diff --git a/src/infra/outbound/deliver.test.ts b/src/infra/outbound/deliver.test.ts
index 6db32f66795..08b2edee838 100644
--- a/src/infra/outbound/deliver.test.ts
+++ b/src/infra/outbound/deliver.test.ts
@@ -98,7 +98,7 @@ const whatsappChunkConfig: OpenClawConfig = {
   channels: { whatsapp: { textChunkLimit: 4000 } },
 };
 
-const expectedResolvedTmpRoot = path.resolve(resolvePreferredOpenClawTmpDir());
+const expectedPreferredTmpRoot = resolvePreferredOpenClawTmpDir();
 
 type DeliverOutboundArgs = Parameters<DeliverModule["deliverOutboundPayloads"]>[0];
 type DeliverOutboundPayload = DeliverOutboundArgs["payloads"][number];
@@ -491,7 +491,7 @@ describe("deliverOutboundPayloads", () => {
       "123",
       "hi",
       expect.objectContaining({
-        mediaLocalRoots: expect.arrayContaining([expectedResolvedTmpRoot]),
+        mediaLocalRoots: expect.arrayContaining([expectedPreferredTmpRoot]),
       }),
     );
   });
@@ -511,7 +511,7 @@ describe("deliverOutboundPayloads", () => {
       "+1555",
       "hi",
       expect.objectContaining({
-        mediaLocalRoots: expect.arrayContaining([expectedResolvedTmpRoot]),
+        mediaLocalRoots: expect.arrayContaining([expectedPreferredTmpRoot]),
       }),
     );
   });
@@ -574,7 +574,7 @@ describe("deliverOutboundPayloads", () => {
       "+1555",
       "hi",
       expect.objectContaining({
-        mediaLocalRoots: expect.arrayContaining([expectedResolvedTmpRoot]),
+        mediaLocalRoots: expect.arrayContaining([expectedPreferredTmpRoot]),
       }),
     );
   });
@@ -594,7 +594,7 @@ describe("deliverOutboundPayloads", () => {
       "imessage:+15551234567",
       "hi",
       expect.objectContaining({
-        mediaLocalRoots: expect.arrayContaining([expectedResolvedTmpRoot]),
+        mediaLocalRoots: expect.arrayContaining([expectedPreferredTmpRoot]),
       }),
     );
   });