diff --git a/src/api/helpers.js b/src/api/helpers.js
index ce41eca77..4bf16e0cc 100644
--- a/src/api/helpers.js
+++ b/src/api/helpers.js
@@ -17,7 +17,6 @@ export const paramsString = (params = {}) => {
     }
   })()
 
-
   const arrays = []
   const nonArrays = []
 
diff --git a/src/components/chat_message/chat_message.js b/src/components/chat_message/chat_message.js
index b3436191b..8444899e2 100644
--- a/src/components/chat_message/chat_message.js
+++ b/src/components/chat_message/chat_message.js
@@ -7,9 +7,9 @@ import ChatMessageDate from 'src/components/chat_message_date/chat_message_date.
 import Gallery from 'src/components/gallery/gallery.vue'
 import LinkPreview from 'src/components/link-preview/link-preview.vue'
 import Popover from 'src/components/popover/popover.vue'
-import StatusContent from 'src/components/status_content/status_content.vue'
-import StatusBody from 'src/components/status_body/status_body.vue'
 import StatusActionButtons from 'src/components/status_action_buttons/status_action_buttons.vue'
+import StatusBody from 'src/components/status_body/status_body.vue'
+import StatusContent from 'src/components/status_content/status_content.vue'
 import UserAvatar from 'src/components/user_avatar/user_avatar.vue'
 import UserPopover from 'src/components/user_popover/user_popover.vue'
 
@@ -28,7 +28,14 @@ library.add(faTimes, faEllipsisH, faCircleNotch)
 
 const ChatMessage = {
   name: 'ChatMessage',
-  props: ['edited', 'noHeading', 'previousItem', 'chatItem', 'previousItem', 'hoveredMessageChain'],
+  props: [
+    'edited',
+    'noHeading',
+    'previousItem',
+    'chatItem',
+    'previousItem',
+    'hoveredMessageChain',
+  ],
   emits: ['hover', 'replyRequested'],
   components: {
     Popover,
@@ -40,7 +47,8 @@ const ChatMessage = {
     Gallery,
     LinkPreview,
     ChatMessageDate,
-    UserPopover,},
+    UserPopover,
+  },
   computed: {
     // Returns HH:MM (hours and minutes) in local time.
     createdAt() {
@@ -74,10 +82,14 @@ const ChatMessage = {
       console.log('==')
       console.log('PREV', toValue(this.previousItem.data.raw_html))
       console.log('CURR', toValue(this.chatItem.data.raw_html))
-      return this.previousItem.data.id !== this.chatItem.data.in_reply_to_status_id
+      return (
+        this.previousItem.data.id !== this.chatItem.data.in_reply_to_status_id
+      )
     },
     customReplyTo() {
-      return find(this.$store.state.statuses.allStatuses, { id: this.chatItem.data.in_reply_to_status_id })
+      return find(this.$store.state.statuses.allStatuses, {
+        id: this.chatItem.data.in_reply_to_status_id,
+      })
     },
     messageForStatusContent() {
       return {
diff --git a/src/components/chat_view/chat_view.js b/src/components/chat_view/chat_view.js
index 8cdb3535f..ee72d592f 100644
--- a/src/components/chat_view/chat_view.js
+++ b/src/components/chat_view/chat_view.js
@@ -51,6 +51,9 @@ const Chat = {
     ChatTitle,
     PostStatusForm,
   },
+  props: {
+    testMode: Boolean,
+  },
   data() {
     return {
       // Main info
@@ -76,6 +79,7 @@ const Chat = {
     }
   },
   created() {
+    if (this.testMode) return
     this.startFetching()
     window.addEventListener('resize', this.handleResize)
   },
@@ -210,13 +214,16 @@ const Chat = {
 
       if (!isNewMessage) return
 
-      await readChat({
-        id: this.chat.id,
-        lastReadId,
-        credentials: useOAuthStore().token,
-      })
+      if (!this.testMode)
+        await readChat({
+          id: this.chat.id,
+          lastReadId,
+          credentials: useOAuthStore().token,
+        })
 
