diff --git a/src/components/user_profile/user_profile.js b/src/components/user_profile/user_profile.js
index 2d186bc5aa..a8dfce2f16 100644
--- a/src/components/user_profile/user_profile.js
+++ b/src/components/user_profile/user_profile.js
@@ -68,7 +68,7 @@ const UserProfile = {
     },
     userInStore () {
       const routeParams = this.$route.params
-      return this.$store.getters.findUser(routeParams.name || routeParams.iid)
+      return this.$store.getters.findUser(routeParams.name || routeParams.id)
     },
     user () {
       if (this.timeline.statuses[0]) {
@@ -135,13 +135,14 @@ const UserProfile = {
     }
   },
   watch: {
-    userId (newVal, oldVal) {
+    // userId can be undefined if we don't know it yet
+    userId (newVal) {
       if (newVal) {
         this.cleanUp()
         this.startUp()
       }
     },
-    userName (newVal, oldVal) {
+    userName () {
       if (this.$route.params.name) {
         this.fetchUserId()
         this.cleanUp()
diff --git a/src/modules/statuses.js b/src/modules/statuses.js
index 2b0215f0bf..ea1b2de0c2 100644
--- a/src/modules/statuses.js
+++ b/src/modules/statuses.js
@@ -73,7 +73,7 @@ const mergeOrAdd = (arr, obj, item) => {
   if (oldItem) {
     // We already have this, so only merge the new info.
     // We ignore null values to avoid overwriting existing properties with missing data
-    // we also skip 'used' because that is handled by users module
+    // we also skip 'user' because that is handled by users module
     merge(oldItem, omitBy(item, (v, k) => v === null || k === 'user'))
     // Reactivity fix.
     oldItem.attachments.splice(oldItem.attachments.length)
diff --git a/src/modules/users.js b/src/modules/users.js
index e4146c3105..5eabb1ec43 100644
--- a/src/modules/users.js
+++ b/src/modules/users.js
@@ -18,7 +18,7 @@ export const mergeOrAdd = (arr, obj, item) => {
     arr.push(item)
     obj[item.id] = item
     if (item.screen_name && !item.screen_name.includes('@')) {
-      obj[item.screen_name] = item
+      obj[item.screen_name.toLowerCase()] = item
     }
     return { item, new: true }
   }
@@ -132,7 +132,7 @@ export const mutations = {
 }
 
 export const getters = {
-  findUser: state => query => state.usersObject[query]
+  findUser: state => query => state.usersObject[typeof query === 'string' ? query.toLowerCase() : query]
 }
 
 export const defaultState = {
diff --git a/test/unit/specs/components/user_profile.spec.js b/test/unit/specs/components/user_profile.spec.js
index 23e5ce20b1..847481f33d 100644
--- a/test/unit/specs/components/user_profile.spec.js
+++ b/test/unit/specs/components/user_profile.spec.js
@@ -12,6 +12,11 @@ const mutations = {
   setError: () => {}
 }
 
+const actions = {
+  fetchUser: () => {},
+  fetchUserByScreenName: () => {}
+}
+
 const testGetters = {
   findUser: state => getters.findUser(state.users)
 }
@@ -30,6 +35,7 @@ const extUser = {
 
 const externalProfileStore = new Vuex.Store({
   mutations,
+  actions,
   getters: testGetters,
   state: {
     api: {
@@ -88,7 +94,7 @@ const externalProfileStore = new Vuex.Store({
       currentUser: {
         credentials: ''
       },
-      usersObject: [extUser],
+      usersObject: { 100: extUser },
       users: [extUser]
     }
   }
@@ -96,6 +102,7 @@ const externalProfileStore = new Vuex.Store({
 
 const localProfileStore = new Vuex.Store({
   mutations,
+  actions,
   getters: testGetters,
   state: {
     api: {
@@ -154,14 +161,13 @@ const localProfileStore = new Vuex.Store({
       currentUser: {
         credentials: ''
       },
-      usersObject: [localUser],
+      usersObject: { 100: localUser, 'testuser': localUser },
       users: [localUser]
     }
   }
 })
 
-// It's a little bit more complicated now
-describe.skip('UserProfile', () => {
+describe('UserProfile', () => {
   it('renders external profile', () => {
     const wrapper = mount(UserProfile, {
       localVue,
diff --git a/test/unit/specs/modules/users.spec.js b/test/unit/specs/modules/users.spec.js
index a7f18dce3c..c8bc0ae7a5 100644
--- a/test/unit/specs/modules/users.spec.js
+++ b/test/unit/specs/modules/users.spec.js
@@ -40,7 +40,7 @@ describe('The users module', () => {
       const state = {
         usersObject: {
           1: user,
-          Guy: user
+          guy: user
         }
       }
       const name = 'Guy'
@@ -53,7 +53,7 @@ describe('The users module', () => {
       const state = {
         usersObject: {
           1: user,
-          Guy: user
+          guy: user
         }
       }
       const id = '1'