diff --git a/graphene-django/graphene_django/debug/middleware.py b/graphene-django/graphene_django/debug/middleware.py
index 40c1c32e1..9479fd182 100644
--- a/graphene-django/graphene_django/debug/middleware.py
+++ b/graphene-django/graphene_django/debug/middleware.py
@@ -49,7 +49,6 @@ def resolve(self, next, root, args, context, info):
                 raise Exception('DjangoDebug need the context to be writable, context received: {}.'.format(
                     context.__class__.__name__
                 ))
-        print info.schema.get_type('DjangoDebug'), info.return_type
         if info.schema.get_type('DjangoDebug') == info.return_type:
             return context.django_debug.get_debug_promise()
         promise = next(root, args, context, info)
diff --git a/graphene-django/graphene_django/tests/test_form_converter.py b/graphene-django/graphene_django/tests/test_form_converter.py
index 0d00fba6e..661e73a8d 100644
--- a/graphene-django/graphene_django/tests/test_form_converter.py
+++ b/graphene-django/graphene_django/tests/test_form_converter.py
@@ -4,7 +4,6 @@
 import graphene
 from ..form_converter import convert_form_field
 from graphene import ID, List, NonNull
-from graphene.utils.get_graphql_type import get_graphql_type
 
 from .models import Reporter
 
diff --git a/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_schema.py b/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_schema.py
index 24bfb7f40..f6a90d3d1 100644
--- a/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_schema.py
+++ b/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_schema.py
@@ -28,7 +28,7 @@ class Meta:
             model = Reporter
             registry = Registry()
 
-    assert ReporterType2._meta.fields.keys() == ['id', 'first_name', 'last_name', 'email', 'pets', 'articles']
+    assert list(ReporterType2._meta.fields.keys()) == ['id', 'first_name', 'last_name', 'email', 'pets', 'articles']
 
 
 def test_should_map_only_few_fields():
@@ -37,4 +37,4 @@ class Reporter2(SQLAlchemyObjectType):
         class Meta:
             model = Reporter
             only_fields = ('id', 'email')
-    assert Reporter2._meta.fields.keys() == ['id', 'email']
+    assert list(Reporter2._meta.fields.keys()) == ['id', 'email']
diff --git a/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_types.py b/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_types.py
index 527a9fb4d..77bdfe941 100644
--- a/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_types.py
+++ b/graphene-sqlalchemy/graphene_sqlalchemy/tests/test_types.py
@@ -49,7 +49,7 @@ def test_sqlalchemy_interface():
 def test_objecttype_registered():
     assert issubclass(Character, ObjectType)
     assert Character._meta.model == Reporter
-    assert Character._meta.fields.keys() == ['id', 'first_name', 'last_name', 'email', 'pets', 'articles']
+    assert list(Character._meta.fields.keys()) == ['id', 'first_name', 'last_name', 'email', 'pets', 'articles']
 
 
 # def test_sqlalchemynode_idfield():
@@ -70,5 +70,5 @@ def test_node_replacedfield():
 
 def test_object_type():
     assert issubclass(Human, ObjectType)
-    assert Human._meta.fields.keys() == ['id', 'pub_date', 'headline', 'reporter_id', 'reporter']
+    assert list(Human._meta.fields.keys()) == ['id', 'pub_date', 'headline', 'reporter_id', 'reporter']
     assert is_node(Human)
diff --git a/graphene-sqlalchemy/setup.py b/graphene-sqlalchemy/setup.py
index cefcdc577..ad2851ff7 100644
--- a/graphene-sqlalchemy/setup.py
+++ b/graphene-sqlalchemy/setup.py
@@ -34,6 +34,7 @@
     install_requires=[
         'six>=1.10.0',
         'graphene>=1.0',
+        'SQLAlchemy',
         'singledispatch>=3.4.0.3',
     ],
     tests_require=[
diff --git a/graphene/relay/tests/test_connection.py b/graphene/relay/tests/test_connection.py
index 98b8ca4b9..69d2cbf0e 100644
--- a/graphene/relay/tests/test_connection.py
+++ b/graphene/relay/tests/test_connection.py
@@ -34,7 +34,7 @@ class RootQuery(ObjectType):
 def test_connection():
     assert MyObjectConnection._meta.name == 'MyObjectConnection'
     fields = MyObjectConnection._meta.fields
-    assert fields.keys() == ['page_info', 'edges', 'extra']
+    assert list(fields.keys()) == ['page_info', 'edges', 'extra']
     edge_field = fields['edges']
     pageinfo_field = fields['page_info']
 