       useChatsStore().readChat(this.chat.id)
+      this.lastReadMessageId = this.maxId
+      this.newMessageCount = 0
     },
     bottomedOut(offset) {
       return isBottomedOut(offset)
@@ -224,24 +231,27 @@ const Chat = {
     reachedTop() {
       return window.scrollY <= 0
     },
+    cullOlder() {
+      const maxIndex = this.messages.length
+      const minIndex = maxIndex - 50
+      if (maxIndex <= 50) return
+
+      this.messages = sortBy(this.messages, ['id'])
+      this.minId = this.messages[minIndex].id
+
+      for (const message of this.messages) {
+        if (message.id < this.minId) {
+          delete this.messagesIndex[message.id]
+          delete this.idempotencyKeyIndex[message.idempotency_key]
+        }
+      }
+
+      this.messages = this.messages.slice(minIndex, maxIndex)
+    },
     cullOlderCheck() {
       window.setTimeout(() => {
         if (this.bottomedOut(JUMP_TO_BOTTOM_BUTTON_VISIBILITY_OFFSET)) {
-          const maxIndex = this.messages.length
-          const minIndex = maxIndex - 50
-          if (maxIndex <= 50) return
-
-          this.messages = sortBy(this.messages, ['id'])
-          this.minId = this.messages[minIndex].id
-
-          for (const message of this.messages) {
-            if (message.id < this.minId) {
-              delete this.messagesIndex[message.id]
-              delete this.idempotencyKeyIndex[message.idempotency_key]
-            }
-          }
-
-          this.messages = this.messages.slice(minIndex, maxIndex)
+          this.cullOlder()
         }
       }, 5000)
     },
@@ -354,11 +364,12 @@ const Chat = {
       this.fetchChat({ isFirstFetch: true })
     },
     async deleteChatMessage({ chatId, messageId }) {
-      await deleteChatMessage({
-        chatId,
-        messageId,
-        credentials: useOAuthStore().token,
-      })
+      if (!this.testMode)
+        await deleteChatMessage({
+          chatId,
+          messageId,
+          credentials: useOAuthStore().token,
+        })
 
       this.messages = this.messages.filter((m) => m.id !== messageId)
       delete this.messagesIndex[messageId]
@@ -406,7 +417,7 @@ const Chat = {
         }
 
         if (!this.messagesIndex[message.id] && !isConfirmation(this, message)) {
-          if (this.lastSeenMessageId < message.id) {
+          if (this.lastReadMessageId < message.id) {
             this.newMessageCount++
           }
           this.messagesIndex[message.id] = message
diff --git a/src/components/conversation/conversation.js b/src/components/conversation/conversation.js
index 67ed1c307..91ffc09a3 100644
--- a/src/components/conversation/conversation.js
+++ b/src/components/conversation/conversation.js
@@ -2,11 +2,11 @@ import { clone, filter, findIndex, get, reduce } from 'lodash'
 import { mapState as mapPiniaState } from 'pinia'
 import { mapState } from 'vuex'
 
-import StatusContent from 'src/components/status_content/status_content.vue'
-import PostStatusForm from 'src/components/post_status_form/post_status_form.vue'
 import ChatMessageList from 'src/components/chat_message_list/chat_message_list.vue'
+import PostStatusForm from 'src/components/post_status_form/post_status_form.vue'
 import QuickFilterSettings from 'src/components/quick_filter_settings/quick_filter_settings.vue'
 import QuickViewSettings from 'src/components/quick_view_settings/quick_view_settings.vue'
+import StatusContent from 'src/components/status_content/status_content.vue'
 import ThreadTree from 'src/components/thread_tree/thread_tree.vue'
 
 import { useInterfaceStore } from 'src/stores/interface'
@@ -25,7 +25,13 @@ import {
   faTimes,
 } from '@fortawesome/free-solid-svg-icons'
 
