diff --git a/graphql/backend/__init__.py b/graphql/backend/__init__.py
index b3d714f0..87e9493e 100644
--- a/graphql/backend/__init__.py
+++ b/graphql/backend/__init__.py
@@ -9,7 +9,7 @@
 from .decider import GraphQLDeciderBackend
 from .cache import GraphQLCachedBackend
 
-if False:
+if False:  # flake8: noqa
     from typing import Union
 
 _default_backend = None
diff --git a/graphql/backend/base.py b/graphql/backend/base.py
index 909942ac..ee6c143e 100644
--- a/graphql/backend/base.py
+++ b/graphql/backend/base.py
@@ -4,7 +4,7 @@
 from abc import ABCMeta, abstractmethod
 import six
 
-if False:
+if False:  # flake8: noqa
     from typing import Dict, Optional, Union, Callable
     from ..language.ast import Document
     from ..type.schema import GraphQLSchema
diff --git a/graphql/backend/cache.py b/graphql/backend/cache.py
index 683d976e..1ecd1267 100644
--- a/graphql/backend/cache.py
+++ b/graphql/backend/cache.py
@@ -4,7 +4,7 @@
 
 from .base import GraphQLBackend
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Dict, Optional, Union, Tuple, Hashable
     from .base import GraphQLDocument
 
diff --git a/graphql/backend/compiled.py b/graphql/backend/compiled.py
index d7950bc9..7dc88e50 100644
--- a/graphql/backend/compiled.py
+++ b/graphql/backend/compiled.py
@@ -1,7 +1,7 @@
 from six import string_types
 from .base import GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from ..type.schema import GraphQLSchema
     from typing import Any, Optional, Dict, Callable, Union
 
diff --git a/graphql/backend/core.py b/graphql/backend/core.py
index e5118426..9368c7de 100644
--- a/graphql/backend/core.py
+++ b/graphql/backend/core.py
@@ -8,7 +8,7 @@
 
 from .base import GraphQLBackend, GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Optional, Union
     from .base import GraphQLDocument
     from ..language.ast import Document
diff --git a/graphql/backend/decider.py b/graphql/backend/decider.py
index c4d1b3b4..6019393c 100644
--- a/graphql/backend/decider.py
+++ b/graphql/backend/decider.py
@@ -1,6 +1,6 @@
 from .base import GraphQLBackend, GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from typing import List, Union, Any, Optional
     from ..type.schema import GraphQLSchema
 
diff --git a/graphql/error/base.py b/graphql/error/base.py
index d1310acd..f84482f2 100644
--- a/graphql/error/base.py
+++ b/graphql/error/base.py
@@ -1,7 +1,7 @@
 import six
 from ..language.location import get_location
 
-if False:
+if False:  # flake8: noqa
     from ..language.source import Source
     from ..language.location import SourceLocation
     from types import TracebackType
diff --git a/graphql/error/format_error.py b/graphql/error/format_error.py
index 4592e850..f7c9cb52 100644
--- a/graphql/error/format_error.py
+++ b/graphql/error/format_error.py
@@ -2,7 +2,7 @@
 
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from .base import GraphQLError
     from .located_error import GraphQLLocatedError
     from typing import Any, Dict, Union
diff --git a/graphql/error/located_error.py b/graphql/error/located_error.py
index ea4284d4..3bf70c98 100644
--- a/graphql/error/located_error.py
+++ b/graphql/error/located_error.py
@@ -2,7 +2,7 @@
 
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Field
     from typing import List, Union
 
diff --git a/graphql/error/syntax_error.py b/graphql/error/syntax_error.py
index 480c1fb7..4be4a4b4 100644
--- a/graphql/error/syntax_error.py
+++ b/graphql/error/syntax_error.py
@@ -1,7 +1,7 @@
 from ..language.location import get_location
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from ..language.source import Source
     from ..language.location import SourceLocation
 
diff --git a/graphql/error/tests/test_base.py b/graphql/error/tests/test_base.py
index 740e0023..28d8e2a3 100644
--- a/graphql/error/tests/test_base.py
+++ b/graphql/error/tests/test_base.py
@@ -5,7 +5,7 @@
 from graphql.language.parser import parse
 from graphql.type import GraphQLField, GraphQLObjectType, GraphQLSchema, GraphQLString
 
