diff --git a/src/types/onyx/ReportAction.ts b/src/types/onyx/ReportAction.ts
index 3ec98fd43178..1b420c7dda54 100644
--- a/src/types/onyx/ReportAction.ts
+++ b/src/types/onyx/ReportAction.ts
@@ -10,7 +10,7 @@ import type {Receipt} from './Transaction';
 
 type Message = {
     /** The type of the action item fragment. Used to render a corresponding component */
-    type: string;
+    type?: string;
 
     /** The text content of the fragment. */
     text: string;
diff --git a/tests/unit/isReportMessageAttachmentTest.js b/tests/unit/isReportMessageAttachmentTest.ts
similarity index 87%
rename from tests/unit/isReportMessageAttachmentTest.js
rename to tests/unit/isReportMessageAttachmentTest.ts
index 8338513a7e7e..3014111d5c2c 100644
--- a/tests/unit/isReportMessageAttachmentTest.js
+++ b/tests/unit/isReportMessageAttachmentTest.ts
@@ -1,8 +1,9 @@
+import type {Message} from '@src/types/onyx/ReportAction';
 import isReportMessageAttachment from '../../src/libs/isReportMessageAttachment';
 
 describe('isReportMessageAttachment', () => {
     it('returns true if a report action is attachment', () => {
-        const message = {
+        const message: Message = {
             text: '[Attachment]',
             html: '<img src="https://www.expensify.com/chat-attachments/1260926113061804740/w_66791ca35b3c34c2a0eda4d065d97c9907cadd61.jpg.1024.jpg" data-expensify-source="https://www.expensify.com/chat-attachments/1260926113061804740/w_66791ca35b3c34c2a0eda4d065d97c9907cadd61.jpg" data-name="rn_image_picker_lib_temp_636b71a8-18fd-41a1-9725-6587ffb207a7.jpg" data-expensify-width="4000" data-expensify-height="3000" />',
         };
@@ -10,7 +11,7 @@ describe('isReportMessageAttachment', () => {
     });
 
     it('returns false if a report action is not attachment', () => {
-        let message = {text: '[Attachment]', html: '<em>[Attachment]</em>'};
+        let message: Message = {text: '[Attachment]', html: '<em>[Attachment]</em>'};
         expect(isReportMessageAttachment(message)).toBe(false);
 
         message = {text: '[Attachment]', html: '<a href="https://www.google.com" target="_blank" rel="noreferrer noopener">[Attachment]</a>'};