-library.add(faAngleDoubleDown, faAngleDoubleLeft, faChevronLeft, faReply, faTimes)
+library.add(
+  faAngleDoubleDown,
+  faAngleDoubleLeft,
+  faChevronLeft,
+  faReply,
+  faTimes,
+)
 
 const sortById = (a, b) => {
   const idA = a.type === 'retweet' ? a.retweeted_status.id : a.id
diff --git a/src/components/side_drawer/side_drawer.js b/src/components/side_drawer/side_drawer.js
index 2098b3dff..369177c7a 100644
--- a/src/components/side_drawer/side_drawer.js
+++ b/src/components/side_drawer/side_drawer.js
@@ -7,12 +7,12 @@ import GestureService from '../../services/gesture_service/gesture_service'
 import { unseenNotificationsFromStore } from '../../services/notification_utils/notification_utils'
 
 import { useAnnouncementsStore } from 'src/stores/announcements'
+import { useChatsStore } from 'src/stores/chats.js'
 import { useInstanceStore } from 'src/stores/instance.js'
 import { useInstanceCapabilitiesStore } from 'src/stores/instance_capabilities.js'
 import { useInterfaceStore } from 'src/stores/interface'
 import { useMergedConfigStore } from 'src/stores/merged_config.js'
 import { useShoutStore } from 'src/stores/shout'
-import { useChatsStore } from 'src/stores/chats.js'
 
 import { library } from '@fortawesome/fontawesome-svg-core'
 import {
diff --git a/src/components/status_action_buttons/action_button.js b/src/components/status_action_buttons/action_button.js
index 17a67afc7..eed8cad9a 100644
--- a/src/components/status_action_buttons/action_button.js
+++ b/src/components/status_action_buttons/action_button.js
@@ -105,7 +105,9 @@ export default {
       return useMergedConfigStore().mergedConfig.hidePostStats
     },
     buttonInnerClass() {
-      const buttonStyleClass = this.defaultButtonStyle ? 'button-default' : 'button-unstyled'
+      const buttonStyleClass = this.defaultButtonStyle
+        ? 'button-default'
+        : 'button-unstyled'
       return [
         this.button.name + '-button',
         {
diff --git a/src/components/status_action_buttons/action_button_container.js b/src/components/status_action_buttons/action_button_container.js
index 4d316741d..fa4a529c6 100644
--- a/src/components/status_action_buttons/action_button_container.js
+++ b/src/components/status_action_buttons/action_button_container.js
@@ -42,7 +42,7 @@ export default {
         ),
     ),
   },
-  props: ['button', 'status', 'defaultButton','hideLabel'],
+  props: ['button', 'status', 'defaultButton', 'hideLabel'],
   emits: ['emojiPickerShown'],
   mounted() {
     if (this.button.name === 'mute') {
diff --git a/src/components/status_action_buttons/status_action_buttons.js b/src/components/status_action_buttons/status_action_buttons.js
index d952faa6a..5309f44a3 100644
--- a/src/components/status_action_buttons/status_action_buttons.js
+++ b/src/components/status_action_buttons/status_action_buttons.js
@@ -38,7 +38,7 @@ const StatusActionButtons = {
     hideLabels: {
       type: Boolean,
       default: false,
-    }
+    },
   },
   emits: ['toggleReplying', 'onSuccess', 'onError'],
   data() {
@@ -64,7 +64,8 @@ const StatusActionButtons = {
   },
   computed: {
     ...mapState(useSyncConfigStore, {
-      userPinnedItems: (store) => new Set(store.prefsStorage.collections.pinnedStatusActions),
+      userPinnedItems: (store) =>
+        new Set(store.prefsStorage.collections.pinnedStatusActions),
     }),
     pinnedItems() {
       if (this.fixedPinned) {
diff --git a/test/unit/specs/components/chat_view.spec.js b/test/unit/specs/components/chat_view.spec.js
index 5f9c1fca2..90adffa86 100644
--- a/test/unit/specs/components/chat_view.spec.js
+++ b/test/unit/specs/components/chat_view.spec.js
@@ -1,7 +1,7 @@
+import { createTestingPinia } from '@pinia/testing'
 import { shallowMount } from '@vue/test-utils'
 import { setActivePinia } from 'pinia'
-import { createTestingPinia } from '@pinia/testing'
-import { HttpResponse, http } from 'msw'
+
 import ChatView from './chat_view.vue'
 
 const message1 = {
@@ -32,7 +32,7 @@ const global = {
     $store: {
       state: {
         api: {},
-        users: {}
+        users: {},
       },
     },
     $route: {
@@ -41,8 +41,10 @@ const global = {
       },
     },
     $router: {
-      push: () => {}
-    }
+      push: () => {
+        /* noop */
+      },
+    },
   },
   stubs: {
     FAIcon: true,