diff --git a/src/api/public.js b/src/api/public.js
index 839196b9e..7e109e297 100644
--- a/src/api/public.js
+++ b/src/api/public.js
@@ -25,7 +25,8 @@ export const MASTODON_FOLLOWERS_URL = (
   `/api/v1/accounts/${id}/followers${paramsString({ minId, maxId, sinceId, limit, withRelationships })}`
 
 export const MASTODON_STATUS_URL = (id) => `/api/v1/statuses/${id}`
-const MASTODON_STATUS_CONTEXT_URL = (id) => `/api/v1/statuses/${id}/context`
+export const MASTODON_STATUS_CONTEXT_URL = (id) =>
+  `/api/v1/statuses/${id}/context`
 export const MASTODON_STATUS_SOURCE_URL = (id) =>
   `/api/v1/statuses/${id}/source`
 export const MASTODON_STATUS_HISTORY_URL = (id) =>
diff --git a/src/components/conversation/conversation.js b/src/components/conversation/conversation.js
index 9855c01cd..b0d116341 100644
--- a/src/components/conversation/conversation.js
+++ b/src/components/conversation/conversation.js
@@ -1,15 +1,14 @@
 import { storeToRefs } from 'pinia'
 import {
   computed,
+  nextTick,
   onUnmounted,
   provide,
   ref,
   toRefs,
   useTemplateRef,
   watch,
-  nextTick,
 } from 'vue'
-import { useRouter } from 'vue-router'
 
 import ChatMessageList from 'src/components/chat_message_list/chat_message_list.vue'
 import PostStatusForm from 'src/components/post_status_form/post_status_form.vue'
@@ -68,7 +67,6 @@ export default {
   },
   emits: ['heightChange', 'suspendableStateChange', 'expanded', 'collapsed'],
   setup(props, { emit }) {
-    const router = useRouter()
     const scroller = useScrollPosition()
     const { statusId } = toRefs(props)
 
@@ -97,7 +95,9 @@ export default {
     provide('isExpanded', isExpanded)
     provide('isPage', isPage)
     provide('expandable', true)
-    watch(expanded, (val) => val ? emit('expanded') : emit('collapsed'), { flush: 'post' })
+    watch(expanded, (val) => (val ? emit('expanded') : emit('collapsed')), {
+      flush: 'post',
+    })
 
     // # Main things
     const {
@@ -105,7 +105,6 @@ export default {
       conversationId,
       setFocused,
       currentStatus,
-      mainStatus,
       conversation,
       replies,
       getReplies,
@@ -115,17 +114,9 @@ export default {
     const conversationLite = computed(() =>
       conversation.value.map(({ id }) => ({ id })),
     )
-    const mainStatusId = computed(() => mainStatus.value.id)
-
-    watch(
-      expanded,
-      (value) => {
-        if (value) {
-          fetchConversation()
-        }
-      },
-      { flush: 'post' },
-    )
+    provide('focusedId', focusedId)
+    provide('conversation', conversation)
+    provide('replies', replies)
 
     // Component created
     if (isPage.value) {
@@ -149,7 +140,7 @@ export default {
       return result
     }
 
-    // External virtual scrolling
+    // # External virtual scrolling
     const unsuspendableIds = ref(new Set())
     const suspendable = computed(
       () => !isExpanded.value && unsuspendableIds.value.size === 0,
@@ -176,32 +167,30 @@ export default {
       emit('suspendableStateChange', { suspend: value, id: statusId.value }),
     )
     onUnmounted(() => resizeObserver.value.disconnect())
-    // Internal virtual scrolling
+
+    // # Internal virtual scrolling
     const virtualScrollingEnabled = ref(isExpanded.value)
 
     // Placeholder heights.
     const { fontSize, navbarSize, panelHeaderSize } = useInterfaceSizes()
-    const mutedStatusHeight = computed(() => fontSize.value * 1.5)
     const normalStatusHeight = computed(() => fontSize.value * 10)
-    const getPlaceholderHeight = (id) =>
-      conversation.value.find((item) => item.id === id)?.muted
-        ? mutedStatusHeight
-        : normalStatusHeight
+    const getPlaceholderHeight = (id) => normalStatusHeight
     const offset = computed(() => {
       // The fontsize after navbar is the little gap between navbar and content
       if (isPage.value) {
         return navbarSize.value + fontSize.value + panelHeaderSize.value
       } else if (expanded.value) {
-        return navbarSize.value + fontSize.value + panelHeaderSize.value * 2 + rootElementMargin.value
+        return (
+          navbarSize.value +
+          fontSize.value +
+          panelHeaderSize.value * 2 +
+          rootElementMargin.value
+        )
       } else {
         return navbarSize.value + fontSize.value
       }
     })
 
-    const anchorIds = computed(
-      () => new Set([mainStatus.value?.id, currentStatus.value?.id]),
-    )
-
     // # Linear style stuff
     const isLinearView = computed(() => displayStyle.value !== 'tree')
     const linearElement = useTemplateRef('linear')
@@ -222,8 +211,6 @@ export default {
       offset,
       scrollPositionInstance: scroller,
       scrollCompensation: linearScrollCompensation,
-      anchorIds,
-      collapseMode: 'item',
       getPlaceholderHeight,
     })
     const changeSuspendStateLinearLocal = (e) => {
@@ -301,7 +288,6 @@ export default {
       resetTreeScrollVirtualization()
     })
 
-
     const treeViewIsSimple = computed(
       () => !mergedConfig.value.conversationTreeAdvanced,
     )
@@ -318,8 +304,8 @@ export default {
         return linearScrollTo(ids)
       }
     }
-    const diveIntoStatus = (id) => scrollTo(new Set([id]))
-    const diveToTopLevel = () => scrollTo(new Set([currentAncestors.value[0].id]))
+    const diveIntoStatus = (id) => setFocused(id)
+    const diveToTopLevel = () => setFocused(currentAncestors.value[0].id)
 
     watch(focusedId, async (neu, old) => {
       // Ignoring initial update (null -> id) since that is handled by scroll compensation
diff --git a/src/components/conversation/conversation.vue b/src/components/conversation/conversation.vue
index b6fd34ebb..893d84591 100644
--- a/src/components/conversation/conversation.vue
+++ b/src/components/conversation/conversation.vue
@@ -125,7 +125,7 @@
           </template>
         </div>
         <ThreadTree
-          :status-id="currentStatus.id"
+          :status-id="focusedId ?? currentStatus.id"
           :depth="0"
 
