diff --git a/rest_framework/templates/rest_framework/docs/document.html b/rest_framework/templates/rest_framework/docs/document.html
index ef5f5966b..274eee4e3 100644
--- a/rest_framework/templates/rest_framework/docs/document.html
+++ b/rest_framework/templates/rest_framework/docs/document.html
@@ -13,7 +13,7 @@
     {% if 'javascript' in langs %}{% include "rest_framework/docs/langs/javascript-intro.html" %}{% endif %}
 </div>
 </div>
-
+{% if document.data %}
 {% for section_key, section in document.data|items %}
 {% if section_key %}
     <h2 id="{{ section_key }}" class="coredocs-section-title">{{ section_key }} <a href="#{{ section_key }}"><i class="fa fa-link" aria-hidden="true"></i>
@@ -28,3 +28,4 @@
 {% for link_key, link in document.links|items %}
     {% include "rest_framework/docs/link.html" %}
 {% endfor %}
+{% endif %}
diff --git a/rest_framework/templates/rest_framework/docs/sidebar.html b/rest_framework/templates/rest_framework/docs/sidebar.html
index c6ac26f66..7e20e2485 100644
--- a/rest_framework/templates/rest_framework/docs/sidebar.html
+++ b/rest_framework/templates/rest_framework/docs/sidebar.html
@@ -5,16 +5,18 @@
     <i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"></i>
     <div class="menu-list">
         <ul id="menu-content" class="menu-content collapse out">
+            {% if document.data %}
             {% for section_key, section in document.data|items %}
             <li data-toggle="collapse" data-target="#{{ section_key }}-dropdown" class="collapsed">
                 <a><i class="fa fa-dot-circle-o fa-lg"></i> {% if section_key %}{{ section_key }}{% else %}API Endpoints{% endif %} <span class="arrow"></span></a>
-            </li>
-            <ul class="sub-menu {% if section_key %}collapse{% endif %}" id="{{ section_key }}-dropdown">
+                <ul class="sub-menu {% if section_key %}collapse{% endif %}" id="{{ section_key }}-dropdown">
                 {% for link_key, link in section.links|items %}
                     <li><a href="#{{ section_key }}-{{ link_key }}">{{ link.title|default:link_key }}</a></li>
                 {% endfor %}
-            </ul>
+                </ul>
+            </li>
             {% endfor %}
+            {% endif %}
         </ul>
 
         <ul class="menu-list menu-list-bottom">
diff --git a/tests/test_atomic_requests.py b/tests/test_atomic_requests.py
index 9085bfc89..f925ce3d3 100644
--- a/tests/test_atomic_requests.py
+++ b/tests/test_atomic_requests.py
@@ -45,6 +45,7 @@ class NonAtomicAPIExceptionView(APIView):
         BasicModel.objects.all()
         raise Http404
 
+
 urlpatterns = (
     url(r'^$', NonAtomicAPIExceptionView.as_view()),
 )
diff --git a/tests/test_fields.py b/tests/test_fields.py
index bb3d349b4..a73aa0c16 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -1143,7 +1143,6 @@ class TestDateTimeField(FieldValues):
     valid_inputs = {
         '2001-01-01 13:00': datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc),
         '2001-01-01T13:00': datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc),
-        '2001-01-01T13:00Z': datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc),
         datetime.datetime(2001, 1, 1, 13, 00): datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc),
         datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc): datetime.datetime(2001, 1, 1, 13, 00, tzinfo=utc),
         # Django 1.4 does not support timezone string parsing.
diff --git a/tests/test_permissions.py b/tests/test_permissions.py
index cabf66883..6fbf766a0 100644
--- a/tests/test_permissions.py
+++ b/tests/test_permissions.py
@@ -246,6 +246,7 @@ class ObjectPermissionInstanceView(generics.RetrieveUpdateDestroyAPIView):
     authentication_classes = [authentication.BasicAuthentication]
     permission_classes = [ViewObjectPermissions]
 
+
 object_permissions_view = ObjectPermissionInstanceView.as_view()
 
 
@@ -255,6 +256,7 @@ class ObjectPermissionListView(generics.ListAPIView):
     authentication_classes = [authentication.BasicAuthentication]
     permission_classes = [ViewObjectPermissions]
 
+
 object_permissions_list_view = ObjectPermissionListView.as_view()
 
 
@@ -443,6 +445,7 @@ class DeniedObjectView(PermissionInstanceView):
 class DeniedObjectViewWithDetail(PermissionInstanceView):
     permission_classes = (BasicObjectPermWithDetail,)
 
+
 denied_view = DeniedView.as_view()
 
 denied_view_with_detail = DeniedViewWithDetail.as_view()
diff --git a/tests/test_renderers.py b/tests/test_renderers.py
index 09cef435e..1625b0b70 100644
--- a/tests/test_renderers.py
+++ b/tests/test_renderers.py
@@ -108,6 +108,7 @@ class HTMLView1(APIView):
     def get(self, request, **kwargs):
         return Response('text')
 
+
 urlpatterns = [
     url(r'^.*\.(?P<format>.+)$', MockView.as_view(renderer_classes=[RendererA, RendererB])),
     url(r'^$', MockView.as_view(renderer_classes=[RendererA, RendererB])),
diff --git a/tests/test_response.py b/tests/test_response.py
index 33c51e773..e92bf54c1 100644
--- a/tests/test_response.py
+++ b/tests/test_response.py
@@ -32,6 +32,7 @@ class MockJsonRenderer(BaseRenderer):
 class MockTextMediaRenderer(BaseRenderer):
     media_type = 'text/html'
 
+
 DUMMYSTATUS = status.HTTP_200_OK
 DUMMYCONTENT = 'dummycontent'
 
diff --git a/tests/test_reverse.py b/tests/test_reverse.py
index 2ca44ab77..47eda256e 100644
--- a/tests/test_reverse.py
+++ b/tests/test_reverse.py
@@ -13,6 +13,7 @@ factory = APIRequestFactory()
 def null_view(request):
     pass
 
+
 urlpatterns = [
     url(r'^view$', null_view, name='view'),
 ]
diff --git a/tests/test_schemas.py b/tests/test_schemas.py
index 24131480f..2b8673480 100644
--- a/tests/test_schemas.py
+++ b/tests/test_schemas.py
@@ -70,6 +70,7 @@ class ExampleViewSet(ModelViewSet):
         assert self.action
         return super(ExampleViewSet, self).get_serializer(*args, **kwargs)
 
+
 if coreapi:
     schema_view = get_schema_view(title='Example API')
 else:
diff --git a/tests/test_validation.py b/tests/test_validation.py
index 8ff4aaf38..8b71693c5 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -243,6 +243,7 @@ class RegexSerializer(serializers.Serializer):
         validators=[RegexValidator(regex=re.compile('^[0-9]{4,6}$'),
                                    message='A PIN is 4-6 digits')])
 
+
 expected_repr = """
 RegexSerializer():
     pin = CharField(validators=[<django.core.validators.RegexValidator object>])