diff --git a/src/cli/install.test.ts b/src/cli/install.test.ts
index a83f48c79..e967ed6b4 100644
--- a/src/cli/install.test.ts
+++ b/src/cli/install.test.ts
@@ -53,6 +53,14 @@ describe("install CLI - binary check behavior", () => {
     isOpenCodeInstalledSpy = spyOn(configManager, "isOpenCodeInstalled").mockResolvedValue(false)
     getOpenCodeVersionSpy = spyOn(configManager, "getOpenCodeVersion").mockResolvedValue(null)
 
+    // given mock npm fetch
+    globalThis.fetch = mock(() =>
+      Promise.resolve({
+        ok: true,
+        json: () => Promise.resolve({ latest: "3.0.0" }),
+      } as Response)
+    ) as unknown as typeof fetch
+
     const args: InstallArgs = {
       tui: false,
       claude: "yes",