diff --git a/packages/cli/src/config/extension.test.ts b/packages/cli/src/config/extension.test.ts
index 6f50c301d..2bae9c1ec 100644
--- a/packages/cli/src/config/extension.test.ts
+++ b/packages/cli/src/config/extension.test.ts
@@ -56,6 +56,17 @@ vi.mock('simple-git', () => ({
   }),
 }));
 
+vi.mock('./extensions/github.js', async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import('./extensions/github.js')>();
+  return {
+    ...actual,
+    downloadFromGitHubRelease: vi
+      .fn()
+      .mockRejectedValue(new Error('Mocked GitHub release download failure')),
+  };
+});
+
 vi.mock('os', async (importOriginal) => {
   const mockedOs = await importOriginal<typeof os>();
   return {
diff --git a/packages/cli/src/config/extensions/update.test.ts b/packages/cli/src/config/extensions/update.test.ts
index 3e916ec91..849857e4d 100644
--- a/packages/cli/src/config/extensions/update.test.ts
+++ b/packages/cli/src/config/extensions/update.test.ts
@@ -41,6 +41,17 @@ vi.mock('simple-git', () => ({
   }),
 }));
 
+vi.mock('../extensions/github.js', async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import('../extensions/github.js')>();
+  return {
+    ...actual,
+    downloadFromGitHubRelease: vi
+      .fn()
+      .mockRejectedValue(new Error('Mocked GitHub release download failure')),
+  };
+});
+
 vi.mock('os', async (importOriginal) => {
   const mockedOs = await importOriginal<typeof os>();
   return {