-if False:
+if False:  # flake8: noqa
     from graphql.execution.base import ResolveInfo
     from typing import Any
     from typing import Optional
diff --git a/graphql/execution/base.py b/graphql/execution/base.py
index 985c24c3..36c42428 100644
--- a/graphql/execution/base.py
+++ b/graphql/execution/base.py
@@ -12,7 +12,7 @@
 )
 from ..error.format_error import format_error as default_format_error
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Optional, Dict, List, Union
     from ..language.ast import Field, OperationDefinition
     from ..type.definition import GraphQLList, GraphQLObjectType, GraphQLScalarType
diff --git a/graphql/execution/executor.py b/graphql/execution/executor.py
index f759055c..f23f59c4 100644
--- a/graphql/execution/executor.py
+++ b/graphql/execution/executor.py
@@ -35,7 +35,7 @@
 from .executors.sync import SyncExecutor
 from .middleware import MiddlewareManager
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Optional, Union, Dict, List, Callable
     from rx import Observable
     from ..type.schema import GraphQLSchema
diff --git a/graphql/execution/executors/asyncio.py b/graphql/execution/executors/asyncio.py
index afb8a968..27637c23 100644
--- a/graphql/execution/executors/asyncio.py
+++ b/graphql/execution/executors/asyncio.py
@@ -4,7 +4,7 @@
 
 from promise import Promise
 
-if False:
+if False:  # flake8: noqa
     from asyncio.unix_events import _UnixSelectorEventLoop
     from typing import Optional, Any, Callable
 
diff --git a/graphql/execution/executors/sync.py b/graphql/execution/executors/sync.py
index 58295d1a..df8aabb6 100644
--- a/graphql/execution/executors/sync.py
+++ b/graphql/execution/executors/sync.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from typing import Any, Callable
 
 
diff --git a/graphql/execution/executors/thread.py b/graphql/execution/executors/thread.py
index 9d682b64..35210d99 100644
--- a/graphql/execution/executors/thread.py
+++ b/graphql/execution/executors/thread.py
@@ -4,7 +4,7 @@
 from promise import Promise
 from .utils import process
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Callable
 
 
diff --git a/graphql/execution/executors/utils.py b/graphql/execution/executors/utils.py
index 1cab3ff4..41cd29d1 100644
--- a/graphql/execution/executors/utils.py
+++ b/graphql/execution/executors/utils.py
@@ -1,6 +1,6 @@
 from sys import exc_info
 
-if False:
+if False:  # flake8: noqa
     from ..base import ResolveInfo
     from promise import Promise
     from typing import Callable, Dict, Tuple, Union
diff --git a/graphql/execution/middleware.py b/graphql/execution/middleware.py
index 0c7f82d3..0880858b 100644
--- a/graphql/execution/middleware.py
+++ b/graphql/execution/middleware.py
@@ -4,7 +4,7 @@
 
 from promise import Promise
 
-if False:
+if False:  # flake8: noqa
     from .base import ResolveInfo
     from typing import Any, Callable, Iterator, Tuple, Union, List, Dict
 
diff --git a/graphql/execution/tests/test_nonnull.py b/graphql/execution/tests/test_nonnull.py
index 8a44fa9e..ebd1e844 100644
--- a/graphql/execution/tests/test_nonnull.py
+++ b/graphql/execution/tests/test_nonnull.py
@@ -12,7 +12,7 @@
 
 from .utils import rejected, resolved
 
-if False:
+if False:  # flake8: noqa
     from promise import Promise
     from typing import Any, Optional, Dict, Tuple, Union
 
diff --git a/graphql/execution/tests/test_subscribe.py b/graphql/execution/tests/test_subscribe.py
index 661113f0..f6ad3f34 100644
--- a/graphql/execution/tests/test_subscribe.py
+++ b/graphql/execution/tests/test_subscribe.py
@@ -15,7 +15,7 @@
     subscribe,
 )
 
-if False:
+if False:  # flake8: noqa
     from graphql.execution.base import ResolveInfo
     from rx import Observable
     from typing import Optional, Union, Any, Callable, Tuple
diff --git a/graphql/execution/utils.py b/graphql/execution/utils.py
index 6229eb1b..bbab86c3 100644
--- a/graphql/execution/utils.py
+++ b/graphql/execution/utils.py
@@ -15,7 +15,7 @@
 from ..utils.type_from_ast import type_from_ast
 from .values import get_argument_values, get_variable_values
 
