diff --git a/endpoints/notificationevent.py b/endpoints/notificationevent.py
index 925247809..f1bf0a09d 100644
--- a/endpoints/notificationevent.py
+++ b/endpoints/notificationevent.py
@@ -122,10 +122,14 @@ class VulnerabilityFoundEvent(NotificationEvent):
 
   def should_perform(self, event_data, notification_data):
     event_config = json.loads(notification_data.event_config_json)
-    expected_level_index = event_config['level']
-    priority = PRIORITY_LEVELS[event_data['vulnerability']['priority']]
-    actual_level_index = priority['index']
-    return actual_level_index <= expected_level_index
+    filter_level_index = int(event_config['level'])
+
+    event_severity = PRIORITY_LEVELS.get(event_data['vulnerability']['priority'])
+    if event_severity is None:
+      return False
+
+    actual_level_index = int(event_severity['index'])
+    return actual_level_index <= filter_level_index
 
   def get_summary(self, event_data, notification_data):
     msg = '%s vulnerability detected in repository %s in tags %s'
diff --git a/test/test_secscan.py b/test/test_secscan.py
index 4d98fae86..78c3c9ca3 100644
--- a/test/test_secscan.py
+++ b/test/test_secscan.py
@@ -4,6 +4,7 @@ import os
 from httmock import urlmatch, all_requests, HTTMock
 
 from app import app, config_provider, storage, notification_queue
+from endpoints.notificationevent import VulnerabilityFoundEvent
 from initdb import setup_database_for_testing, finished_database_for_testing
 from util.secscan.api import SecurityScannerAPI, AnalyzeLayerException
 from util.secscan.analyzer import LayerAnalyzer
@@ -405,7 +406,7 @@ class TestSecurityScanner(unittest.TestCase):
 
     # Add a repo event for the layer.
     repo = model.repository.get_repository(ADMIN_ACCESS_USER, SIMPLE_REPO)
-    model.notification.create_repo_notification(repo, 'vulnerability_found', 'quay_notification', {}, {'level': 100})
+    notification = model.notification.create_repo_notification(repo, 'vulnerability_found', 'quay_notification', {}, {'level': 100})
 
     @urlmatch(netloc=r'(.*\.)?mockclairservice', path=r'/v1/layers/(.+)')
     def get_matching_layer_vulnerable(url, request):
@@ -436,7 +437,7 @@ class TestSecurityScanner(unittest.TestCase):
 
     # Fire off the notification processing.
     with HTTMock(get_matching_layer_vulnerable, response_content):
-      notification_data = self._get_notification_data([layer_id], [layer_id], new_severity='High')
+      notification_data = self._get_notification_data([layer_id], [layer_id], new_severity='Critical')
       self.assertTrue(process_notification_data(notification_data))
 
     # Ensure an event was written for the tag.
@@ -446,9 +447,20 @@ class TestSecurityScanner(unittest.TestCase):
     body = json.loads(queue_item.body)
     self.assertEquals(['prod', 'latest'], body['event_data']['tags'])
     self.assertEquals('CVE-TEST', body['event_data']['vulnerability']['id'])
-    self.assertEquals('High', body['event_data']['vulnerability']['priority'])
+    self.assertEquals('Critical', body['event_data']['vulnerability']['priority'])
     self.assertTrue(body['event_data']['vulnerability']['has_fix'])
 
+    # Verify that an event would be raised.
+    event_data = body['event_data']
+    self.assertTrue(VulnerabilityFoundEvent().should_perform(event_data, notification))
+
+    # Create another notification with a matching level and verify it will be raised.
+    notification = model.notification.create_repo_notification(repo, 'vulnerability_found', 'quay_notification', {}, {'level': 1})
+    self.assertTrue(VulnerabilityFoundEvent().should_perform(event_data, notification))
+
+    # Create another notification with a higher level and verify it won't be raised.
+    notification = model.notification.create_repo_notification(repo, 'vulnerability_found', 'quay_notification', {}, {'level': 0})
+    self.assertFalse(VulnerabilityFoundEvent().should_perform(event_data, notification))
 
 if __name__ == '__main__':
   unittest.main()
\ No newline at end of file