diff --git a/calendar.test.js b/calendar.test.js
index f4db42c..1b26906 100644
--- a/calendar.test.js
+++ b/calendar.test.js
@@ -6,6 +6,7 @@ import path from 'path';
 import app from './server';
 
 const MERGED_CALENDARS_DIR = 'calendar';
+let server;
 
 describe('Calendar Merging API', () => {
     beforeAll(() => {