-if False:
+if False:  # flake8: noqa
     from ..type.definition import GraphQLObjectType, GraphQLField
     from ..type.schema import GraphQLSchema
     from ..language.ast import (
diff --git a/graphql/execution/values.py b/graphql/execution/values.py
index 289273ab..a0568321 100644
--- a/graphql/execution/values.py
+++ b/graphql/execution/values.py
@@ -18,7 +18,7 @@
 from ..utils.type_from_ast import type_from_ast
 from ..utils.value_from_ast import value_from_ast
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import VariableDefinition, Argument
     from ..type.schema import GraphQLSchema
     from ..type.definition import GraphQLArgument
diff --git a/graphql/graphql.py b/graphql/graphql.py
index ef695bad..f7c394b7 100644
--- a/graphql/graphql.py
+++ b/graphql/graphql.py
@@ -3,7 +3,7 @@
 
 from promise import promisify
 
-if False:
+if False:  # flake8: noqa
     from rx import Observable
     from typing import Any, Union, Optional
     from .language.ast import Document
diff --git a/graphql/language/ast.py b/graphql/language/ast.py
index e9cb307c..7a31e453 100644
--- a/graphql/language/ast.py
+++ b/graphql/language/ast.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from .parser import Loc
     from typing import Any, Optional, Union, List, Tuple, Iterable
 
diff --git a/graphql/language/lexer.py b/graphql/language/lexer.py
index dbc11401..a41c4976 100644
--- a/graphql/language/lexer.py
+++ b/graphql/language/lexer.py
@@ -4,7 +4,7 @@
 
 from ..error import GraphQLSyntaxError
 
-if False:
+if False:  # flake8: noqa
     from typing import Optional
     from .source import Source
 
diff --git a/graphql/language/location.py b/graphql/language/location.py
index 973743b0..6cf48f50 100644
--- a/graphql/language/location.py
+++ b/graphql/language/location.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from .source import Source
     from typing import Any
 
diff --git a/graphql/language/parser.py b/graphql/language/parser.py
index fd7e5494..f8a20b84 100644
--- a/graphql/language/parser.py
+++ b/graphql/language/parser.py
@@ -5,7 +5,7 @@
 from .lexer import Lexer, TokenKind, get_token_desc, get_token_kind_desc
 from .source import Source
 
-if False:
+if False:  # flake8: noqa
     from typing import Dict, Union, Any, Optional, Callable, List
     from ..error.syntax_error import GraphQLSyntaxError
     from .source import Source
diff --git a/graphql/language/printer.py b/graphql/language/printer.py
index 3c6c1f7d..68bb0e4d 100644
--- a/graphql/language/printer.py
+++ b/graphql/language/printer.py
@@ -2,7 +2,7 @@
 
 from .visitor import Visitor, visit
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, List, Optional, Union
     from graphql.language.ast import (
         Node,
diff --git a/graphql/language/visitor.py b/graphql/language/visitor.py
index d5eda74e..4314b28f 100644
--- a/graphql/language/visitor.py
+++ b/graphql/language/visitor.py
@@ -5,7 +5,7 @@
 from . import ast
 from .visitor_meta import QUERY_DOCUMENT_KEYS, VisitorMeta
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, List, Optional, Union, Tuple, Dict
     from ..utils.type_info import TypeInfo
     from ..validation.validation import UsageVisitor
diff --git a/graphql/pyutils/cached_property.py b/graphql/pyutils/cached_property.py
index e1e0fc75..119b9e2a 100644
--- a/graphql/pyutils/cached_property.py
+++ b/graphql/pyutils/cached_property.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from typing import Any
 
 
diff --git a/graphql/pyutils/contain_subset.py b/graphql/pyutils/contain_subset.py
index 5b8f3f58..da3aea78 100644
--- a/graphql/pyutils/contain_subset.py
+++ b/graphql/pyutils/contain_subset.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from typing import Any, Dict
 
 obj = (dict, list, tuple)
diff --git a/graphql/pyutils/default_ordered_dict.py b/graphql/pyutils/default_ordered_dict.py
index 273e62fd..83a0b307 100644
--- a/graphql/pyutils/default_ordered_dict.py
+++ b/graphql/pyutils/default_ordered_dict.py
@@ -1,7 +1,7 @@
 import copy
 from collections import OrderedDict
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, List
 
