diff --git a/frontend/app/components/comment-form/comment-form.test.tsx b/frontend/app/components/comment-form/comment-form.test.tsx
index 77f3a1ad..31ad5489 100644
--- a/frontend/app/components/comment-form/comment-form.test.tsx
+++ b/frontend/app/components/comment-form/comment-form.test.tsx
@@ -2,7 +2,7 @@
 import { createElement } from 'preact';
 import { shallow } from 'enzyme';
 
-import { user } from '@app/testUtils/mocks/user';
+import { user, anonymousUser } from '@app/testUtils/mocks/user';
 import { StaticStore } from '@app/common/static_store';
 import { LS_SAVED_COMMENT_VALUE } from '@app/common/constants';
 import * as localStorageModule from '@app/common/local-storage';
@@ -131,4 +131,24 @@ describe('<CommentForm />', () => {
       expect(localStorage.getItem(LS_SAVED_COMMENT_VALUE)).toBe(JSON.stringify({}));
     });
   });
+
+  it('should show error message of image upload try by anonymous user', () => {
+    const props = { ...DEFAULT_PROPS, anonymousUser, intl };
+    const wrapper = shallow(<CommentForm {...props} />);
+    // @ts-ignore
+    const instance: CommentForm = wrapper.instance();
+
+    instance.onDrop(new Event('drag') as DragEvent);
+    expect(wrapper.exists('.comment-form__error')).toEqual(true);
+  });
+
+  it('should show error message of image upload try by unauthorized user', () => {
+    const props = { ...DEFAULT_PROPS, intl };
+    const wrapper = shallow(<CommentForm {...props} />);
+    // @ts-ignore
+    const instance: CommentForm = wrapper.instance();
+
+    instance.onDrop(new Event('drag') as DragEvent);
+    expect(wrapper.exists('.comment-form__error')).toEqual(true);
+  });
 });