diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..c914cb3
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,18 @@
+language: python
+os:
+- linux
+python:
+- 3.6
+- 3.7
+- 3.8-dev
+- pypy3
+cache:
+  directories:
+  - $HOME/.cache/pip
+install:
+- pip install -e .[test]
+- pip install pytest-cov codecov
+script:
+- python -m pytest --cov-branch --cov=aiohttp_graphql --cov-report=term-missing
+after_success:
+- codecov
diff --git a/README.md b/README.md
index a6f2a3b..6e6ddca 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@ Adds [GraphQL] support to your [aiohttp] application.
 
 Based on [flask-graphql] by [Syrus Akbary] and [sanic-graphql] by [Sergey Porivaev].
 
+[![TravisCI Build Status](https://github.com/graphql-python/aiohttp-graphql.svg?branch=master)](https://github.com/graphql-python/aiohttp-graphql)
+[![codecov](https://github.com/graphql-python/aiohttp-graphql/branch/master/graph/badge.svg)](https://github.com/graphql-python/aiohttp-graphql)
+
 ## Usage
 Just use the `GraphQLView` view from `aiohttp_graphql`
 
diff --git a/aiohttp_graphql/graphqlview.py b/aiohttp_graphql/graphqlview.py
index 362d87e..bc1ae56 100644
--- a/aiohttp_graphql/graphqlview.py
+++ b/aiohttp_graphql/graphqlview.py
@@ -164,12 +164,6 @@ async def __call__(self, request):
             )
 
         except HttpQueryError as err:
-            if err.headers and 'Allow' in err.headers:
-                # bug in graphql_server.execute_graphql_request
-                # https://github.com/graphql-python/graphql-server-core/pull/4
-                if isinstance(err.headers['Allow'], list):
-                    err.headers['Allow'] = ', '.join(err.headers['Allow'])
-
             return web.Response(
                 text=self.encoder({
                     'errors': [self.error_formatter(err)]
@@ -202,4 +196,15 @@ def process_preflight(self, request):
     def attach(cls, app, *, route_path='/graphql', route_name='graphql',
                **kwargs):
         view = cls(**kwargs)
-        app.router.add_route('*', route_path, view, name=route_name)
+        app.router.add_route('*', route_path, _asyncify(view), name=route_name)
+
+
+def _asyncify(handler):
+    """
+    This is mainly here because ``aiohttp`` can't infer the async definition of
+    :py:meth:`.GraphQLView.__call__` and raises a :py:class:`DeprecationWarning`
+    in tests. Wrapping it into an async function avoids the noisy warning.
+    """
+    async def _dispatch(request):
+        return await handler(request)
+    return _dispatch
diff --git a/setup.cfg b/setup.cfg
index 493cbdb..b0f0078 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,3 +10,5 @@ norecursedirs =
   .git
   .tox
 testpaths = tests/
+filterwarnings =
+  ignore:(context|root)_value has been deprecated.*:DeprecationWarning:graphql.backend.core:32
diff --git a/tests/conftest.py b/tests/conftest.py
index e765196..6e2b662 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -26,15 +26,15 @@ def view_kwargs():
 
 # aiohttp Fixtures
 @pytest.fixture
-def app(event_loop, executor, view_kwargs):
-    app = web.Application(loop=event_loop)
+def app(executor, view_kwargs):
+    app = web.Application()
     GraphQLView.attach(app, executor=executor, **view_kwargs)
     return app
 
 
 @pytest.fixture
 async def client(event_loop, app):
-    client = aiohttp.test_utils.TestClient(app, loop=event_loop)
+    client = aiohttp.test_utils.TestClient(aiohttp.test_utils.TestServer(app), loop=event_loop)
     await client.start_server()
     yield client
     await client.close()
diff --git a/tests/test_graphqlview.py b/tests/test_graphqlview.py
index 28beed2..c81e8b7 100644
--- a/tests/test_graphqlview.py
+++ b/tests/test_graphqlview.py
@@ -432,7 +432,7 @@ async def test_handles_field_errors_caught_by_graphql(client, url_builder):
     assert await response.json() == {
         'data': None,
         'errors': [
-            {'locations': [{'column': 2, 'line': 1}], 'message': 'Throws!'},
+            {'locations': [{'column': 2, 'line': 1}], 'message': 'Throws!', 'path': ['thrower']},
         ],
     }
 
@@ -447,8 +447,7 @@ async def test_handles_syntax_errors_caught_by_graphql(client, url_builder):
             {
                 'locations': [{'column': 1, 'line': 1}],
                 'message': (
-                    'Syntax Error GraphQL request (1:1) '
-                    'Unexpected Name "syntaxerror"\n\n1: syntaxerror\n   ^\n'
+                    'Syntax Error GraphQL (1:1) Unexpected Name "syntaxerror"\n\n1: syntaxerror\n   ^\n'
                 ),
             },
         ],
@@ -545,12 +544,18 @@ async def test_passes_request_into_request_context(client, url_builder):
 
 class TestCustomContext:
     @pytest.fixture
-    def view_kwargs(self, view_kwargs):
+    def view_kwargs(self, request, view_kwargs):
         # pylint: disable=no-self-use
         # pylint: disable=redefined-outer-name
-        view_kwargs.update(context='CUSTOM CONTEXT')
+        view_kwargs.update(context=request.param)
         return view_kwargs
 
+    @pytest.mark.parametrize(
+        'view_kwargs',
+        ['CUSTOM CONTEXT', {'CUSTOM_CONTEXT': 'test'}],
+        indirect=True,
+        ids=repr
+    )
     @pytest.mark.asyncio
     async def test_context_remapped(self, client, url_builder):
         response = await client.get(url_builder(query='{context}'))
@@ -561,6 +566,19 @@ async def test_context_remapped(self, client, url_builder):
         assert 'CUSTOM CONTEXT' not in _json['data']['context']
 
 
+    @pytest.mark.parametrize(
+        'view_kwargs', [{'request': 'test'}], indirect=True, ids=repr
+    )
+    @pytest.mark.asyncio
+    async def test_request_not_replaced(self, client, url_builder):
+        response = await client.get(url_builder(query='{context}'))
+
+        _json = await response.json()
+        assert response.status == 200
+        assert 'request' in _json['data']['context']
+        assert _json['data']['context'] == str({'request': 'test'})
+
+
 @pytest.mark.asyncio
 async def test_post_multipart_data(client, base_url):
     # pylint: disable=line-too-long