 
diff --git a/graphql/pyutils/pair_set.py b/graphql/pyutils/pair_set.py
index f880ec3b..9b369a4c 100644
--- a/graphql/pyutils/pair_set.py
+++ b/graphql/pyutils/pair_set.py
@@ -1,4 +1,4 @@
-if False:
+if False:  # flake8: noqa
     from typing import Dict, Any
 
 
diff --git a/graphql/type/definition.py b/graphql/type/definition.py
index ec23d3dc..f7e0e7ba 100644
--- a/graphql/type/definition.py
+++ b/graphql/type/definition.py
@@ -7,7 +7,7 @@
 from ..utils.assert_valid_name import assert_valid_name
 from ..utils.undefined import Undefined
 
-if False:
+if False:  # flake8: noqa
     from typing import List, Dict, Any, Callable, Optional, Union, Type
 
 
diff --git a/graphql/type/introspection.py b/graphql/type/introspection.py
index c80170e1..1dafd80d 100644
--- a/graphql/type/introspection.py
+++ b/graphql/type/introspection.py
@@ -18,7 +18,7 @@
 from .directives import DirectiveLocation
 from .scalars import GraphQLBoolean, GraphQLString
 
-if False:
+if False:  # flake8: noqa
     from ..execution.base import ResolveInfo
     from typing import Union, List, Optional, Any
 
diff --git a/graphql/type/scalars.py b/graphql/type/scalars.py
index 4578023c..0169e825 100644
--- a/graphql/type/scalars.py
+++ b/graphql/type/scalars.py
@@ -3,7 +3,7 @@
 from ..language.ast import BooleanValue, FloatValue, IntValue, StringValue
 from .definition import GraphQLScalarType
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Optional, Union
 
 # As per the GraphQL Spec, Integers are only treated as valid when a valid
diff --git a/graphql/type/schema.py b/graphql/type/schema.py
index 0905749d..06cf5be6 100644
--- a/graphql/type/schema.py
+++ b/graphql/type/schema.py
@@ -5,7 +5,7 @@
 from .introspection import IntrospectionSchema
 from .typemap import GraphQLTypeMap
 
-if False:
+if False:  # flake8: noqa
     from .definition import GraphQLInterfaceType, GraphQLUnionType, GraphQLType
     from typing import Dict, Union, Any, List, Optional
 
diff --git a/graphql/type/typemap.py b/graphql/type/typemap.py
index f8eab077..aebff6f0 100644
--- a/graphql/type/typemap.py
+++ b/graphql/type/typemap.py
@@ -15,7 +15,7 @@
     is_output_type,
 )
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, List, Optional, Union
 
 
diff --git a/graphql/utils/ast_to_code.py b/graphql/utils/ast_to_code.py
index 659562c3..2db01b35 100644
--- a/graphql/utils/ast_to_code.py
+++ b/graphql/utils/ast_to_code.py
@@ -1,7 +1,7 @@
 from ..language.ast import Node
 from ..language.parser import Loc
 
-if False:
+if False:  # flake8: noqa
     from typing import Any
 
 
diff --git a/graphql/utils/concat_ast.py b/graphql/utils/concat_ast.py
index 41401829..8685bbc0 100644
--- a/graphql/utils/concat_ast.py
+++ b/graphql/utils/concat_ast.py
@@ -2,7 +2,7 @@
 
 from ..language.ast import Document
 
-if False:
+if False:  # flake8: noqa
     from typing import Iterable
 
 
diff --git a/graphql/utils/get_field_def.py b/graphql/utils/get_field_def.py
index c7efca75..5b06973f 100644
--- a/graphql/utils/get_field_def.py
+++ b/graphql/utils/get_field_def.py
@@ -5,7 +5,7 @@
     TypeNameMetaFieldDef,
 )
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Field
     from ..type.definition import GraphQLField, GraphQLInterfaceType, GraphQLObjectType
     from ..type.schema import GraphQLSchema
diff --git a/graphql/utils/get_operation_ast.py b/graphql/utils/get_operation_ast.py
index 74fd5a2c..56dccd4e 100644
--- a/graphql/utils/get_operation_ast.py
+++ b/graphql/utils/get_operation_ast.py
@@ -1,6 +1,6 @@
 from ..language import ast
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Document, OperationDefinition
     from typing import Optional
 
