diff --git a/test/api/unit/libs/content.test.js b/test/api/unit/libs/content.test.js
index 36a626151f..3dac94d4af 100644
--- a/test/api/unit/libs/content.test.js
+++ b/test/api/unit/libs/content.test.js
@@ -34,7 +34,7 @@ describe('contentLib', () => {
   });
 
   it('generates a hash for a filter', () => {
-    const hash = contentLib.hashForFilter('backgroundsFlat,gear.flat');
+    const hash = contentLib.hashForFilter(['backgroundsFlat', 'gear.flat']);
     expect(hash).to.equal('-1791877526');
   });
 
@@ -46,7 +46,7 @@ describe('contentLib', () => {
 
   it('serves filtered content', () => {
     const resSpy = generateRes();
-    contentLib.serveContent(resSpy, 'en', 'backgroundsFlat,gear.flat', false);
+    contentLib.serveContent(resSpy, 'en', ['backgroundsFlat', 'gear.flat'], false);
     expect(resSpy.send).to.have.been.calledOnce;
   });
 
@@ -81,7 +81,7 @@ describe('contentLib', () => {
     });
 
     it('caches filtered requests', async () => {
-      const filter = 'backgroundsFlat,gear.flat';
+      const filter = ['backgroundsFlat', 'gear.flat'];
       const hash = contentLib.hashForFilter(filter);
       expect(fs.existsSync(`${contentLib.CONTENT_CACHE_PATH}en${hash}.json`)).to.be.false;
       contentLib.serveContent(resSpy, 'en', filter, true);
@@ -89,7 +89,7 @@ describe('contentLib', () => {
     });
 
     it('serves filtered cached requests', async () => {
-      const filter = 'backgroundsFlat,gear.flat';
+      const filter = ['backgroundsFlat', 'gear.flat'];
       const hash = contentLib.hashForFilter(filter);
       fs.writeFileSync(
         `${contentLib.CONTENT_CACHE_PATH}en${hash}.json`,
diff --git a/website/server/controllers/api-v3/content.js b/website/server/controllers/api-v3/content.js
index b547459d2f..c742bed3ff 100644
--- a/website/server/controllers/api-v3/content.js
+++ b/website/server/controllers/api-v3/content.js
@@ -7,10 +7,10 @@ const IS_PROD = nconf.get('IS_PROD');
 const api = {};
 
 const MOBILE_FILTER = ['achievements', 'questSeriesAchievements', 'animalColorAchievements', 'animalSetAchievements',
-'stableAchievements', 'mystery', 'bundles', 'loginIncentives', 'pets', 'premiumPets', 'specialPets', 'questPets',
-'wackyPets', 'mounts', 'premiumMounts,specialMounts,questMounts', 'events', 'dropEggs', 'questEggs', 'dropHatchingPotions',
-'premiumHatchingPotions', 'wackyHatchingPotions', 'backgroundsFlat', 'questsByLevel', 'gear.tree', 'tasksByCategory',
-'userDefaults', 'timeTravelStable', 'gearTypes', 'cardTypes'];
+  'stableAchievements', 'mystery', 'bundles', 'loginIncentives', 'pets', 'premiumPets', 'specialPets', 'questPets',
+  'wackyPets', 'mounts', 'premiumMounts,specialMounts,questMounts', 'events', 'dropEggs', 'questEggs', 'dropHatchingPotions',
+  'premiumHatchingPotions', 'wackyHatchingPotions', 'backgroundsFlat', 'questsByLevel', 'gear.tree', 'tasksByCategory',
+  'userDefaults', 'timeTravelStable', 'gearTypes', 'cardTypes'];
 
 const ANDROID_FILTER = [...MOBILE_FILTER, 'appearances.background'];
 const IOS_FILTER = [...MOBILE_FILTER, 'backgrounds'];
@@ -74,20 +74,20 @@ api.getContent = {
       language = proposedLang;
     }
 
-    let filter_list = [];
-    let filter = req.query.filter || '';
+    let filterList = [];
+    const filter = req.query.filter || '';
     // apply defaults for mobile clients
     if (filter === '') {
       if (req.headers['x-client'] === 'habitica-android') {
-        filter_list = ANDROID_FILTER;
+        filterList = ANDROID_FILTER;
       } else if (req.headers['x-client'] === 'habitica-ios') {
-        filter_list = IOS_FILTER;
+        filterList = IOS_FILTER;
       }
     } else {
-      filter_list = filter.split(',');
+      filterList = filter.split(',');
     }
 
-    serveContent(res, language, filter_list, IS_PROD);
+    serveContent(res, language, filterList, IS_PROD);
   },
 };