diff --git a/lib/hooks/search-threads.js b/lib/hooks/search-threads.js
--- a/lib/hooks/search-threads.js
+++ b/lib/hooks/search-threads.js
@@ -7,7 +7,7 @@
   useFilteredChatListData,
 } from '../selectors/chat-selectors.js';
 import { useThreadSearchIndex } from '../selectors/nav-selectors.js';
-import { sidebarInfoSelector } from '../selectors/thread-selectors.js';
+import { sidebarInfoSelector } from '../selectors/sidebar-selectors.js';
 import { threadIsChannel } from '../shared/thread-utils.js';
 import type { SetState } from '../types/hook-types.js';
 import type {
diff --git a/lib/selectors/chat-selectors.js b/lib/selectors/chat-selectors.js
--- a/lib/selectors/chat-selectors.js
+++ b/lib/selectors/chat-selectors.js
@@ -10,10 +10,10 @@
 import { createObjectSelector } from 'reselect-map';
 
 import {
-  sidebarInfoSelector,
   threadInfoFromSourceMessageIDSelector,
   threadInfoSelector,
 } from './thread-selectors.js';
+import { sidebarInfoSelector } from '../selectors/sidebar-selectors.js';
 import {
   createMessageInfo,
   getMostRecentNonLocalMessageID,
diff --git a/lib/selectors/sidebar-selectors.js b/lib/selectors/sidebar-selectors.js
new file mode 100644
--- /dev/null
+++ b/lib/selectors/sidebar-selectors.js
@@ -0,0 +1,63 @@
+// @flow
+
+import _orderBy from 'lodash/fp/orderBy.js';
+import { createObjectSelector } from 'reselect-map';
+
+import { childThreadInfos } from './thread-selectors.js';
+import { getMostRecentNonLocalMessageID } from '../shared/message-utils.js';
+import { threadInChatList } from '../shared/thread-utils.js';
+import type { MessageStore, RawMessageInfo } from '../types/message-types.js';
+import type { ThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
+import type { BaseAppState } from '../types/redux-types.js';
+import { threadTypes } from '../types/thread-types-enum.js';
+import type { SidebarInfo } from '../types/thread-types.js';
+
+function getMostRecentRawMessageInfo(
+  threadInfo: ThreadInfo,
+  messageStore: MessageStore,
+): ?RawMessageInfo {
+  const thread = messageStore.threads[threadInfo.id];
+  if (!thread) {
+    return null;
+  }
+  for (const messageID of thread.messageIDs) {
+    return messageStore.messages[messageID];
+  }
+  return null;
+}
+
+const sidebarInfoSelector: (state: BaseAppState<>) => {
+  +[id: string]: $ReadOnlyArray<SidebarInfo>,
+} = createObjectSelector(
+  childThreadInfos,
+  (state: BaseAppState<>) => state.messageStore,
+  (childThreads: $ReadOnlyArray<ThreadInfo>, messageStore: MessageStore) => {
+    const sidebarInfos = [];
+    for (const childThreadInfo of childThreads) {
+      if (
+        !threadInChatList(childThreadInfo) ||
+        childThreadInfo.type !== threadTypes.SIDEBAR
+      ) {
+        continue;
+      }
+      const mostRecentRawMessageInfo = getMostRecentRawMessageInfo(
+        childThreadInfo,
+        messageStore,
+      );
+      const lastUpdatedTime =
+        mostRecentRawMessageInfo?.time ?? childThreadInfo.creationTime;
+      const mostRecentNonLocalMessage = getMostRecentNonLocalMessageID(
+        childThreadInfo.id,
+        messageStore,
+      );
+      sidebarInfos.push({
+        threadInfo: childThreadInfo,
+        lastUpdatedTime,
+        mostRecentNonLocalMessage,
+      });
+    }
+    return _orderBy('lastUpdatedTime')('desc')(sidebarInfos);
+  },
+);
+
+export { sidebarInfoSelector };
diff --git a/lib/selectors/thread-selectors.js b/lib/selectors/thread-selectors.js
--- a/lib/selectors/thread-selectors.js
+++ b/lib/selectors/thread-selectors.js
@@ -6,7 +6,6 @@
 import _groupBy from 'lodash/fp/groupBy.js';
 import _map from 'lodash/fp/map.js';
 import _mapValues from 'lodash/fp/mapValues.js';
-import _orderBy from 'lodash/fp/orderBy.js';