@@ -51,7 +51,7 @@ def test_edge():
     Edge = MyObjectConnection.Edge
     assert Edge._meta.name == 'MyObjectEdge'
     edge_fields = Edge._meta.fields
-    assert edge_fields.keys() == ['node', 'cursor', 'other']
+    assert list(edge_fields.keys()) == ['node', 'cursor', 'other']
 
     assert isinstance(edge_fields['node'], Field)
     assert edge_fields['node'].type == MyObject
@@ -63,4 +63,4 @@ def test_edge():
 def test_pageinfo():
     assert PageInfo._meta.name == 'PageInfo'
     fields = PageInfo._meta.fields
-    assert fields.keys() == ['has_next_page', 'has_previous_page', 'start_cursor', 'end_cursor']
+    assert list(fields.keys()) == ['has_next_page', 'has_previous_page', 'start_cursor', 'end_cursor']
diff --git a/graphene/relay/tests/test_mutation.py b/graphene/relay/tests/test_mutation.py
index 43edd16bb..acbc5114b 100644
--- a/graphene/relay/tests/test_mutation.py
+++ b/graphene/relay/tests/test_mutation.py
@@ -38,11 +38,11 @@ class MyMutation(ClientIDMutation):
 
 def test_mutation():
     fields = SaySomething._meta.fields
-    assert fields.keys() == ['phrase']
+    assert list(fields.keys()) == ['phrase']
     assert isinstance(fields['phrase'], Field)
     field = SaySomething.Field()
     assert field.type == SaySomething
-    assert field.args.keys() == ['input']
+    assert list(field.args.keys()) == ['input']
     assert isinstance(field.args['input'], Argument)
     assert field.args['input'].type == SaySomething.Input
 
@@ -51,7 +51,7 @@ def test_mutation_input():
     Input = SaySomething.Input
     assert issubclass(Input, InputObjectType)
     fields = Input._meta.fields
-    assert fields.keys() == ['what', 'client_mutation_id']
+    assert list(fields.keys()) == ['what', 'client_mutation_id']
     assert isinstance(fields['what'], InputField)
     assert fields['what'].type == String
     assert isinstance(fields['client_mutation_id'], InputField)
diff --git a/graphene/types/argument.py b/graphene/types/argument.py
index 9720eb758..471102d48 100644
--- a/graphene/types/argument.py
+++ b/graphene/types/argument.py
@@ -22,7 +22,7 @@ def __init__(self, type, default_value=None, description=None, name=None, requir
 def to_arguments(args, extra_args):
     from .unmountedtype import UnmountedType
     extra_args = sorted(extra_args.items(), key=lambda f: f[1])
-    iter_arguments = chain(args.items() + extra_args)
+    iter_arguments = chain(args.items(), extra_args)
     arguments = OrderedDict()
     for default_name, arg in iter_arguments:
         if isinstance(arg, UnmountedType):
diff --git a/graphene/types/tests/test_abstracttype.py b/graphene/types/tests/test_abstracttype.py
index ab5cb43e2..171a229fc 100644
--- a/graphene/types/tests/test_abstracttype.py
+++ b/graphene/types/tests/test_abstracttype.py
@@ -37,6 +37,6 @@ class MyAbstractType1(AbstractType):
     class MyAbstractType2(MyAbstractType1):
         field2 = UnmountedType(MyType)
 