           @goto="setFocused"
diff --git a/src/components/status/status.js b/src/components/status/status.js
index ec685b0d2..79c6f4050 100644
--- a/src/components/status/status.js
+++ b/src/components/status/status.js
@@ -192,6 +192,9 @@ const Status = {
     user() {
       return useUsersStore().findUser(this.mainStatus.user.id)
     },
+    isTreeView() {
+      return this.mergedConfig.conversationDisplay === 'tree'
+    },
     simpleTree() {
       return !this.mergedConfig.conversationTreeAdvanced
     },
@@ -312,6 +315,7 @@ const Status = {
     hasMentionsLine() {
       return this.mentionsLine.length > 0
     },
+    // TODO move muting logic into some store
     muteReasons() {
       return [
         this.userIsMuted ? 'user' : null,
diff --git a/src/components/status/status.vue b/src/components/status/status.vue
index fa288145f..0306ff2cb 100644
--- a/src/components/status/status.vue
+++ b/src/components/status/status.vue
@@ -235,7 +235,7 @@
                   />
                 </button>
                 <button
-                  v-if="isExpanded && !simpleTree"
+                  v-if="isExpanded && isTreeView && !simpleTree"
                   class="button-unstyled"
                   :title="$t('status.show_only_conversation_under_this')"
                   @click.prevent="$emit('dive')"
diff --git a/src/components/timeline/timeline.js b/src/components/timeline/timeline.js
index 3dd50ba7c..37e9bbe48 100644
--- a/src/components/timeline/timeline.js
+++ b/src/components/timeline/timeline.js
@@ -8,7 +8,6 @@ import {
   toRefs,
   useTemplateRef,
   watch,
-  nextTick,
 } from 'vue'
 import { useI18n } from 'vue-i18n'
 
@@ -70,7 +69,7 @@ const Timeline = {
     })
 
     // Virtual scrolling
-    const { fontSize, navbarSize, panelHeaderSize } = useInterfaceSizes()
+    const { fontSize, navbarSize } = useInterfaceSizes()
 
     // Placeholder heights.
     const mutedStatusHeight = computed(() => fontSize.value * 1.5)
@@ -83,17 +82,13 @@ const Timeline = {
     const body = useTemplateRef('timeline')
     const offset = computed(() => {
       if (embedded.value) {
-      // The fontsize after navbar is the little gap between navbar and content
+        // The fontsize after navbar is the little gap between navbar and content
         return navbarSize.value + fontSize.value
       } else {
         return 0
       }
     })
-    const {
-      heightChart,
-      changeSuspendState,
-      updateVirtualHeight,
-    } =
+    const { heightChart, changeSuspendState, updateVirtualHeight } =
       useVirtualScrolling({
         name: 'Timeline',
         enabled: ref(true),
diff --git a/src/composables/useConversation.js b/src/composables/useConversation.js
index 8bb25fdbd..c1d07228f 100644
--- a/src/composables/useConversation.js
+++ b/src/composables/useConversation.js
@@ -1,5 +1,5 @@
 import { storeToRefs } from 'pinia'
-import { computed, provide, ref, watch, nextTick } from 'vue'
+import { computed, nextTick, ref, toValue, watch } from 'vue'
 
 import { useMergedConfigStore } from 'src/stores/merged_config.js'
 import { useOAuthStore } from 'src/stores/oauth.js'
@@ -17,7 +17,6 @@ import { WSConnectionStatus } from 'src/api/websocket.js'
 export function useConversation(statusId, expanded) {
   const loadError = ref(null)
   const { status: currentStatus, mainStatus } = useMainStatus(statusId)
-  const mainStatusId = computed(() => mainStatus.value?.id)
 
   // # Config
   const { mergedConfig } = storeToRefs(useMergedConfigStore())
@@ -51,10 +50,9 @@ export function useConversation(statusId, expanded) {
       return idA < idB ? -1 : 1
     }
   }
-  const fullConversation = ref(new Set([mainStatus.value?.id].filter(Boolean)))
   const fullyLoaded = ref(false)
   const conversationId = computed(
-    () => mainStatus.value?.statusnet_conversation_id,
+    () => mainStatus.value?.statusnet_conversation_id ?? null,
   )
   watch(conversationId, (neu, old) => {
     if (neu !== old) fullyLoaded.value = false
@@ -64,11 +62,45 @@ export function useConversation(statusId, expanded) {
       return []
     }
 
-    if (!expanded.value) {
+    if (!toValue(expanded) || !fullyLoaded.value) {
       return [currentStatus.value]
     }
 
-    return [...fullConversation.value.keys()]
+    /* It took me a week or so to figure this out.
+     *
+     * Virtual scrolling can compensate for posts being prepended to content,
+     * and prepended posts changing height. The problem is that it has to happen
+     * in prepended (i.e. either above visible post and/or above screen boundary)
+     *
+     * Here's the problem: showing conversation from store can be broken. UI might
+     * already know that some posts belong to a conversation, because you were
+     * mentioned in it, but doesn't know the rest of it. It ends up displaying this
+     * "partial" conversation, and then the rest loads in.
+     *
+     * Problem is, this partial conversation can be very fragmented, with missing
+     * pieces appearing in-between posts. These pieces don't have proper heights
+     * assigned to them yet but their neigbours do and neither me nor virtual
+     * scrolling knows how to compensate for it, it ends up either not compensating
+     * or compensating wrong.
+     *
+     * Using "fullyLoaded" ref helps with this, to ensure that we have stable
+     * conversation expansion process of focused post -> entire convo
+     *
+     * With fullyLoaded:
+     * **id:3** -> id:1 id:2 id:3 id:4 id:5 id:6
+     *
+     * Without fullyLoaded:
+     * id:1 **id:3** id:5 -> id:1 id:2 **id:3** id:4 id:5 id:6
+     * (focused post is **id:3**)
+     *
+     * After initial load, fullyLoaded remains true, allowing newer updates to
+     * appear in conversation.
+     */
+    const fullConversation = useStatusesStore().conversations.get(
+      conversationId.value,
+    )
+
+    return [...fullConversation.keys()]
       .map((k) => useStatusesStore().allStatuses.get(k))
       .filter((status) => status.type != 'repeat') // Old backend behavior?
       .toSorted(sortById)
@@ -92,8 +124,6 @@ export function useConversation(statusId, expanded) {
     ),
   )
   const getReplies = (id) => replies.value.get(id) ?? new Set()
-  provide('conversation', conversation)
-  provide('replies', replies)
 
