diff --git a/lib/reducers/user-reducer.js b/lib/reducers/user-reducer.js
--- a/lib/reducers/user-reducer.js
+++ b/lib/reducers/user-reducer.js
@@ -19,6 +19,7 @@
 } from '../actions/user-actions.js';
 import {
   convertUserInfosToReplaceUserOps,
+  type UserStoreOperation,
   userStoreOpsHandlers,
 } from '../ops/user-store-ops.js';
 import { stateSyncSpecs } from '../shared/state-sync/state-sync-specs.js';
@@ -271,18 +272,35 @@
       return [state, []];
     }
 
+    const userStoreOps: UserStoreOperation[] = [];
     const newUserInfos = { ...state.userInfos };
     if (userInfos) {
       for (const userInfo of userInfos) {
         newUserInfos[userInfo.id] = userInfo;
+        userStoreOps.push({ type: 'replace_user', payload: { ...userInfo } });
       }
     }
     if (deleteUserInfoIDs) {
       for (const deleteUserInfoID of deleteUserInfoIDs) {
         delete newUserInfos[deleteUserInfoID];
       }
+      userStoreOps.push({
+        type: 'remove_users',
+        payload: { ids: deleteUserInfoIDs },
+      });
     }
 
+    const processedUserInfos: UserInfos = processUserStoreOps(
+      state.userInfos,
+      userStoreOps,
+    );
+    assertUserStoresAreEqual(
+      processedUserInfos,
+      newUserInfos,
+      action.type,
+      onStateDifference,
+    );
+
     const newInconsistencies = stateSyncSpecs.users.findStoreInconsistencies(
       action,
       state.userInfos,