-    assert MyAbstractType2._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyAbstractType2._meta.fields.keys()) == ['field1', 'field2']
     assert not hasattr(MyAbstractType1, 'field1')
     assert not hasattr(MyAbstractType2, 'field2')
diff --git a/graphene/types/tests/test_definition.py b/graphene/types/tests/test_definition.py
index 13a0befcd..89ee1fb40 100644
--- a/graphene/types/tests/test_definition.py
+++ b/graphene/types/tests/test_definition.py
@@ -137,7 +137,6 @@ class SomeSubscription(Mutation):
         subscription=SomeSubscription
     )
 
-    print schema.get_type_map()
     assert schema.get_type_map()['NestedInputObject'].graphene_type is NestedInputObject
 
 
diff --git a/graphene/types/tests/test_field.py b/graphene/types/tests/test_field.py
index 31fcf037c..b8b2e14fd 100644
--- a/graphene/types/tests/test_field.py
+++ b/graphene/types/tests/test_field.py
@@ -66,7 +66,7 @@ def test_field_source_func():
 def test_field_source_argument_as_kw():
     MyType = object()
     field = Field(MyType, b=NonNull(True), c=Argument(None), a=NonNull(False))
-    assert field.args.keys() == ['b', 'c', 'a']
+    assert list(field.args.keys()) == ['b', 'c', 'a']
     assert isinstance(field.args['b'], Argument)
     assert isinstance(field.args['b'].type, NonNull)
     assert field.args['b'].type.of_type is True
diff --git a/graphene/types/tests/test_inputobjecttype.py b/graphene/types/tests/test_inputobjecttype.py
index 52796749f..c5906574a 100644
--- a/graphene/types/tests/test_inputobjecttype.py
+++ b/graphene/types/tests/test_inputobjecttype.py
@@ -68,7 +68,7 @@ class MyAbstractType(AbstractType):
     class MyInputObjectType(InputObjectType, MyAbstractType):
         field2 = MyScalar(MyType)
 
-    assert MyInputObjectType._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyInputObjectType._meta.fields.keys()) == ['field1', 'field2']
     assert [type(x) for x in MyInputObjectType._meta.fields.values()] == [InputField, InputField]
 
 
@@ -79,5 +79,5 @@ class MyAbstractType(AbstractType):
     class MyInputObjectType(MyAbstractType, InputObjectType):
         field2 = MyScalar(MyType)
 
-    assert MyInputObjectType._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyInputObjectType._meta.fields.keys()) == ['field1', 'field2']
     assert [type(x) for x in MyInputObjectType._meta.fields.values()] == [InputField, InputField]
diff --git a/graphene/types/tests/test_interface.py b/graphene/types/tests/test_interface.py
index b15c85c54..724bbd049 100644
--- a/graphene/types/tests/test_interface.py
+++ b/graphene/types/tests/test_interface.py
@@ -67,7 +67,7 @@ class MyAbstractType(AbstractType):
     class MyInterface(Interface, MyAbstractType):
         field2 = MyScalar()
 
-    assert MyInterface._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyInterface._meta.fields.keys()) == ['field1', 'field2']
     assert [type(x) for x in MyInterface._meta.fields.values()] == [Field, Field]
 
 
@@ -79,7 +79,7 @@ class MyInterface(MyBaseInterface):
         field2 = MyScalar()
 
     assert MyInterface._meta.name == 'MyInterface'
-    assert MyInterface._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyInterface._meta.fields.keys()) == ['field1', 'field2']
     assert [type(x) for x in MyInterface._meta.fields.values()] == [Field, Field]
 
 
@@ -90,5 +90,5 @@ class MyAbstractType(AbstractType):
     class MyInterface(MyAbstractType, Interface):
         field2 = MyScalar()
 