   const fetchConversation = async () => {
     if (currentStatus.value) {
@@ -101,7 +131,7 @@ export function useConversation(statusId, expanded) {
         data: { ancestors, descendants },
         timestamp,
       } = await apiFetchConversation({
-        id: statusId.value,
+        id: toValue(statusId),
         credentials: useOAuthStore().token,
       })
 
@@ -111,12 +141,6 @@ export function useConversation(statusId, expanded) {
         timestamp,
       })
 
-      fullConversation.value = new Set([
-        ...ancestors,
-        mainStatus.value,
-        ...descendants
-      ].map(({ id }) => id))
-
       await nextTick()
       fullyLoaded.value = true
     } else {
@@ -124,14 +148,12 @@ export function useConversation(statusId, expanded) {
         loadError.value = null
 
         const { data: status } = await apiFetchStatus({
-          id: statusId.value,
+          id: toValue(statusId),
           credentials: useOAuthStore().token,
         })
 
         useStatusesStore().addNewStatuses({ statuses: [status] })
-        fullConversation.value = new Set([
-          currentStatus.value,
-        ].map(({ id }) => id))
+
         fetchConversation()
       } catch (error) {
         console.error(error)
@@ -140,6 +162,16 @@ export function useConversation(statusId, expanded) {
     }
   }
 
+  watch(
+    expanded,
+    (value) => {
+      if (value) {
+        fetchConversation()
+      }
+    },
+    { flush: 'post' },
+  )
+
   // # Focus
   const focused = ref(null)
   const { mainStatus: focusedStatus } = useMainStatus(focused)
@@ -148,28 +180,29 @@ export function useConversation(statusId, expanded) {
   }
   watch(statusId, (val) => setFocused(val), { immediate: true })
 
-  const focusedId = computed(() => (expanded.value && fullyLoaded.value) ? focusedStatus.value?.id : null)
-  provide('focusedId', focusedId)
+  const focusedId = computed(() =>
+    toValue(expanded) && fullyLoaded.value ? focusedStatus.value?.id : null,
+  )
 
   watch(
-    focusedStatus,
+    focusedId,
     (newVal, oldVal) => {
       if (!newVal) return
-      if (newVal?.id === oldVal?.id) return // prevents infinite loop
+      if (newVal === oldVal) return // prevents infinite loop
       if (!streamingEnabled.value) {
-        useStatusesStore().fetchStatus(newVal.id)
+        useStatusesStore().fetchStatus(newVal)
       }
 
-      useStatusesStore().fetchFavsAndRepeats(newVal.id)
-      useStatusesStore().fetchEmojiReactions(newVal.id)
+      useStatusesStore().fetchFavsAndRepeats(newVal)
+      useStatusesStore().fetchEmojiReactions(newVal)
     },
     { immediate: true },
   )
 
   return {
     focusedId,
-    conversationId,
     setFocused,
+    conversationId,
     currentStatus,
     mainStatus,
     conversation,
diff --git a/src/composables/useInterfaceSizes.js b/src/composables/useInterfaceSizes.js
index baf567913..cd349e7c1 100644
--- a/src/composables/useInterfaceSizes.js
+++ b/src/composables/useInterfaceSizes.js
@@ -20,17 +20,17 @@ export function useInterfaceSizes() {
   watch(fontSizeSetting, updateFontSize, { immediate: true })
 
   const navbarSize = computed(() => {
-    const string =
-      window.getComputedStyle(document.body).getPropertyValue('--navbarSize')
+    const string = window
+      .getComputedStyle(document.body)
+      .getPropertyValue('--navbarSize')
 
     return fontSize.value * Number.parseInt(string.slice(0, -3), 10) // remove the 'rem'
   })
 
   const panelHeaderSize = computed(() => {
-    const string =
-      window
-        .getComputedStyle(document.body)
-        .getPropertyValue('--panelHeaderSize')
+    const string = window
+      .getComputedStyle(document.body)
+      .getPropertyValue('--panelHeaderSize')
 
     return fontSize.value * Number.parseInt(string.slice(0, -3), 10) // remove the 'rem'
   })
diff --git a/src/composables/useMainStatus.js b/src/composables/useMainStatus.js
index d778d3df7..dbf94d5c8 100644
--- a/src/composables/useMainStatus.js
+++ b/src/composables/useMainStatus.js
@@ -1,13 +1,12 @@
 import { computed, toValue } from 'vue'
-import { storeToRefs } from 'pinia'
 
 import { useStatusesStore } from 'src/stores/statuses.js'
 
 export function useMainStatus(statusId) {
-  const statusesStore = storeToRefs(useStatusesStore())
-  const getStatusObject = (id) => statusesStore.allStatuses.value.get(id)
+  const statusesStore = useStatusesStore()
+  const getStatusObject = (id) => statusesStore.allStatuses.get(id)
 
-  const status = computed(() => getStatusObject(statusId.value))
+  const status = computed(() => getStatusObject(toValue(statusId)) ?? null)
 
   const mainStatus = computed(() => {
     if (!status.value) return null
diff --git a/src/composables/useScrollPosition.js b/src/composables/useScrollPosition.js
index e0613d9fb..243c08c8b 100644
--- a/src/composables/useScrollPosition.js
+++ b/src/composables/useScrollPosition.js
@@ -1,7 +1,5 @@
 import { onMounted, onUnmounted, ref } from 'vue'
 
