diff --git a/src/cli/update-cli.test.ts b/src/cli/update-cli.test.ts
index 3845df01ec3..ae08bbbacd9 100644
--- a/src/cli/update-cli.test.ts
+++ b/src/cli/update-cli.test.ts
@@ -1132,7 +1132,7 @@ describe("update-cli", () => {
   it("uses ~/openclaw as the default dev checkout directory", async () => {
     const homedirSpy = vi.spyOn(os, "homedir").mockReturnValue("/tmp/oc-home");
     await withEnvAsync({ OPENCLAW_GIT_DIR: undefined }, async () => {
-      expect(resolveGitInstallDir()).toBe(path.join("/tmp/oc-home", "openclaw"));
+      expect(resolveGitInstallDir()).toBe(path.posix.join("/tmp/oc-home", "openclaw"));
     });
     homedirSpy.mockRestore();
   });