diff --git a/swh/core/api/tests/test_rpc_client_server.py b/swh/core/api/tests/test_rpc_client_server.py
index f1a15ea..e0b9d46 100644
--- a/swh/core/api/tests/test_rpc_client_server.py
+++ b/swh/core/api/tests/test_rpc_client_server.py
@@ -1,89 +1,89 @@
 # Copyright (C) 2018-2019  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import pytest
 
 from swh.core.api import remote_api_endpoint, RPCServerApp, RPCClient
 from swh.core.api import error_handler, encode_data_server
 
 
 # this class is used on the server part
 class RPCTest:
     @remote_api_endpoint('endpoint_url')
     def endpoint(self, test_data, db=None, cur=None):
         assert test_data == 'spam'
         return 'egg'
 
     @remote_api_endpoint('path/to/endpoint')
     def something(self, data, db=None, cur=None):
         return data
 
 
 # this class is used on the client part. We cannot inherit from RPCTest
 # because the automagic metaclass based code that generates the RPCClient
 # proxy class from this does not handle inheritance properly.
 # We do add an endpoint on the client side that has no implementation
 # server-side to test this very situation (in should generate a 404)
 class RPCTest2:
     @remote_api_endpoint('endpoint_url')
     def endpoint(self, test_data, db=None, cur=None):
         assert test_data == 'spam'
         return 'egg'
 
     @remote_api_endpoint('path/to/endpoint')
     def something(self, data, db=None, cur=None):
         return data
 
     @remote_api_endpoint('not_on_server')
     def not_on_server(self, db=None, cur=None):
         return 'ok'
 
 
 class RPCTestClient(RPCClient):
     backend_class = RPCTest2
 
 
 @pytest.fixture
 def app():
     # This fixture is used by the 'swh_rpc_adapter' fixture
     # which is defined in swh/core/pytest_plugin.py
     application = RPCServerApp('testapp', backend_class=RPCTest)
     @application.errorhandler(Exception)
     def my_error_handler(exception):
         return error_handler(exception, encode_data_server)
     return application
 
 
 @pytest.fixture
 def swh_rpc_client_class():
     # This fixture is used by the 'swh_rpc_client' fixture
     # which is defined in swh/core/pytest_plugin.py
     return RPCTestClient
 
 
 def test_api_client_endpoint_missing(swh_rpc_client):
     with pytest.raises(AttributeError):
         swh_rpc_client.missing(data='whatever')
 
 
 def test_api_server_endpoint_missing(swh_rpc_client):
     # A 'missing' endpoint (server-side) should raise an exception
-    # due to a 404, since at the end, we do a GET/POST an inexistant URL
+    # due to a 404, since at the end, we do a GET/POST an inexistent URL
     with pytest.raises(Exception, match='404 Not Found'):
         swh_rpc_client.not_on_server()
 
 
 def test_api_endpoint_kwargs(swh_rpc_client):
     res = swh_rpc_client.something(data='whatever')
     assert res == 'whatever'
     res = swh_rpc_client.endpoint(test_data='spam')
     assert res == 'egg'
 
 
 def test_api_endpoint_args(swh_rpc_client):
     res = swh_rpc_client.something('whatever')
     assert res == 'whatever'
     res = swh_rpc_client.endpoint('spam')
     assert res == 'egg'