-import { useWindowSize } from 'src/composables/useWindowSize.js'
-
 export function useScrollPosition() {
   const x = ref(0)
   const y = ref(0)
@@ -26,25 +24,5 @@ export function useScrollPosition() {
     inProgress.value = false
   }
 
-  const scrollIntoView = async (element, options) => {
-    if (element == null) throw new TypeError(`Element is ${element}!`)
-    inProgress.value = true
-    if (!element.scrollIntoViewIfNeeded) {
-      const { height: windowHeight } = useWindowSize()
-      const { top, height } = element.getBoundingClientRect()
-      const bottom = top + height
-
-      const biggerThanScreen = height > windowHeight
-      const aboveTop = top < 0
-      const belowBottom = bottom > windowHeight.value
-      if (aboveTop || belowBottom || biggerThanScreen) {
-        await element.scrollIntoView(options)
-      }
-    } else {
-      await element.scrollIntoViewIfNeeded(options)
-    }
-    inProgress.value = false
-  }
-
-  return { x, y, scrollBy, scrollIntoView, inProgress }
+  return { x, y, scrollBy, inProgress }
 }
diff --git a/src/composables/useTreeConversationTopology.js b/src/composables/useTreeConversationTopology.js
index 686ede06c..b1baed998 100644
--- a/src/composables/useTreeConversationTopology.js
+++ b/src/composables/useTreeConversationTopology.js
@@ -1,12 +1,12 @@
 import { storeToRefs } from 'pinia'
-import { computed, ref } from 'vue'
+import { computed, ref, toValue } from 'vue'
 
 import { useMergedConfigStore } from 'src/stores/merged_config.js'
 import { useStatusesStore } from 'src/stores/statuses.js'
 
 export function useTreeConversationTopology(conversation, replies, current) {
   const getStatusObject = (id) => useStatusesStore().allStatuses.get(id)
-  const getReplies = (id) => replies.value.get(id) ?? new Set()
+  const getReplies = (id) => toValue(replies).get(id) ?? new Set()
 
   const { mergedConfig } = storeToRefs(useMergedConfigStore())
 
@@ -21,12 +21,12 @@ export function useTreeConversationTopology(conversation, replies, current) {
   const ancestors = computed(() => {
     // First we fill map with empty sets and add given id's parent
     // as set's only element (if any)
-    const parentMap = conversation.value.reduce(
+    const parentMap = toValue(conversation).reduce(
       (result, { id, in_reply_to_status_id: irid }) => {
         if (!result.has(id)) {
           result.set(id, new Set())
         }
-        if (irid && conversation.value.length !== 1) {
+        if (irid && toValue(conversation).length !== 1) {
           // Setting parent for current item
           result.get(id).add(irid)
         }
@@ -48,22 +48,27 @@ export function useTreeConversationTopology(conversation, replies, current) {
     })
     return parentMap
   })
-  const topLevel = computed(() =>
+  const topLevelIds = computed(() =>
     [...ancestors.value.entries()]
       .filter(([id, ancestors]) => ancestors.size === 0)
-      .map(([id]) => getStatusObject(id)),
+      .map(([id]) => id),
+  )
+  const topLevel = computed(() =>
+    topLevelIds.value.map((id) => getStatusObject(id)),
   )
   const getAncestorIds = (id) => ancestors.value.get(id) ?? new Set()
   const getAncestors = (id) =>
     [...getAncestorIds(id)].map(getStatusObject).filter(Boolean)
-  const currentAncestors = computed(() => getAncestors(current.value).reverse())
+  const currentAncestors = computed(() =>
+    getAncestors(toValue(current)).reverse(),
+  )
   const currentDepth = computed(() => currentAncestors.value.length)
 
   // Thread Display, for collapsing/expanding tree branches
   // Map of id => 'showing' | 'hidden'
   const threadDisplayOverride = ref(new Map())
   const threadDisplayDefault = computed(() => {
-    return conversation.value.reduce((map, status) => {
+    return toValue(conversation).reduce((map, status) => {
       const { id } = status
       const depth = ancestors.value.get(id).size
 
@@ -107,5 +112,8 @@ export function useTreeConversationTopology(conversation, replies, current) {
     threadDisplay,
     showThreadRecursively,
     resetThreadDisplay,
+
+    // For testing
+    ancestors,
   }
 }
diff --git a/src/composables/useVirtualScrolling.js b/src/composables/useVirtualScrolling.js
index 8f9fadff9..7d76a632e 100644
--- a/src/composables/useVirtualScrolling.js
+++ b/src/composables/useVirtualScrolling.js
@@ -26,8 +26,6 @@ export function useVirtualScrolling({
   // - 'item' - same as height but uses anchor element's top offset
   //   instead of whole height
   collapseMode,
-  // Anchor. Set of IDs of element relative to which do scroll compensation
-  anchorIds,
   // Placeholder height specification. Must be a function.
   // function will be called either:
   // - without arguments (for generic placeholder, i.e. buffer zone size)
@@ -215,10 +213,6 @@ export function useVirtualScrolling({
             const newBottomElement = last(newVal)
 
             return newBottomElement.top + newBottomElement.height
-          } else if (toValue(collapseMode) === 'item') {
-            const element = newVal.find(({ id }) => toValue(anchorIds).has(id))
-
-            return element.top
           } else {
             return 0
           }
@@ -241,19 +235,21 @@ export function useVirtualScrolling({
 
           const expansion = (() => {
             if (newVal.length < oldVal.length) return 0
-            const oldVisible = oldVal.filter((item) => checkVisible(item) && item.real)
+            const oldVisible = oldVal.filter(
+              (item) => checkVisible(item) && item.real,
+            )
             const oldItem = first(oldVisible)
             if (!oldItem) return 0 // probably out of bounds in timeline
             const oldItemUpdated = newVal.find(({ id }) => id === oldItem.id)
 
             return (
               oldItemUpdated.top -
-                oldItem.top -
-                (oldItem.height - oldItemUpdated.height)
+              oldItem.top -
+              (oldItem.height - oldItemUpdated.height)
             )
           })()
 
