diff --git a/extensions/memory-core/src/memory/manager.watcher-config.test.ts b/extensions/memory-core/src/memory/manager.watcher-config.test.ts
index 409a833c1fb..721cc0bd012 100644
--- a/extensions/memory-core/src/memory/manager.watcher-config.test.ts
+++ b/extensions/memory-core/src/memory/manager.watcher-config.test.ts
@@ -151,8 +151,11 @@ describe("memory watcher config", () => {
   let manager: MemoryIndexManager | null = null;
   let workspaceDir = "";
   let extraDir = "";
+  let originalPlatform: NodeJS.Platform;
 
   beforeEach(async () => {
+    originalPlatform = process.platform;
+    Object.defineProperty(process, "platform", { value: "darwin", configurable: true });
     vi.clearAllMocks();
     clearRegistry();
     registerBuiltInMemoryEmbeddingProviders({ registerMemoryEmbeddingProvider: registerAdapter });
@@ -166,6 +169,7 @@ describe("memory watcher config", () => {
 
   afterEach(async () => {
     vi.useRealTimers();
+    Object.defineProperty(process, "platform", { value: originalPlatform, configurable: true });
     watchMock.mockClear();
     nativeWatchMock.mockClear();
     createdChokidarWatchers.length = 0;
diff --git a/extensions/whatsapp/src/accounts.ts b/extensions/whatsapp/src/accounts.ts
index aa8302d38c8..17f2b94aaf7 100644
--- a/extensions/whatsapp/src/accounts.ts
+++ b/extensions/whatsapp/src/accounts.ts
@@ -162,7 +162,7 @@ export function resolveWhatsAppMediaMaxBytes(
     typeof account.mediaMaxMb === "number" && account.mediaMaxMb > 0
       ? account.mediaMaxMb
       : DEFAULT_WHATSAPP_MEDIA_MAX_MB;
-  return mediaMaxMb * 1024 * 1024;
+  return Math.floor(mediaMaxMb * 1024 * 1024);
 }
 
 export function listEnabledWhatsAppAccounts(cfg: OpenClawConfig): ResolvedWhatsAppAccount[] {