diff --git a/aries_cloudagent/protocols/connections/v1_0/routes.py b/aries_cloudagent/protocols/connections/v1_0/routes.py
index ac16fa67d3..b35a6b9067 100644
--- a/aries_cloudagent/protocols/connections/v1_0/routes.py
+++ b/aries_cloudagent/protocols/connections/v1_0/routes.py
@@ -187,7 +187,8 @@ class ConnectionsListQueryStringSchema(OpenAPISchema):
     )
     their_did = fields.Str(description="Their DID", required=False, **INDY_DID)
     their_public_did = fields.Str(
-        description="Their Public DID", required=False, **INDY_DID)
+        description="Their Public DID", required=False, **INDY_DID
+    )
     their_role = fields.Str(
         description="Their role in the connection protocol",
         required=False,
@@ -334,7 +335,7 @@ async def connections_list(request: web.BaseRequest):
         "their_did",
         "request_id",
         "invitation_key",
-        "their_public_did"
+        "their_public_did",
     ):
         if param_name in request.query and request.query[param_name] != "":
             tag_filter[param_name] = request.query[param_name]
diff --git a/aries_cloudagent/protocols/connections/v1_0/tests/test_routes.py b/aries_cloudagent/protocols/connections/v1_0/tests/test_routes.py
index dd5f0d26bb..b769191c25 100644
--- a/aries_cloudagent/protocols/connections/v1_0/tests/test_routes.py
+++ b/aries_cloudagent/protocols/connections/v1_0/tests/test_routes.py
@@ -32,7 +32,7 @@ async def test_connections_list(self):
             "their_role": ConnRecord.Role.REQUESTER.rfc160,
             "connection_protocol": ConnRecord.Protocol.RFC_0160.aries_protocol,
             "invitation_key": "some-invitation-key",
-            "their_public_did": "a_public_did"
+            "their_public_did": "a_public_did",
         }
 
         STATE_COMPLETED = ConnRecord.State.COMPLETED
@@ -90,7 +90,11 @@ async def test_connections_list(self):
                 await test_module.connections_list(self.request)
                 mock_conn_rec.query.assert_called_once_with(
                     ANY,
-                    {"invitation_id": "dummy", "invitation_key": "some-invitation-key", "their_public_did": "a_public_did"},
+                    {
+                        "invitation_id": "dummy",
+                        "invitation_key": "some-invitation-key",
+                        "their_public_did": "a_public_did",
+                    },
                     post_filter_positive={
                         "their_role": [v for v in ConnRecord.Role.REQUESTER.value],
                         "connection_protocol": ConnRecord.Protocol.RFC_0160.aries_protocol,