diff --git a/assets/js/src/form_editor/store/index.jsx b/assets/js/src/form_editor/store/index.jsx
index 6216dd69f2..ca7c9cba31 100644
--- a/assets/js/src/form_editor/store/index.jsx
+++ b/assets/js/src/form_editor/store/index.jsx
@@ -1,10 +1,14 @@
 import { registerStore } from '@wordpress/data';
 import actions from './actions.jsx';
-import reducer from './reducer.jsx';
+import createReducer from './reducer.jsx';
 import selectors from './selectors.jsx';
 
+const defaultState = {
+  sidebarOpened: true,
+};
+
 const config = {
-  reducer,
+  reducer: createReducer(defaultState),
   actions,
   selectors,
   controls: {},
diff --git a/assets/js/src/form_editor/store/reducer.jsx b/assets/js/src/form_editor/store/reducer.jsx
index c3507f211a..5473ef42f3 100644
--- a/assets/js/src/form_editor/store/reducer.jsx
+++ b/assets/js/src/form_editor/store/reducer.jsx
@@ -1,8 +1,4 @@
-const DEFAULT_STATE = {
-  sidebarOpened: true,
-};
-
-export default (state = DEFAULT_STATE, action) => {
+export default (defaultState) => (state = defaultState, action) => {
   switch (action.type) {
     case 'TOGGLE_SIDEBAR':
       return {