diff --git a/onadata/libs/serializers/submission_review_serializer.py b/onadata/libs/serializers/submission_review_serializer.py
index 5b816a28dd..e010a6abe1 100644
--- a/onadata/libs/serializers/submission_review_serializer.py
+++ b/onadata/libs/serializers/submission_review_serializer.py
@@ -7,6 +7,8 @@
 
 from onadata.apps.logger.models import SubmissionReview
 from onadata.libs.serializers.note_serializer import NoteSerializer
+from onadata.libs.utils.common_tags import (COMMENT_REQUIRED,
+                                            SUBMISSION_REVIEW_INSTANCE_FIELD)
 
 
 class SubmissionReviewSerializer(serializers.ModelSerializer):
@@ -33,10 +35,7 @@ def validate(self, attrs):
 
         if status == SubmissionReview.REJECTED:
             if note_text is None:
-                raise exceptions.ValidationError({
-                    'note':
-                    'Can\'t reject a submission without a comment.'
-                })
+                raise exceptions.ValidationError({'note': COMMENT_REQUIRED})
         return attrs
 
     def create(self, validated_data):
@@ -46,7 +45,7 @@ def create(self, validated_data):
         note_data = validated_data.pop('note')
         note_data['instance'] = validated_data.get('instance')
         note_data['created_by'] = validated_data.get('created_by')
-        note_data['instance_field'] = "_review_status"
+        note_data['instance_field'] = SUBMISSION_REVIEW_INSTANCE_FIELD
 
         note = NoteSerializer.create(
             NoteSerializer(), validated_data=note_data)
diff --git a/onadata/libs/tests/serializers/test_submission_review_serializer.py b/onadata/libs/tests/serializers/test_submission_review_serializer.py
index df43854ec8..8cade5ef32 100644
--- a/onadata/libs/tests/serializers/test_submission_review_serializer.py
+++ b/onadata/libs/tests/serializers/test_submission_review_serializer.py
@@ -10,6 +10,8 @@
 from onadata.apps.main.tests.test_base import TestBase
 from onadata.libs.serializers.submission_review_serializer import \
     SubmissionReviewSerializer
+from onadata.libs.utils.common_tags import (COMMENT_REQUIRED,
+                                            SUBMISSION_REVIEW_INSTANCE_FIELD)
 
 
 class TestSubmissionReviewSerializer(TestBase):
@@ -44,8 +46,8 @@ def _create_submission_review(self):
 
         note = submission_review.note
         self.assertEqual(instance, submission_review.instance)
-        self.assertEqual(submission_review.note_text, "Hey there")
-        self.assertEqual(note.instance_field, "_review_status")
+        self.assertEqual("Hey there", submission_review.note_text)
+        self.assertEqual(SUBMISSION_REVIEW_INSTANCE_FIELD, note.instance_field)
         self.assertEqual(note.instance, submission_review.instance)
 
         return serializer_instance.data
@@ -66,8 +68,7 @@ def test_validate_bad_data(self):
             SubmissionReviewSerializer().validate(data)
 
         no_comment_error_detail = no_comment.exception.detail['note']
-        self.assertEqual(no_comment_error_detail,
-                         'Can\'t reject a submission without a comment.')
+        self.assertEqual(COMMENT_REQUIRED, no_comment_error_detail)
 
     def test_submission_review_create(self):
         """
@@ -104,4 +105,4 @@ def test_submission_review_update(self):
 
         # Doesnt create a new note
         self.assertEqual(len(Note.objects.all()), 1)
-        self.assertNotEqual(new_review.note_text, old_note_text)
+        self.assertNotEqual(old_note_text, new_review.note_text)
diff --git a/onadata/libs/utils/common_tags.py b/onadata/libs/utils/common_tags.py
index 5604d5866f..65b4599dc3 100644
--- a/onadata/libs/utils/common_tags.py
+++ b/onadata/libs/utils/common_tags.py
@@ -119,3 +119,7 @@
     'kml': 'vnd.google-earth.kml+xml',
     OSM: OSM
 }
+
+# Submission Review Tags
+COMMENT_REQUIRED = 'Can\'t reject a submission without a comment.'
+SUBMISSION_REVIEW_INSTANCE_FIELD = '_review_status'