diff --git a/images/tests.py b/images/tests.py
index 587cd63..cae28b7 100644
--- a/images/tests.py
+++ b/images/tests.py
@@ -235,3 +235,68 @@ def test_image_delete_user_not_have_current_image(self):
         )
 
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+
+class ImageUpdateNotesTest(BaseImageTest):
+    """Tests the updating notes of image. """
+
+    def test_update_notes(self):
+        url = reverse('token-obtain-pair', kwargs={'version': 'v1'})
+        auth = self.client.post(url, data=json.dumps(self._user),
+                                content_type='application/json')
+        header = b'Bearer ' + json.loads(auth.content)['access'].encode()
+        url = reverse('image-notes-update', kwargs={'version': 'v1'})
+
+        data = {'image_id': self._user_image_id, 'notes': 'test'}
+        response = self.client.put(url, data=json.dumps(data), content_type='application/json',
+                                   HTTP_AUTHORIZATION=header)
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+    def test_image_update_notes_unauthorized(self):
+        """Tests if it's not possible to update notes of image when unauthorized. """
+
+        url = reverse('image-notes-update', kwargs={'version': 'v1'})
+        data = {'image_id': self._user_image_id, 'notes': 'test'}
+
+        response = self.client.put(url, data=json.dumps(data), content_type='application/json')
+
+        self.assertEqual(response.status_code, status.HTTP_401_UNAUTHORIZED)
+
+    def test_image_update_notes_no_existing_image(self):
+        """Tests if it's not possible to update notes of image when it doesn't exist. """
+
+        url = reverse('token-obtain-pair', kwargs={'version': 'v1'})
+        auth = self.client.post(url, data=json.dumps(self._user),
+                                content_type='application/json')
+        header = b'Bearer ' + json.loads(auth.content)['access'].encode()
+        url = reverse('image-notes-update', kwargs={'version': 'v1'})
+
+        data = {'image_id': 'a290bde6-1cde-45db-a5ed-4cf8273c80b5', 'notes': 'test'}
+        response = self.client.put(url, data=json.dumps(data), content_type='application/json',
+                                   HTTP_AUTHORIZATION=header)
+
+        self.assertEqual(response.content, b'{"image_id": ["Image does not exist."]}')
+
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_image_update_notes_user_not_have_current_image(self):
+        """Tests if it's not possible to update notes of image when it not belong current user.
+        """
+
+        url = reverse('token-obtain-pair', kwargs={'version': 'v1'})
+        auth = self.client.post(url, data=json.dumps(self._user),
+                                content_type='application/json')
+        header = b'Bearer ' + json.loads(auth.content)['access'].encode()
+        url = reverse('image-notes-update', kwargs={'version': 'v1'})
+
+        data = {'image_id': self._user2_image_id, 'notes': 'test'}
+        response = self.client.put(url, data=json.dumps(data), content_type='application/json',
+                                   HTTP_AUTHORIZATION=header)
+
+        self.assertEqual(
+            response.content,
+            b'{"image_id": ["Current user does not have current image."]}',
+        )
+
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)