diff --git a/rest_framework/generics.py b/rest_framework/generics.py
index 88438e8c4..dc45bda01 100644
--- a/rest_framework/generics.py
+++ b/rest_framework/generics.py
@@ -229,8 +229,9 @@ class UpdateAPIView(mixins.UpdateModelMixin,
     def put(self, request, *args, **kwargs):
         return self.update(request, *args, **kwargs)
 
-    def patch(self, request, *args, **kwargs):
-        return self.partial_update(request, *args, **kwargs)
+    if api_settings.SUPPORT_PATCH:
+        def patch(self, request, *args, **kwargs):
+            return self.partial_update(request, *args, **kwargs)
 
 
 class ListCreateAPIView(mixins.ListModelMixin,
@@ -258,8 +259,9 @@ class RetrieveUpdateAPIView(mixins.RetrieveModelMixin,
     def put(self, request, *args, **kwargs):
         return self.update(request, *args, **kwargs)
 
-    def patch(self, request, *args, **kwargs):
-        return self.partial_update(request, *args, **kwargs)
+    if api_settings.SUPPORT_PATCH:
+        def patch(self, request, *args, **kwargs):
+            return self.partial_update(request, *args, **kwargs)
 
 
 class RetrieveDestroyAPIView(mixins.RetrieveModelMixin,
@@ -288,8 +290,9 @@ class RetrieveUpdateDestroyAPIView(mixins.RetrieveModelMixin,
     def put(self, request, *args, **kwargs):
         return self.update(request, *args, **kwargs)
 
-    def patch(self, request, *args, **kwargs):
-        return self.partial_update(request, *args, **kwargs)
+    if api_settings.SUPPORT_PATCH:
+        def patch(self, request, *args, **kwargs):
+            return self.partial_update(request, *args, **kwargs)
 
     def delete(self, request, *args, **kwargs):
         return self.destroy(request, *args, **kwargs)
diff --git a/rest_framework/views.py b/rest_framework/views.py
index faa197e1e..a709c2f6b 100644
--- a/rest_framework/views.py
+++ b/rest_framework/views.py
@@ -129,12 +129,7 @@ class APIView(View):
         """
         Wrap Django's private `_allowed_methods` interface in a public property.
         """
-        allowed_methods = self._allowed_methods()
-
-        if not api_settings.SUPPORT_PATCH and 'PATCH' in allowed_methods:
-            allowed_methods.remove('PATCH')
-
-        return allowed_methods
+        return self._allowed_methods()
 
     @property
     def default_response_headers(self):
@@ -456,7 +451,7 @@ class APIView(View):
             self.initial(request, *args, **kwargs)
 
             # Get the appropriate handler method
-            if request.method in self.allowed_methods:
+            if request.method.lower() in self.http_method_names:
                 handler = getattr(self, request.method.lower(),
                                   self.http_method_not_allowed)
             else:
diff --git a/tests/test_generics.py b/tests/test_generics.py
index d98c86dea..083f95f60 100644
--- a/tests/test_generics.py
+++ b/tests/test_generics.py
@@ -4,10 +4,11 @@ import django
 from django.db import models
 from django.shortcuts import get_object_or_404
 from django.test import TestCase
+from django.test.utils import override_settings
 from django.utils import six
+from django.utils.six.moves import reload_module
 
 from rest_framework import generics, renderers, serializers, status
-from rest_framework.settings import api_settings
 from rest_framework.test import APIRequestFactory
 from tests.models import (
     BasicModel, ForeignKeySource, ForeignKeyTarget, RESTFrameworkModel
@@ -214,19 +215,6 @@ class TestInstanceView(TestCase):
         updated = self.objects.get(id=1)
         self.assertEqual(updated.text, 'foobar')
 
-    def test_patch_instance_view_support_patch(self):
-        """
-        PATCH requests with SUPPORT_PATCH=False should return 405
-        """
-        data = {'text': 'foobar'}
-        request = factory.patch('/1', data, format='json')
-
-        api_settings.SUPPORT_PATCH = False
-        response = self.view(request, pk=1).render()
-        api_settings.SUPPORT_PATCH = True
-
-        self.assertEqual(response.status_code, status.HTTP_405_METHOD_NOT_ALLOWED)
-
     def test_delete_instance_view(self):
         """
         DELETE requests to RetrieveUpdateDestroyAPIView should delete an object.
@@ -521,3 +509,22 @@ class TestFilterBackendAppliedToViews(TestCase):
         response = view(request).render()
         self.assertContains(response, 'field_b')
         self.assertNotContains(response, 'field_a')
+
+
+class TestSupportPatchSetting(TestCase):
+    def test_patch_instance_view_support_patch(self):
+        """
+        PATCH requests should fail when SUPPORT_PATCH is set to False.
+        """
+        with override_settings(REST_FRAMEWORK={'SUPPORT_PATCH': False}):
+            reload_module(generics)
+            data = {'text': 'foobar'}
+            request = factory.patch('/1', data, format='json')
+
+            class InstanceView(generics.UpdateAPIView):
+                queryset = BasicModel.objects.all()
+                serializer_class = BasicSerializer
+
+            view = InstanceView.as_view()
+            response = view(request, pk=1).render()
+            self.assertEqual(response.status_code, status.HTTP_405_METHOD_NOT_ALLOWED)