diff --git a/app/notifications/sns_cert_validator.py b/app/notifications/sns_cert_validator.py
index de5c353e5..0ea874015 100644
--- a/app/notifications/sns_cert_validator.py
+++ b/app/notifications/sns_cert_validator.py
@@ -2,15 +2,16 @@ import base64
 import re
 from urllib.parse import urlparse
 
-#import oscrypto.asymmetric
-#import oscrypto.errors
-from cryptography import x509
-from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.asymmetric import padding
-from cryptography.exceptions import InvalidSignature
 import requests
 import six
 
+# import oscrypto.asymmetric
+# import oscrypto.errors
+from cryptography import x509
+from cryptography.exceptions import InvalidSignature
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import padding
+
 from app import redis_store
 from app.config import Config
 
@@ -122,18 +123,15 @@ def validate_sns_cert(sns_payload):
     try:
         public_key = certificate.public_key()
         public_key.verify(
-            signature,
-            string_to_sign,
-            padding.PKCS1v15(),
-            hashes.SHA256()  # or SHA1?
+            signature, string_to_sign, padding.PKCS1v15(), hashes.SHA256()  # or SHA1?
         )
-        #oscrypto.asymmetric.rsa_pkcs1v15_verify(
+        # oscrypto.asymmetric.rsa_pkcs1v15_verify(
         #    oscrypto.asymmetric.load_certificate(certificate),
         #    signature,
         #    string_to_sign,
         #    "sha1",
-        #)
+        # )
         return True
-    #except oscrypto.errors.SignatureError:
+    # except oscrypto.errors.SignatureError:
     except InvalidSignature:
         raise ValidationError("Invalid signature")