diff --git a/packages/api/core/test/slow/install_spec_slow.ts b/packages/api/core/test/slow/install_spec_slow.ts
index 67be997e85..469308169f 100644
--- a/packages/api/core/test/slow/install_spec_slow.ts
+++ b/packages/api/core/test/slow/install_spec_slow.ts
@@ -1,10 +1,11 @@
 import { expect } from 'chai';
-import fetchMock from 'fetch-mock';
 import proxyquire from 'proxyquire';
 import sinon, { SinonSpy } from 'sinon';
 
 import { InstallOptions, InstallAsset } from '../../src/api';
 
+const fetchMock = require('fetch-mock/es5/server');
+
 describe('install', () => {
   let install: (opts: InstallOptions) => Promise<void>;
   let nuggetSpy: SinonSpy;