 import _some from 'lodash/fp/some.js';
 import _sortBy from 'lodash/fp/sortBy.js';
 import _memoize from 'lodash/memoize.js';
@@ -25,13 +24,11 @@
   getRandomDefaultEmojiAvatar,
 } from '../shared/avatar-utils.js';
 import { createEntryInfo } from '../shared/entry-utils.js';
-import { getMostRecentNonLocalMessageID } from '../shared/message-utils.js';
 import {
   threadInHomeChatList,
   threadInBackgroundChatList,
   threadInFilterList,
   threadInfoFromRawThreadInfo,
-  threadInChatList,
   threadHasAdminRole,
   roleIsAdminRole,
   threadIsPending,
@@ -39,7 +36,7 @@
 } from '../shared/thread-utils.js';
 import type { ClientAvatar, ClientEmojiAvatar } from '../types/avatar-types';
 import type { EntryInfo } from '../types/entry-types.js';
-import type { MessageStore, RawMessageInfo } from '../types/message-types.js';
+import type { MessageStore } from '../types/message-types.js';
 import type {
   RelativeMemberInfo,
   ThreadInfo,
@@ -52,7 +49,6 @@
   type ThreadType,
 } from '../types/thread-types-enum.js';
 import type {
-  SidebarInfo,
   MixedRawThreadInfos,
   RawThreadInfos,
 } from '../types/thread-types.js';
@@ -221,54 +217,6 @@
   },
 );
 
-function getMostRecentRawMessageInfo(
-  threadInfo: ThreadInfo,
-  messageStore: MessageStore,
-): ?RawMessageInfo {
-  const thread = messageStore.threads[threadInfo.id];
-  if (!thread) {
-    return null;
-  }
-  for (const messageID of thread.messageIDs) {
-    return messageStore.messages[messageID];
-  }
-  return null;
-}
-
-const sidebarInfoSelector: (state: BaseAppState<>) => {
-  +[id: string]: $ReadOnlyArray<SidebarInfo>,
-} = createObjectSelector(
-  childThreadInfos,
-  (state: BaseAppState<>) => state.messageStore,
-  (childThreads: $ReadOnlyArray<ThreadInfo>, messageStore: MessageStore) => {
-    const sidebarInfos = [];
-    for (const childThreadInfo of childThreads) {
-      if (
-        !threadInChatList(childThreadInfo) ||
-        childThreadInfo.type !== threadTypes.SIDEBAR
-      ) {
-        continue;
-      }
-      const mostRecentRawMessageInfo = getMostRecentRawMessageInfo(
-        childThreadInfo,
-        messageStore,
-      );
-      const lastUpdatedTime =
-        mostRecentRawMessageInfo?.time ?? childThreadInfo.creationTime;
-      const mostRecentNonLocalMessage = getMostRecentNonLocalMessageID(
-        childThreadInfo.id,
-        messageStore,
-      );
-      sidebarInfos.push({
-        threadInfo: childThreadInfo,
-        lastUpdatedTime,
-        mostRecentNonLocalMessage,
-      });
-    }
-    return _orderBy('lastUpdatedTime')('desc')(sidebarInfos);
-  },
-);
-
 const unreadCount: (state: BaseAppState<>) => number = createSelector(
   (state: BaseAppState<>) => state.threadStore.threadInfos,
   (threadInfos: RawThreadInfos): number =>
@@ -567,7 +515,6 @@
   otherUsersButNoOtherAdmins,
   mostRecentlyReadThread,
   mostRecentlyReadThreadSelector,
-  sidebarInfoSelector,
   threadInfoFromSourceMessageIDSelector,
   pendingToRealizedThreadIDsSelector,
   savedEmojiAvatarSelectorForThread,
diff --git a/web/selectors/chat-selectors.js b/web/selectors/chat-selectors.js
--- a/web/selectors/chat-selectors.js
+++ b/web/selectors/chat-selectors.js
@@ -8,10 +8,8 @@
   createChatThreadItem,
   messageInfoSelector,
 } from 'lib/selectors/chat-selectors.js';
-import {
-  sidebarInfoSelector,
-  threadInfoSelector,
-} from 'lib/selectors/thread-selectors.js';
+import { sidebarInfoSelector } from 'lib/selectors/sidebar-selectors.js';
+import { threadInfoSelector } from 'lib/selectors/thread-selectors.js';
 import { threadIsPending } from 'lib/shared/thread-utils.js';
 import type { MessageInfo, MessageStore } from 'lib/types/message-types.js';
 import type { ThreadInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';