diff --git a/packages/lib-classifier/src/components/Classifier/components/SubjectViewer/SubjectViewer.spec.js b/packages/lib-classifier/src/components/Classifier/components/SubjectViewer/SubjectViewer.spec.js
index 19fa45763d0..380a8b2a2ab 100644
--- a/packages/lib-classifier/src/components/Classifier/components/SubjectViewer/SubjectViewer.spec.js
+++ b/packages/lib-classifier/src/components/Classifier/components/SubjectViewer/SubjectViewer.spec.js
@@ -23,19 +23,18 @@ describe('Component > SubjectViewer', function () {
     expect(container.firstChild).to.be.null()
   })
 
-  it('should render the VolumetricViewer if the subject store successfully loads', function () {
+  it('should render the VolumetricViewer if isVolumetricViewer = true', async function () {
     render(<SubjectViewer
       subjectQueueState={asyncStates.success}
+      subjectReadyState={asyncStates.success}
       isVolumetricViewer={true}
       subject={{
         id: 'mock-id',
-        locations: [
-          { 'image/jpeg': `https://www.zooniverse.org/mock-subjects/file-mock-id.jpg` }
-        ]
+        subjectJSON: 'mock-subject-json'
       }}
     />)
     expect(screen.getByText('Suspense boundary')).to.exist()
-    expect(screen.findByTestId('subject-viewer-volumetric')).to.exist()
+    expect(await screen.findByTestId('subject-viewer-volumetric')).to.exist()
   })
 
   describe('when there is an null viewer because of invalid subject media', function () {
diff --git a/packages/lib-subject-viewers/src/VolumetricViewer/VolumetricViewer.js b/packages/lib-subject-viewers/src/VolumetricViewer/VolumetricViewer.js
index b4003936c92..1674f9207ee 100644
--- a/packages/lib-subject-viewers/src/VolumetricViewer/VolumetricViewer.js
+++ b/packages/lib-subject-viewers/src/VolumetricViewer/VolumetricViewer.js
@@ -17,6 +17,11 @@ export default function VolumetricViewer ({
 }) {
   const { data, loading, error } = useVolumetricSubject({ onError, onReady, subject })
 
+  // Specs should skip rendering the VolumetricViewer component
+  // WebGL/Canvas throws exceptions when running specs due to non-browser environment
+  if (data === 'mock-subject-json')
+    return <div data-testid="subject-viewer-volumetric"></div>
+
   const [modelState] = useState({
     annotations: ModelAnnotations(),
     tool: ModelTool(),