diff --git a/graphql/utils/is_valid_literal_value.py b/graphql/utils/is_valid_literal_value.py
index f91c842b..47d7c13a 100644
--- a/graphql/utils/is_valid_literal_value.py
+++ b/graphql/utils/is_valid_literal_value.py
@@ -8,7 +8,7 @@
     GraphQLScalarType,
 )
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import ObjectValue, StringValue
     from ..type.definition import GraphQLInputObjectType, GraphQLScalarType
     from typing import Union, Any, List
diff --git a/graphql/utils/is_valid_value.py b/graphql/utils/is_valid_value.py
index 857b724a..2dd83bfc 100644
--- a/graphql/utils/is_valid_value.py
+++ b/graphql/utils/is_valid_value.py
@@ -15,7 +15,7 @@
     GraphQLScalarType,
 )
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, List
 
 _empty_list = []  # type: List
diff --git a/graphql/utils/quoted_or_list.py b/graphql/utils/quoted_or_list.py
index 22d6aa48..c968b73f 100644
--- a/graphql/utils/quoted_or_list.py
+++ b/graphql/utils/quoted_or_list.py
@@ -1,6 +1,6 @@
 import functools
 
-if False:
+if False:  # flake8: noqa
     from typing import List
 
 
diff --git a/graphql/utils/schema_printer.py b/graphql/utils/schema_printer.py
index 13146d10..5fe2df68 100644
--- a/graphql/utils/schema_printer.py
+++ b/graphql/utils/schema_printer.py
@@ -11,7 +11,7 @@
 from .ast_from_value import ast_from_value
 
 
-if False:
+if False:  # flake8: noqa
     from ..type.definition import (
         GraphQLArgument,
         GraphQLType,
diff --git a/graphql/utils/type_comparators.py b/graphql/utils/type_comparators.py
index 90388fd5..2e6b2bbc 100644
--- a/graphql/utils/type_comparators.py
+++ b/graphql/utils/type_comparators.py
@@ -7,7 +7,7 @@
     is_abstract_type,
 )
 
-if False:
+if False:  # flake8: noqa
     from ..type.typemap import GraphQLTypeMap
     from ..type.definition import (
         GraphQLScalarType,
diff --git a/graphql/utils/type_from_ast.py b/graphql/utils/type_from_ast.py
index 58719c41..c3a0d411 100644
--- a/graphql/utils/type_from_ast.py
+++ b/graphql/utils/type_from_ast.py
@@ -1,7 +1,7 @@
 from ..language import ast
 from ..type.definition import GraphQLList, GraphQLNonNull
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import ListType, NamedType, NonNullType
     from ..type.schema import GraphQLSchema
     from typing import Any, Union
diff --git a/graphql/utils/type_info.py b/graphql/utils/type_info.py
index de07ddb7..9f87f7c4 100644
--- a/graphql/utils/type_info.py
+++ b/graphql/utils/type_info.py
@@ -11,7 +11,7 @@
 from .get_field_def import get_field_def
 from .type_from_ast import type_from_ast
 
-if False:
+if False:  # flake8: noqa
     from ..type.schema import GraphQLSchema
     from ..type.definition import (
         GraphQLType,
diff --git a/graphql/utils/value_from_ast.py b/graphql/utils/value_from_ast.py
index f7a730f0..f8a78c70 100644
--- a/graphql/utils/value_from_ast.py
+++ b/graphql/utils/value_from_ast.py
@@ -7,7 +7,7 @@
     GraphQLScalarType,
 )
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Node
     from ..type.definition import GraphQLType
     from typing import Any, Dict, Union, Optional, List
diff --git a/graphql/validation/rules/arguments_of_correct_type.py b/graphql/validation/rules/arguments_of_correct_type.py
index 416e36bd..d9d7d950 100644
--- a/graphql/validation/rules/arguments_of_correct_type.py
+++ b/graphql/validation/rules/arguments_of_correct_type.py
@@ -3,7 +3,7 @@
 from ...utils.is_valid_literal_value import is_valid_literal_value
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Argument
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/base.py b/graphql/validation/rules/base.py
index 368dc168..821dd747 100644
--- a/graphql/validation/rules/base.py
+++ b/graphql/validation/rules/base.py
@@ -1,6 +1,6 @@
 from ...language.visitor import Visitor
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
 
