1 files changed, 11 insertions, 0 deletions
diff --git a/spec/frontend/repository/components/blob_content_viewer_spec.js b/spec/frontend/repository/components/blob_content_viewer_spec.js
index d498b6f0c4f..2b70cb84c67 100644
--- a/spec/frontend/repository/components/blob_content_viewer_spec.js
+++ b/spec/frontend/repository/components/blob_content_viewer_spec.js
@@ -136,6 +136,7 @@ describe('Blob content viewer component', () => {
   const findBlobButtonGroup = () => wrapper.findComponent(BlobButtonGroup);
   const findForkSuggestion = () => wrapper.findComponent(ForkSuggestion);
   const findCodeIntelligence = () => wrapper.findComponent(CodeIntelligence);
+  const findSourceViewer = () => wrapper.findComponent(SourceViewer);
 
   beforeEach(() => {
     jest.spyOn(window, 'requestIdleCallback').mockImplementation(execImmediately);
@@ -197,6 +198,16 @@ describe('Blob content viewer component', () => {
         expect(mockAxios.history.get[0].url).toBe(legacyViewerUrl);
       });
 
+      it('loads a legacy viewer when the source viewer emits an error', async () => {
+        loadViewer.mockReturnValueOnce(SourceViewer);
+        await createComponent();
+        findSourceViewer().vm.$emit('error');
+        await waitForPromises();
+
+        expect(mockAxios.history.get).toHaveLength(1);
+        expect(mockAxios.history.get[0].url).toBe(legacyViewerUrl);
+      });
+
       it('loads a legacy viewer when a viewer component is not available', async () => {
         await createComponent({ blob: { ...simpleViewerMock, fileType: 'unknown' } });