chore: minor test changes

Author: DmitryAnansky

packages/cli/src/__tests__/commands/push.test.ts

@@ -52,9 +52,12 @@ const originalFetch = global.fetch;
 describe('push', () => {
   const redoclyClient = require('@redocly/openapi-core').__redoclyClient;
 
+  beforeAll(() => {
+    global.fetch = mockFetch;
+  });
+
   beforeEach(() => {
     jest.spyOn(process.stdout, 'write').mockImplementation(() => true);
-    global.fetch = mockFetch;
   });
 
   afterAll(() => {