-          const collapsing  = (() => {
+          const collapsing = (() => {
             if (newVal.length >= oldVal.length) return 0
             const newVisible = newVal
             const newItem = first(newVisible)
@@ -262,8 +258,8 @@ export function useVirtualScrolling({
 
             return (
               newItem.top -
-                newItemBefore.top -
-                (newItemBefore.height - newItem.height)
+              newItemBefore.top -
+              (newItemBefore.height - newItem.height)
             )
           })()
 
@@ -295,7 +291,10 @@ export function useVirtualScrolling({
 
     const element = heightChart.value.find(({ id }) => anchors.has(id))
     const elementMiddle = element.top + element.height / 2
-    const desiredTopBoundary = Math.min(element.top, elementMiddle - (windowHeight.value - offset.value) / 2)
+    const desiredTopBoundary = Math.min(
+      element.top,
+      elementMiddle - (windowHeight.value - offset.value) / 2,
+    )
 
     scrollBy(0, desiredTopBoundary - topScrollBoundary.value)
 
diff --git a/test/fixtures/masto_api.js b/test/fixtures/masto_api.js
new file mode 100644
index 000000000..59feaa38e
--- /dev/null
+++ b/test/fixtures/masto_api.js
@@ -0,0 +1,93 @@
+export const userId = '1'
+export const userScreenName = 'user'
+export const userName = 'Guy'
+export const userUrl = 'http://localhost/user'
+
+export const fetchOptions = (url, method = 'GET') => [
+  url,
+  {
+    method,
+    credentials: 'same-origin',
+    headers: {
+      Accept: 'application/json',
+      'Content-Type': 'application/json',
+    },
+  },
+]
+
+export const mockMastoAPIUser = ({
+  screen_name = userScreenName,
+  name = userName,
+  url = userUrl,
+  id = userId,
+} = {}) => ({
+  id,
+  acct: screen_name,
+  display_name: name,
+  fields: [],
+  avatar: '',
+  url,
+  pleroma: {
+    emoji_reactions: [],
+  },
+})
+
+export const mockMastoAPIStatus = ({
+  id = '1',
+  text,
+  type = 'status',
+  statusUser = mockMastoAPIUser(),
+  in_reply_to_status_id = null,
+  statusnet_conversation_id = 'c1',
+} = {}) => ({
+  id,
+  account: statusUser,
+  name: 'status',
+  content: text ?? `Text number ${id}`,
+  uri: '',
+  type,
+  attentions: [],
+  pleroma: {
+    conversation_id: statusnet_conversation_id,
+  },
+  in_reply_to_id: in_reply_to_status_id,
+})
+
+export const mockUser = ({
+  screen_name = userScreenName,
+  id = userId,
+  name = userName,
+  url = userUrl,
+} = {}) => ({
+  _original: mockMastoAPIUser({
+    screen_name,
+    id,
+    name,
+    url,
+  }),
+  id,
+  name,
+  screen_name,
+  url,
+  relationship: undefined,
+})
+
+export const mockStatus = ({
+  id = '1',
+  text,
+  type = 'status',
+  statusUser = mockUser(),
+  in_reply_to_status_id = null,
+  statusnet_conversation_id = 'c1',
+} = {}) => ({
+  id,
+  user: statusUser,
+  name: 'status',
+  text: text ?? `Text number ${id}`,
+  uri: '',
+  type,
+  attentions: [],
+  statusnet_conversation_id,
+  emoji_reactions: [],
+  in_reply_to_status_id,
+})
diff --git a/test/unit/specs/composables/useConversation.spec.js b/test/unit/specs/composables/useConversation.spec.js
new file mode 100644
index 000000000..cb274ef2a
--- /dev/null
+++ b/test/unit/specs/composables/useConversation.spec.js
@@ -0,0 +1,316 @@
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+import { mockMastoAPIStatus, mockStatus } from 'test/fixtures/masto_api.js'
+import { ref } from 'vue'
+
+import { useStatusesStore } from 'src/stores/statuses.js'
+
+import { useConversation } from 'src/composables/useConversation.js'
+
+import {
+  MASTODON_STATUS_CONTEXT_URL,
+  MASTODON_STATUS_FAVORITEDBY_URL,
+  MASTODON_STATUS_REBLOGGEDBY_URL,
+  MASTODON_STATUS_URL,
+  PLEROMA_EMOJI_REACTIONS_URL,
+} from 'src/api/public.js'
+
+describe('useConversation', () => {
+  const constructStatus = (index, convoId = '1000') => {
+    const stringId = index.toString()
+    const object = { id: stringId, statusnet_conversation_id: convoId }
+    if (index > 0) {
+      object.in_reply_to_status_id = (index - 1).toString()
+    }
+
+    return mockStatus(object)
+  }
+  const constructStatusAPI = (index, convoId = '1000') => {
+    const stringId = index.toString()
+    const object = { id: stringId, statusnet_conversation_id: convoId }
+    if (index > 0) {
+      object.in_reply_to_status_id = (index - 1).toString()
+    }
+
+    return mockMastoAPIStatus(object)
+  }
+
+  beforeEach(() => {
+    setActivePinia(createTestingPinia({ stubActions: false }))
+    vi.useFakeTimers()
+    useStatusesStore().resetStatuses()
+  })
+  afterEach(() => {
+    vi.useRealTimers()
+    vi.resetAllMocks()
+  })
+
+  it('should work if status is unknown yet', () => {
+    useStatusesStore().allStatuses = new Map()
+
+    const result = useConversation(ref('1'), ref(false))
+
+    expect(result.focusedId.value).to.eql(null)
+    expect(result.currentStatus.value).to.eql(null)
+    expect(result.mainStatus.value).to.eql(null)
+    expect(result.replies.value).to.eql(new Map())
+    expect(result.conversationId.value).to.eql(null)
+    expect(result.conversation.value).to.eql([])
+    expect(result.loadError.value).to.eql(null)
+  })
+
+  it('should return single item that is already known when not expanded', () => {
+    useStatusesStore().allStatuses = new Map(
+      [...new Array(20)].map((i, index) => [
+        index.toString(),
+        constructStatus(index),
+      ]),
+    )
+
+    const result = useConversation(ref('1'), ref(false))
+    const expectedStatus = constructStatus(1)
+
+    expect(result.focusedId.value).to.eql(null)
+    expect(result.currentStatus.value).to.eql(expectedStatus)
+    expect(result.mainStatus.value).to.eql(expectedStatus)
+    expect(result.conversation.value).to.eql([expectedStatus])
+    expect(result.conversationId.value).to.eql('1000')
+  })
+
+  it('should return entire conversation when fethed', async () => {
+    const convoAPI = [...new Array(20)].map((i, index) =>
+      constructStatusAPI(index),
+    )
+
+    const mockFetch = vi.fn()
+    vi.when(mockFetch, { onUnmatched: 'throw' })
+      .calledWith(MASTODON_STATUS_URL('4'), expect.anything())
+      .thenResolveOnce(
+        new Response(JSON.stringify(convoAPI[4]), {
+          headers: { 'Content-Type': 'application/json' },
+        }),
+      )
+      .calledWith(MASTODON_STATUS_CONTEXT_URL('4'), expect.anything())
+      .thenResolveOnce(
+        new Response(
+          JSON.stringify({
+            ancestors: convoAPI.slice(0, 4),
+            descendants: convoAPI.slice(5),
+          }),
