diff --git a/src/course-unit/CourseUnit.test.jsx b/src/course-unit/CourseUnit.test.jsx
index 7ffdd93d72..419bd46987 100644
--- a/src/course-unit/CourseUnit.test.jsx
+++ b/src/course-unit/CourseUnit.test.jsx
@@ -468,6 +468,10 @@ describe('<CourseUnit />', () => {
       id: courseVerticalChildrenMock.children[0].block_id,
     });
 
+    axiosMock
+      .onGet(getCourseUnitApiUrl(blockId))
+      .reply(200, courseUnitIndexMock);
+
     axiosMock
       .onPost(postXBlockBaseApiUrl({
         parent_locator: blockId,
@@ -2174,6 +2178,17 @@ describe('<CourseUnit />', () => {
         ? { ...child, block_type: 'html' }
         : child));
 
+    axiosMock
+      .onGet(getCourseUnitApiUrl(blockId))
+      .reply(200, courseUnitIndexMock);
+
+    axiosMock
+      .onPost(postXBlockBaseApiUrl({
+        parent_locator: blockId,
+        duplicate_source_locator: courseVerticalChildrenMock.children[0].block_id,
+      }))
+      .replyOnce(200, { locator: '1234567890' });
+
     axiosMock
       .onGet(getCourseVerticalChildrenApiUrl(blockId))
       .reply(200, updatedCourseVerticalChildrenMock);
diff --git a/src/course-unit/data/thunk.js b/src/course-unit/data/thunk.js
index a0c1dc54ec..ee2c4da655 100644
--- a/src/course-unit/data/thunk.js
+++ b/src/course-unit/data/thunk.js
@@ -262,6 +262,8 @@ export function duplicateUnitItemQuery(itemId, xblockId, callback) {
       callback(courseKey, locator);
       const courseUnit = await getCourseUnitData(itemId);
       dispatch(fetchCourseItemSuccess(courseUnit));
+      const courseVerticalChildrenData = await getCourseVerticalChildren(itemId);
+      dispatch(updateCourseVerticalChildren(courseVerticalChildrenData));
       dispatch(hideProcessingNotification());
       dispatch(updateSavingStatus({ status: RequestStatus.SUCCESSFUL }));
     } catch (error) {