-    assert MyInterface._meta.fields.keys() == ['field1', 'field2']
+    assert list(MyInterface._meta.fields.keys()) == ['field1', 'field2']
     assert [type(x) for x in MyInterface._meta.fields.values()] == [Field, Field]
diff --git a/graphene/types/tests/test_objecttype.py b/graphene/types/tests/test_objecttype.py
index 3da688f59..5ea7c7aa4 100644
--- a/graphene/types/tests/test_objecttype.py
+++ b/graphene/types/tests/test_objecttype.py
@@ -79,8 +79,8 @@ class MyAbstractType(AbstractType):
     class MyObjectType(ObjectType, MyAbstractType):
         field2 = MyScalar()
 
-    assert MyObjectType._meta.fields.keys() == ['field1', 'field2']
-    assert [type(x) for x in MyObjectType._meta.fields.values()] == [Field, Field]
+    assert list(MyObjectType._meta.fields.keys()) == ['field1', 'field2']
+    assert list(map(type, MyObjectType._meta.fields.values())) == [Field, Field]
 
 
 def test_generate_objecttype_inherit_abstracttype_reversed():
@@ -90,8 +90,8 @@ class MyAbstractType(AbstractType):
     class MyObjectType(MyAbstractType, ObjectType):
         field2 = MyScalar()
 
-    assert MyObjectType._meta.fields.keys() == ['field1', 'field2']
-    assert [type(x) for x in MyObjectType._meta.fields.values()] == [Field, Field]
+    assert list(MyObjectType._meta.fields.keys()) == ['field1', 'field2']
+    assert list(map(type, MyObjectType._meta.fields.values())) == [Field, Field]
 
 
 def test_generate_objecttype_unmountedtype():
diff --git a/graphene/types/tests/test_typemap.py b/graphene/types/tests/test_typemap.py
index 61ff7d122..1d2508375 100644
--- a/graphene/types/tests/test_typemap.py
+++ b/graphene/types/tests/test_typemap.py
@@ -57,11 +57,12 @@ def resolve_foo(self, args, info):
     assert graphql_type.description == 'Description'
 
     fields = graphql_type.get_fields()
-    assert fields.keys() == ['foo', 'gizmo']
+    assert list(fields.keys()) == ['foo', 'gizmo']
     foo_field = fields['foo']
     assert isinstance(foo_field, GraphQLField)
     assert foo_field.description == 'Field description'
-    assert foo_field.resolver == MyObjectType.resolve_foo.__func__
+    f = MyObjectType.resolve_foo
+    assert foo_field.resolver == getattr(f, '__func__', f)
     assert foo_field.args == {
         'bar': GraphQLArgument(GraphQLString, description='Argument description', default_value='x')
     }
@@ -74,9 +75,9 @@ class MyObjectType(ObjectType):
 
     typemap = TypeMap([MyObjectType])
     assert 'MyObjectType' in typemap
-    assert MyObjectType._meta.fields.keys() == ['bar']
+    assert list(MyObjectType._meta.fields.keys()) == ['bar']
     graphql_type = typemap['MyObjectType']
 
     fields = graphql_type.get_fields()
-    assert fields.keys() == ['bar']
+    assert list(fields.keys()) == ['bar']
     assert fields['bar'].type == GraphQLString
diff --git a/graphene/types/typemap.py b/graphene/types/typemap.py
index c89b500b1..8982d436c 100644
--- a/graphene/types/typemap.py
+++ b/graphene/types/typemap.py
@@ -244,8 +244,11 @@ def get_resolver_for_type(cls, type, name):
                     break
             resolver = interface_resolver
         # Only if is not decorated with classmethod
-        if resolver and not getattr(resolver, '__self__', True):
-            return resolver.__func__
+        if resolver:
+            if not getattr(resolver, '__self__', True):
+                return resolver.__func__
+            return resolver
+
         return partial(cls.default_resolver, name)
 
     @classmethod