Clean up code to prevent flaky tests

client/cypress/fixtures/mocks.ts

@@ -102,6 +102,7 @@ export default {
       width: 800,
       height: 400,
       src: smallImage,
+      srcset: '',
       alt: '',
     },
     heroSource: '',
@@ -140,4 +141,8 @@ export default {
     note: null,
     contentUuid: null,
   }),
+  WagtailImageNode: () => ({
+    src: smallImage,
+    srcset: '',
+  }),
 };

client/src/components/content-blocks/assignment/SubmissionForm.vue

@@ -98,7 +98,7 @@ const spellcheckText = computed(() => {
   }
 });
 
-const emit = defineEmits(['reopen', 'saveInput', 'changeDocumentUrl']);
+const emit = defineEmits(['reopen', 'saveInput', 'changeDocumentUrl', 'spellcheck']);
 
 const reopenSubmission = () => {
   emit('reopen');