diff --git a/lib/reducers/thread-reducer.js b/lib/reducers/thread-reducer.js
--- a/lib/reducers/thread-reducer.js
+++ b/lib/reducers/thread-reducer.js
@@ -186,9 +186,6 @@
     action.type === fullStateSyncActionType
   ) {
     const newThreadInfos = action.payload.threadInfos;
-    const updatedStore = {
-      threadInfos: newThreadInfos,
-    };
     const threadStoreOperations = [
       {
         type: 'remove_all',
@@ -198,13 +195,12 @@
         payload: { id, threadInfo: newThreadInfos[id] },
       })),
     ];
-    const processedStore = processThreadStoreOperations(
+    const updatedThreadStore = processThreadStoreOperations(
       state,
       threadStoreOperations,
     );
-    assertThreadStoreThreadsAreEqual(processedStore, updatedStore, action.type);
     return {
-      threadStore: updatedStore,
+      threadStore: updatedThreadStore,
       newThreadInconsistencies: [],
       threadStoreOperations,
     };