+          {
+            headers: { 'Content-Type': 'application/json' },
+          },
+        ),
+      )
+    vi.stubGlobal('fetch', mockFetch)
+
+    const result = useConversation(ref('4'), ref(true))
+    await result.fetchConversation()
+
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_URL('4'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(1)
+    expect(result.conversation.value[0]).to.have.property('id', '4')
+    expect(result.conversationId.value).to.have.eql('1000')
+
+    await vi.advanceTimersToNextTimerAsync()
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_CONTEXT_URL('4'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(20)
+    expect(result.conversation.value[0]).to.have.property('id', '0')
+  })
+
+  it('should fetch entire conversation when expanded', async () => {
+    const convo = [...new Array(20)].map((i, index) => constructStatus(index))
+    const convoAPI = [...new Array(20)].map((i, index) =>
+      constructStatusAPI(index),
+    )
+    useStatusesStore().addNewStatuses({
+      statuses: [convo[4]],
+      timestamp: Date.now(),
+    })
+
+    const mockFetch = vi.fn()
+    vi.when(mockFetch)
+      .calledWith(MASTODON_STATUS_CONTEXT_URL('4'), expect.anything())
+      .thenResolveOnce(
+        new Response(
+          JSON.stringify({
+            ancestors: convoAPI.slice(0, 4),
+            descendants: convoAPI.slice(5),
+          }),
+          {
+            headers: { 'Content-Type': 'application/json' },
+          },
+        ),
+      )
+    vi.stubGlobal('fetch', mockFetch)
+
+    const expanded = ref(false)
+    const result = useConversation(ref('4'), expanded)
+    expect(result.conversation.value).to.have.length(1)
+    expect(result.conversation.value[0]).to.have.property('id', '4')
+    expect(result.focusedId.value).to.eql(null)
+    expanded.value = true
+    await vi.advanceTimersToNextTimerAsync()
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_CONTEXT_URL('4'),
+      expect.anything(),
+    )
+    await vi.advanceTimersToNextTimerAsync()
+    expect(result.focusedId.value).to.eql('4')
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_FAVORITEDBY_URL('4'),
+      expect.anything(),
+    )
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_REBLOGGEDBY_URL('4'),
+      expect.anything(),
+    )
+    expect(mockFetch).to.have.been.calledWith(
+      PLEROMA_EMOJI_REACTIONS_URL('4'),
+      expect.anything(),
+    )
+    await vi.advanceTimersToNextTimerAsync()
+    expect(result.conversation.value).to.have.length(20)
+    expect(result.conversation.value[0]).to.have.property('id', '0')
+  })
+
+  it('should reset and fetch another conversation when statusId changes', async () => {
+    const aConvoAPI = [...new Array(20)].map((i, index) =>
+      constructStatusAPI(index + 'a', '1000'),
+    )
+    const bConvoAPI = [...new Array(20)].map((i, index) =>
+      constructStatusAPI(index + 'b', '2000'),
+    )
+
+    const mockFetch = vi.fn()
+    vi.when(mockFetch, { onUnmatched: 'throw' })
+      .calledWith(MASTODON_STATUS_URL('4a'), expect.anything())
+      .thenResolveOnce(
+        new Response(JSON.stringify(aConvoAPI[4]), {
+          headers: { 'Content-Type': 'application/json' },
+        }),
+      )
+      .calledWith(MASTODON_STATUS_CONTEXT_URL('4a'), expect.anything())
+      .thenResolveOnce(
+        new Response(
+          JSON.stringify({
+            ancestors: aConvoAPI.slice(0, 4),
+            descendants: aConvoAPI.slice(5),
+          }),
+          {
+            headers: { 'Content-Type': 'application/json' },
+          },
+        ),
+      )
+      .calledWith(MASTODON_STATUS_URL('4b'), expect.anything())
+      .thenResolveOnce(
+        new Response(JSON.stringify(bConvoAPI[4]), {
+          headers: { 'Content-Type': 'application/json' },
+        }),
+      )
+      .calledWith(MASTODON_STATUS_CONTEXT_URL('4b'), expect.anything())
+      .thenResolveOnce(
+        new Response(
+          JSON.stringify({
+            ancestors: bConvoAPI.slice(0, 4),
+            descendants: bConvoAPI.slice(5),
+          }),
+          {
+            headers: { 'Content-Type': 'application/json' },
+          },
+        ),
+      )
+    vi.stubGlobal('fetch', mockFetch)
+
+    const statusId = ref('4a')
+
+    const result = useConversation(statusId, true)
+    await result.fetchConversation()
+
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_URL('4a'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(1)
+    expect(result.conversation.value[0]).to.have.property('id', '4a')
+    expect(result.conversationId.value).to.have.eql('1000')
+
+    await vi.advanceTimersToNextTimerAsync()
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_CONTEXT_URL('4a'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(20)
+    expect(result.conversation.value[0]).to.have.property('id', '0a')
+
+    statusId.value = '4b'
+
+    await vi.advanceTimersToNextTimerAsync()
+    expect(result.conversation.value).to.have.length(0)
+
+    await vi.advanceTimersToNextTimerAsync()
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_URL('4b'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(1)
+    expect(result.conversation.value[0]).to.have.property('id', '4b')
+    expect(result.conversationId.value).to.have.eql('2000')
+
+    await vi.advanceTimersToNextTimerAsync()
+    expect(mockFetch).to.have.been.calledWith(
+      MASTODON_STATUS_CONTEXT_URL('4b'),
+      expect.anything(),
+    )
+    expect(result.conversation.value).to.have.length(20)
+    expect(result.conversation.value[0]).to.have.property('id', '0b')
+  })
+
+  it('should form replies object', async () => {
+    const convo = [...new Array(4)].map((i, index) => constructStatus(index))
+    const convoAPI = [...new Array(4)].map((i, index) =>
+      constructStatusAPI(index),
+    )
+    useStatusesStore().addNewStatuses({
+      statuses: convo,
+      timestamp: Date.now(),
+    })
+
+    const mockFetch = vi.fn()
+    vi.when(mockFetch)
+      .calledWith(MASTODON_STATUS_CONTEXT_URL('2'), expect.anything())
+      .thenResolveOnce(
+        new Response(
+          JSON.stringify({
+            ancestors: convoAPI.slice(0, 1),
+            descendants: convoAPI.slice(2),
+          }),
+          {
+            headers: { 'Content-Type': 'application/json' },
+          },
+        ),
+      )
+    vi.stubGlobal('fetch', mockFetch)
+
+    const result = useConversation('2', true)
+    await result.fetchConversation()
+
+    await vi.advanceTimersToNextTimerAsync()
