diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 514bb37da..30523995a 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -50,7 +50,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
@@ -86,7 +86,7 @@ class MsisdnPasswordRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
@@ -230,7 +230,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
@@ -273,7 +273,7 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.datastore.get_user_id_by_threepid(
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index c3479e29d..bf68e34a5 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -73,7 +73,7 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "email", body['email']):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
@@ -113,7 +113,7 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
 
         if not check_3pid_allowed(self.hs, "msisdn", msisdn):
             raise SynapseError(
-                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
             )
 
         existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
@@ -377,7 +377,7 @@ class RegisterRestServlet(RestServlet):
 
             if not check_3pid_allowed(self.hs, medium, address):
                 raise SynapseError(
-                    403, "Third party identifier is not allowed", Codes.THREEPID_DENIED
+                    403, "Third party identifier is not allowed", Codes.THREEPID_DENIED,
                 )
 
         if registered_user_id is not None: