diff --git a/.travis.yml b/.travis.yml
index 1331ca5..250650f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,3 +10,4 @@ install:
 # command to run the dependencies
 script:
   - "pytest"
+  - "black responder tests setup.py --check"
diff --git a/responder/api.py b/responder/api.py
index e21a0bf..ac34de2 100644
--- a/responder/api.py
+++ b/responder/api.py
@@ -251,9 +251,7 @@ class API:
                 cont = True
         except Exception:
             self.background(
-                self.default_response,
-                websocket=route.uses_websocket,
-                error=True
+                self.default_response, websocket=route.uses_websocket, error=True
             )
             raise
 
@@ -658,6 +656,6 @@ class API:
         spawn()
 
     def run(self, **kwargs):
-        if 'debug' not in kwargs:
-            kwargs.update({'debug': self.debug})
+        if "debug" not in kwargs:
+            kwargs.update({"debug": self.debug})
         self.serve(**kwargs)
diff --git a/responder/cli.py b/responder/cli.py
index bb4cdbe..8c5548b 100644
--- a/responder/cli.py
+++ b/responder/cli.py
@@ -40,4 +40,4 @@ def cli():
             prop = "api"
 
         app = __import__(module)
-        getattr(app, prop).run()
\ No newline at end of file
+        getattr(app, prop).run()
diff --git a/responder/routes.py b/responder/routes.py
index eb77071..490c2f5 100644
--- a/responder/routes.py
+++ b/responder/routes.py
@@ -55,7 +55,7 @@ class Route:
     def _weight(self):
         params = set(self._param_pattern.findall(self.route))
         params_count = len(params)
-        w = len(self.route.rsplit('}', 1)[-1].strip('/'))
+        w = len(self.route.rsplit("}", 1)[-1].strip("/"))
         return params_count != 0, w == 0, -params_count
 
     @property
diff --git a/responder/statics.py b/responder/statics.py
index ff5c461..c10acfa 100644
--- a/responder/statics.py
+++ b/responder/statics.py
@@ -4,11 +4,11 @@ DEFAULT_SESSION_COOKIE = "Responder-Session"
 DEFAULT_SECRET_KEY = "NOTASECRET"
 
 DEFAULT_CORS_PARAMS = {
-	"allow_origins": (),
-	"allow_methods": ("GET",),
-	"allow_headers": (),
-	"allow_credentials": False,
-	"allow_origin_regex": None,
-	"expose_headers": (),
-	"max_age": 600,
+    "allow_origins": (),
+    "allow_methods": ("GET",),
+    "allow_headers": (),
+    "allow_credentials": False,
+    "allow_origin_regex": None,
+    "expose_headers": (),
+    "max_age": 600,
 }
diff --git a/tests/conftest.py b/tests/conftest.py
index c7aabf9..547a388 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -18,10 +18,7 @@ def current_dir():
 
 @pytest.fixture
 def api():
-    return responder.API(
-        debug=False,
-        allowed_hosts=[";"]
-    )
+    return responder.API(debug=False, allowed_hosts=[";"])
 
 
 @pytest.fixture
@@ -49,6 +46,7 @@ def flask():
 
     return app
 
+
 @pytest.fixture
 def schema():
     class Query(graphene.ObjectType):
diff --git a/tests/test_responder.py b/tests/test_responder.py
index 46c4e4e..2c479f7 100644
--- a/tests/test_responder.py
+++ b/tests/test_responder.py
@@ -479,8 +479,9 @@ def test_500(api):
     def view(req, resp):
         raise ValueError
 
-    dumb_client = responder.api.TestClient(api, base_url="http://;",
-                                           raise_server_exceptions=False)
+    dumb_client = responder.api.TestClient(
+        api, base_url="http://;", raise_server_exceptions=False
+    )
     r = dumb_client.get(api.url_for(view))
     assert not r.ok
     assert r.status_code == responder.status_codes.HTTP_500
diff --git a/tests/test_routes.py b/tests/test_routes.py
index e1b79f4..02230d1 100644
--- a/tests/test_routes.py
+++ b/tests/test_routes.py
@@ -89,25 +89,41 @@ def test_does_match_with_route(route, match, expected):
     [
         pytest.param("/{greetings}", (True, True, -1), id="with one param"),
         pytest.param(
-            "/{greetings}.{name}", (True, True, -2), id="with 2 params and dot in the middle"
+            "/{greetings}.{name}",
+            (True, True, -2),
+            id="with 2 params and dot in the middle",
         ),
-        pytest.param("/{greetings}/{name}", (True, True, -2), id="with 2 params and subpath"),
         pytest.param(
-            "/{greetings}/{name}/{hello}", (True, True, -3), id="with 3 params and subpath"
+            "/{greetings}/{name}", (True, True, -2), id="with 2 params and subpath"
+        ),
+        pytest.param(
+            "/{greetings}/{name}/{hello}",
+            (True, True, -3),
+            id="with 3 params and subpath",
         ),
         pytest.param(
             "/{greetings}_{name}", (True, True, -2), id="with 2 params and underscore"
         ),
         pytest.param("/{greetings}/test", (True, False, -1), id="with one param"),
         pytest.param(
-            "/{greetings}.{name}/test", (True, False, -2), id="with 2 params and dot in the middle"
-        ),
-        pytest.param("/{greetings}/{name}/test", (True, False, -2), id="with 2 params and subpath"),
-        pytest.param(
-            "/{greetings}/{name}/{hello}/test", (True, False, -3), id="with 3 params and subpath"
+            "/{greetings}.{name}/test",
+            (True, False, -2),
+            id="with 2 params and dot in the middle",
         ),
         pytest.param(
-            "/{greetings}_{name}/test", (True, False, -2), id="with 2 params and underscore"
+            "/{greetings}/{name}/test",
+            (True, False, -2),
+            id="with 2 params and subpath",
+        ),
+        pytest.param(
+            "/{greetings}/{name}/{hello}/test",
+            (True, False, -3),
+            id="with 3 params and subpath",
+        ),
+        pytest.param(
+            "/{greetings}_{name}/test",
+            (True, False, -2),
+            id="with 2 params and underscore",
         ),
         pytest.param("/hello", (False, False, 0), id="without params"),
     ],