+    await vi.advanceTimersToNextTimerAsync()
+    await vi.advanceTimersToNextTimerAsync()
+    expect(result.conversation.value).to.have.length(4)
+    expect(result.replies.value).to.eql(
+      new Map([
+        ['0', new Set([{ name: '#1', id: '1' }])],
+        ['1', new Set([{ name: '#2', id: '2' }])],
+        ['2', new Set([{ name: '#3', id: '3' }])],
+      ]),
+    )
+  })
+})
diff --git a/test/unit/specs/composables/useMainStatus.spec.js b/test/unit/specs/composables/useMainStatus.spec.js
new file mode 100644
index 000000000..f6bf4139d
--- /dev/null
+++ b/test/unit/specs/composables/useMainStatus.spec.js
@@ -0,0 +1,30 @@
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+
+import { useStatusesStore } from 'src/stores/statuses.js'
+
+import { useMainStatus } from 'src/composables/useMainStatus.js'
+
+describe('useMainStatus', () => {
+  beforeEach(() => {
+    setActivePinia(createTestingPinia())
+    useStatusesStore().allStatuses = new Map([
+      [1, { id: 1 }],
+      [2, { id: 2, retweeted_status: { id: 1 } }],
+    ])
+  })
+
+  it('non-repeat', () => {
+    const { status, mainStatus } = useMainStatus(1)
+
+    expect(status.value).to.eql({ id: 1 })
+    expect(mainStatus.value).to.eql({ id: 1 })
+  })
+
+  it('repeat', () => {
+    const { status, mainStatus } = useMainStatus(2)
+
+    expect(status.value).to.eql({ id: 2, retweeted_status: { id: 1 } })
+    expect(mainStatus.value).to.eql({ id: 1 })
+  })
+})
diff --git a/test/unit/specs/composables/useTreeConversationTopology.spec.js b/test/unit/specs/composables/useTreeConversationTopology.spec.js
new file mode 100644
index 000000000..59528be54
--- /dev/null
+++ b/test/unit/specs/composables/useTreeConversationTopology.spec.js
@@ -0,0 +1,163 @@
+import { createTestingPinia } from '@pinia/testing'
+import { setActivePinia } from 'pinia'
+
+import { useMergedConfigStore } from 'src/stores/merged_config.js'
+import { useStatusesStore } from 'src/stores/statuses.js'
+
+import { useTreeConversationTopology } from 'src/composables/useTreeConversationTopology.js'
+
+describe('useTreeConversationTopology', () => {
+  const conversation = [
+    {
+      id: 1,
+    },
+    {
+      id: 2,
+      in_reply_to_status_id: 1,
+    },
+    {
+      id: 3,
+      in_reply_to_status_id: 2,
+    },
+    {
+      id: 4,
+      in_reply_to_status_id: 1,
+    },
+    {
+      id: 5,
+      in_reply_to_status_id: 4,
+    },
+    {
+      id: 6,
+      in_reply_to_status_id: 3,
+    },
+  ]
+  const replies = new Map([
+    [1, new Set([{ id: 2 }, { id: 4 }])],
+    [2, new Set([{ id: 3 }])],
+    [3, new Set([{ id: 6 }])],
+    [4, new Set([{ id: 5 }])],
+    [6, new Set([])],
+  ])
+
+  beforeEach(() => {
+    setActivePinia(createTestingPinia())
+    useStatusesStore().allStatuses = new Map(
+      conversation.map(({ id }) => [id, { id }]),
+    )
+  })
+
+  it('should form a correct topology', () => {
+    const { topLevel, ancestors, currentAncestors } =
+      useTreeConversationTopology(conversation, null, 3)
+
+    expect(ancestors.value).to.eql(
+      new Map([
+        [1, new Set()],
+        [2, new Set([1])],
+        [3, new Set([2, 1])],
+        [4, new Set([1])],
+        [5, new Set([4, 1])],
+        [6, new Set([3, 2, 1])],
+      ]),
+    )
+    expect(currentAncestors.value).to.eql([{ id: 1 }, { id: 2 }])
+    expect(topLevel.value.map(({ id }) => id)).to.eql([1])
+  })
+
+  describe('ThreadDisplay', () => {
+    it('should set default ThreadDisplay with maxDepth 3', () => {
+      useMergedConfigStore().mergedConfig = { maxDepthInThread: 3 }
+
+      const { threadDisplay } = useTreeConversationTopology(conversation)
+
+      expect(threadDisplay.value).to.eql(
+        new Map([
+          [1, 'showing'],
+          [2, 'showing'],
+          [3, 'hidden'],
+          [4, 'showing'],
+          [5, 'hidden'],
+          [6, 'hidden'],
+        ]),
+      )
+    })
+
+    it('should set default ThreadDisplay with maxDepth 6', () => {
+      useMergedConfigStore().mergedConfig = { maxDepthInThread: 6 }
+
+      const { threadDisplay } = useTreeConversationTopology(conversation)
+
+      expect(threadDisplay.value).to.eql(
+        new Map([
+          [1, 'showing'],
+          [2, 'showing'],
+          [3, 'showing'],
+          [4, 'showing'],
+          [5, 'showing'],
+          [6, 'showing'],
+        ]),
+      )
+    })
+
+    it('should set default ThreadDisplay with maxDepth 3 && current depth being 3', () => {
+      useMergedConfigStore().mergedConfig = { maxDepthInThread: 3 }
+
+      const { threadDisplay } = useTreeConversationTopology(
+        conversation,
+        null,
+        4,
+      )
+
+      expect(threadDisplay.value).to.eql(
+        new Map([
+          [1, 'showing'],
+          [2, 'showing'],
+          [3, 'showing'],
+          [4, 'showing'],
+          [5, 'showing'],
+          [6, 'hidden'],
+        ]),
+      )
+    })
+
+    it('should recursively expand thread when calling showThreadRecursively', () => {
+      useMergedConfigStore().mergedConfig = { maxDepthInThread: 3 }
+
+      const { threadDisplay, showThreadRecursively } =
+        useTreeConversationTopology(conversation, replies, 1)
+
+      showThreadRecursively(3)
+      expect(threadDisplay.value).to.eql(
+        new Map([
+          [1, 'showing'],
+          [2, 'showing'],
+          [3, 'showing'],
+          [4, 'showing'],
+          [5, 'hidden'],
+          [6, 'showing'],
+        ]),
+      )
+    })
+
+    it('should reset thread when calling resetThreadDisplay', () => {
+      useMergedConfigStore().mergedConfig = { maxDepthInThread: 3 }
+
+      const { threadDisplay, showThreadRecursively, resetThreadDisplay } =
+        useTreeConversationTopology(conversation, replies, 1)
+
+      showThreadRecursively(3)
+      resetThreadDisplay()
+      expect(threadDisplay.value).to.eql(
+        new Map([
+          [1, 'showing'],
+          [2, 'showing'],
+          [3, 'hidden'],
+          [4, 'showing'],
+          [5, 'hidden'],
+          [6, 'hidden'],
+        ]),
+      )
+    })
+  })
+})
diff --git a/test/unit/specs/stores/statuses.spec.js b/test/unit/specs/stores/statuses.spec.js
index 51247447f..50becc0f0 100644
--- a/test/unit/specs/stores/statuses.spec.js
+++ b/test/unit/specs/stores/statuses.spec.js
@@ -1,6 +1,12 @@
 import { createTestingPinia } from '@pinia/testing'
 import { snakeCase } from 'lodash-es'
 import { setActivePinia } from 'pinia'
+import {
+  mockMastoAPIStatus,
+  mockMastoAPIUser,
+  mockStatus,
+  mockUser,
+} from 'test/fixtures/masto_api.js'
 
