diff --git a/docs/openapi.rst b/docs/openapi.rst
index 3669d3d..00ab528 100644
--- a/docs/openapi.rst
+++ b/docs/openapi.rst
@@ -174,6 +174,15 @@ in a few ways:
   :ref:`@swagger_auto_schema <custom-spec-swagger-auto-schema>`, to prevent ``get_serializer`` from being called on
   the view
 * :ref:`exclude your endpoint from introspection <custom-spec-excluding-endpoints>`
+* use the ``swagger_fake_view`` marker to detect requests generated by ``drf-yasg``:
+
+   .. code-block:: python
+
+     def get_serializer_class(self):
+        if getattr(self, 'swagger_fake_view', False):
+           return TodoTreeSerializer
+
+        raise NotImplementedError("must not call this")
 
 .. _SCRIPT_NAME: https://www.python.org/dev/peps/pep-0333/#environ-variables
 .. _FORCE_SCRIPT_NAME: https://docs.djangoproject.com/en/2.0/ref/settings/#force-script-name
diff --git a/src/drf_yasg/generators.py b/src/drf_yasg/generators.py
index c087e10..b551eaf 100644
--- a/src/drf_yasg/generators.py
+++ b/src/drf_yasg/generators.py
@@ -243,6 +243,8 @@ class OpenAPISchemaGenerator(object):
                 view_method = getattr(view, method, None)
                 if view_method is not None:  # pragma: no cover
                     setattr(view_method.__func__, '_swagger_auto_schema', overrides)
+
+        setattr(view, 'swagger_fake_view', True)
         return view
 
     def get_endpoints(self, request):
diff --git a/testproj/todo/views.py b/testproj/todo/views.py
index a882de0..f778d70 100644
--- a/testproj/todo/views.py
+++ b/testproj/todo/views.py
@@ -33,7 +33,12 @@ class NestedTodoView(RetrieveAPIView):
 
 class TodoTreeView(viewsets.ReadOnlyModelViewSet):
     queryset = TodoTree.objects.all()
-    serializer_class = TodoTreeSerializer
+
+    def get_serializer_class(self):
+        if getattr(self, 'swagger_fake_view', False):
+            return TodoTreeSerializer
+
+        raise NotImplementedError("must not call this")
 
 
 class TodoRecursiveView(viewsets.ModelViewSet):