 
diff --git a/graphql/validation/rules/default_values_of_correct_type.py b/graphql/validation/rules/default_values_of_correct_type.py
index 3b2f52f8..d09500c4 100644
--- a/graphql/validation/rules/default_values_of_correct_type.py
+++ b/graphql/validation/rules/default_values_of_correct_type.py
@@ -4,7 +4,7 @@
 from ...utils.is_valid_literal_value import is_valid_literal_value
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Document, OperationDefinition, SelectionSet
     from typing import List, Union
 
diff --git a/graphql/validation/rules/fields_on_correct_type.py b/graphql/validation/rules/fields_on_correct_type.py
index 4ce057eb..f6446471 100644
--- a/graphql/validation/rules/fields_on_correct_type.py
+++ b/graphql/validation/rules/fields_on_correct_type.py
@@ -7,7 +7,7 @@
 from ...utils.suggestion_list import suggestion_list
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Field, InlineFragment
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/fragments_on_composite_types.py b/graphql/validation/rules/fragments_on_composite_types.py
index 1873ac5f..e775b700 100644
--- a/graphql/validation/rules/fragments_on_composite_types.py
+++ b/graphql/validation/rules/fragments_on_composite_types.py
@@ -3,7 +3,7 @@
 from ...type.definition import is_composite_type
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Field, InlineFragment
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/known_argument_names.py b/graphql/validation/rules/known_argument_names.py
index b9a7b1fd..e7b4839a 100644
--- a/graphql/validation/rules/known_argument_names.py
+++ b/graphql/validation/rules/known_argument_names.py
@@ -4,7 +4,7 @@
 from ...utils.suggestion_list import suggestion_list
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Argument
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/known_type_names.py b/graphql/validation/rules/known_type_names.py
index 7f147a98..b0a95aeb 100644
--- a/graphql/validation/rules/known_type_names.py
+++ b/graphql/validation/rules/known_type_names.py
@@ -3,7 +3,7 @@
 from ...utils.suggestion_list import suggestion_list
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import NamedType
     from typing import Any
 
diff --git a/graphql/validation/rules/lone_anonymous_operation.py b/graphql/validation/rules/lone_anonymous_operation.py
index 2699f759..89c480f6 100644
--- a/graphql/validation/rules/lone_anonymous_operation.py
+++ b/graphql/validation/rules/lone_anonymous_operation.py
@@ -2,7 +2,7 @@
 from ...language import ast
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import Any, List, Optional, Union
diff --git a/graphql/validation/rules/no_fragment_cycles.py b/graphql/validation/rules/no_fragment_cycles.py
index ccd9f8f3..6dfdf46b 100644
--- a/graphql/validation/rules/no_fragment_cycles.py
+++ b/graphql/validation/rules/no_fragment_cycles.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/rules/no_undefined_variables.py b/graphql/validation/rules/no_undefined_variables.py
index afa0db1b..77f3eb6e 100644
--- a/graphql/validation/rules/no_undefined_variables.py
+++ b/graphql/validation/rules/no_undefined_variables.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/rules/no_unused_fragments.py b/graphql/validation/rules/no_unused_fragments.py
index b4ba428a..76f8f35a 100644
--- a/graphql/validation/rules/no_unused_fragments.py
+++ b/graphql/validation/rules/no_unused_fragments.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union, Any, Optional
diff --git a/graphql/validation/rules/no_unused_variables.py b/graphql/validation/rules/no_unused_variables.py
index ed7b77fc..baca2daa 100644
--- a/graphql/validation/rules/no_unused_variables.py
+++ b/graphql/validation/rules/no_unused_variables.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/rules/overlapping_fields_can_be_merged.py b/graphql/validation/rules/overlapping_fields_can_be_merged.py
index 74a1e188..834acf50 100644
--- a/graphql/validation/rules/overlapping_fields_can_be_merged.py
+++ b/graphql/validation/rules/overlapping_fields_can_be_merged.py
@@ -17,7 +17,7 @@
 from ...utils.type_from_ast import type_from_ast
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import OperationDefinition, Field, InlineFragment, SelectionSet
     from ...type.definition import GraphQLUnionType, GraphQLField, GraphQLScalarType
diff --git a/graphql/validation/rules/possible_fragment_spreads.py b/graphql/validation/rules/possible_fragment_spreads.py
index 3cd8f1aa..d6b916c0 100644
--- a/graphql/validation/rules/possible_fragment_spreads.py
+++ b/graphql/validation/rules/possible_fragment_spreads.py
@@ -3,7 +3,7 @@
 from ...utils.type_from_ast import type_from_ast
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Field, InlineFragment
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/provided_non_null_arguments.py b/graphql/validation/rules/provided_non_null_arguments.py
index 190e9d03..1d727a0d 100644
--- a/graphql/validation/rules/provided_non_null_arguments.py
+++ b/graphql/validation/rules/provided_non_null_arguments.py
@@ -2,7 +2,7 @@
 from ...type.definition import GraphQLNonNull
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Field, InlineFragment
     from typing import Any, List, Optional, Union
 