 import { useStatusesStore } from 'src/stores/statuses.js'
 import { useStreamingStore } from 'src/stores/streaming.js'
@@ -9,80 +15,6 @@ import { useUsersStore } from 'src/stores/users.js'
 import * as PUBLIC_API from 'src/api/public.js'
 import * as USER_API from 'src/api/user.js'
 
-const userId = '1'
-const userScreenName = 'user'
-const userName = 'Guy'
-const userUrl = 'http://localhost/user'
-
-const mockMastoAPIUser = ({
-  screen_name = userScreenName,
-  name = userName,
-  url = userUrl,
-  id = userId,
-} = {}) => ({
-  id,
-  acct: screen_name,
-  display_name: name,
-  fields: [],
-  avatar: '',
-  url,
-  pleroma: {
-    emoji_reactions: [],
-  },
-})
-
-const mockUser = ({
-  screen_name = userScreenName,
-  id = userId,
-  name = userName,
-  url = userUrl,
-} = {}) => ({
-  _original: mockMastoAPIUser({
-    screen_name,
-    id,
-    name,
-    url,
-  }),
-  id,
-  name,
-  screen_name,
-  url,
-  relationship: undefined,
-})
-
-const mockStatus = ({
-  id = '1',
-  text,
-  type = 'status',
-  statusUser = mockUser(),
-} = {}) => ({
-  id,
-  user: statusUser,
-  name: 'status',
-  text: text ?? `Text number ${id}`,
-  uri: '',
-  type,
-  attentions: [],
-  statusnet_conversation_id: 'c1',
-  emoji_reactions: [],
-})
-
-const mockMastoAPIStatus = ({
-  id = '1',
-  text,
-  type = 'status',
-  statusUser = mockMastoAPIUser(),
-} = {}) => ({
-  id,
-  account: statusUser,
-  name: 'status',
-  content: text ?? `Text number ${id}`,
-  uri: '',
-  type,
-  attentions: [],
-  statusnet_conversation_id: 'c1',
-})
-
 const DEFAULT_OPTIONS = (method = 'GET') => ({
   method,
   credentials: 'same-origin',