Update spec/index.spec.ts

Co-authored-by: Alberto Gonzalez <[email protected]>

spec/index.spec.ts

@@ -640,7 +640,7 @@ describe('axiosRetry(axios, { retries, retryDelay })', () => {
       }, done.fail);
     });
 
-    it('should more than 1200 milliseconds', (done) => {
+    it('should take more than 300 milliseconds with 50ms delay and 4 retries', (done) => {
       const client = axios.create();
       setupResponses(client, [
         () => nock('http://example.com').get('/test').replyWithError(NETWORK_ERROR),