+    const result = await resolveLastTarget(makeCfg({ bindings: [] }));
 
     expect(result.channel).toBe("telegram");
     expect(result.to).toBe("987654");
@@ -326,9 +336,8 @@ describe("resolveDeliveryTarget", () => {
   });
 
   it("explicit delivery.accountId overrides session-derived accountId", async () => {
-    setMainSessionEntry({
+    setLastSessionEntry({
       sessionId: "sess-5",
-      updatedAt: 1000,
       lastChannel: "telegram",
       lastTo: "chat-999",
       lastAccountId: "default",