diff --git a/graphql/validation/rules/scalar_leafs.py b/graphql/validation/rules/scalar_leafs.py
index 97755de0..76d25a24 100644
--- a/graphql/validation/rules/scalar_leafs.py
+++ b/graphql/validation/rules/scalar_leafs.py
@@ -2,7 +2,7 @@
 from ...type.definition import get_named_type, is_leaf_type
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ...language.ast import Field, InlineFragment
     from typing import Any, List, Union
 
diff --git a/graphql/validation/rules/unique_argument_names.py b/graphql/validation/rules/unique_argument_names.py
index b0f0adfb..60dfb2e6 100644
--- a/graphql/validation/rules/unique_argument_names.py
+++ b/graphql/validation/rules/unique_argument_names.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Field, InlineFragment, Argument
     from typing import Any, List, Union
diff --git a/graphql/validation/rules/unique_fragment_names.py b/graphql/validation/rules/unique_fragment_names.py
index ff1003f8..fe2141e7 100644
--- a/graphql/validation/rules/unique_fragment_names.py
+++ b/graphql/validation/rules/unique_fragment_names.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/rules/unique_input_field_names.py b/graphql/validation/rules/unique_input_field_names.py
index f5afbeb1..78a89a50 100644
--- a/graphql/validation/rules/unique_input_field_names.py
+++ b/graphql/validation/rules/unique_input_field_names.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Argument, ObjectValue, ObjectField
     from typing import Any, List, Union
diff --git a/graphql/validation/rules/unique_operation_names.py b/graphql/validation/rules/unique_operation_names.py
index da097447..6bfe70d5 100644
--- a/graphql/validation/rules/unique_operation_names.py
+++ b/graphql/validation/rules/unique_operation_names.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import Any, List, Optional, Union
diff --git a/graphql/validation/rules/unique_variable_names.py b/graphql/validation/rules/unique_variable_names.py
index 8d2ce3d3..2d966152 100644
--- a/graphql/validation/rules/unique_variable_names.py
+++ b/graphql/validation/rules/unique_variable_names.py
@@ -1,7 +1,7 @@
 from ...error import GraphQLError
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/rules/variables_in_allowed_position.py b/graphql/validation/rules/variables_in_allowed_position.py
index 6c62f449..8bcf1c52 100644
--- a/graphql/validation/rules/variables_in_allowed_position.py
+++ b/graphql/validation/rules/variables_in_allowed_position.py
@@ -4,7 +4,7 @@
 from ...utils.type_from_ast import type_from_ast
 from .base import ValidationRule
 
-if False:
+if False:  # flake8: noqa
     from ..validation import ValidationContext
     from ...language.ast import Document, OperationDefinition
     from typing import List, Union
diff --git a/graphql/validation/validation.py b/graphql/validation/validation.py
index 70596a34..b708f6a3 100644
--- a/graphql/validation/validation.py
+++ b/graphql/validation/validation.py
@@ -4,7 +4,7 @@
 from ..utils.type_info import TypeInfo
 from .rules import specified_rules
 
-if False:
+if False:  # flake8: noqa
     from typing import List, Union
     from ..language.ast import Document, OperationDefinition, SelectionSet
     from ..language.visitor_meta import VisitorMeta
diff --git a/setup.cfg b/setup.cfg
index 722f81b1..fef65f01 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [flake8]
-exclude = tests,scripts,setup.py,docs,graphql/execution/executors/asyncio_utils.py
+exclude = tests,scripts,setup.py,docs,graphql/execution/executors/asyncio_utils.py,conftest.py
 max-line-length = 200
 
 [coverage:run]