diff --git a/mypy/checkexpr.py b/mypy/checkexpr.py
index 0ba58694792e..0ed9e4948d3d 100644
--- a/mypy/checkexpr.py
+++ b/mypy/checkexpr.py
@@ -4,7 +4,7 @@
 from contextlib import contextmanager
 from typing import (
     cast, Dict, Set, List, Tuple, Callable, Union, Optional, Iterable,
-    Sequence, Any, Iterator
+    Sequence, Iterator
 )
 MYPY = False
 if MYPY:
@@ -18,9 +18,8 @@
 from mypy.types import (
     Type, AnyType, CallableType, Overloaded, NoneTyp, TypeVarDef,
     TupleType, TypedDictType, Instance, TypeVarType, ErasedType, UnionType,
-    PartialType, DeletedType, UnboundType, UninhabitedType, TypeType, TypeOfAny,
-    true_only, false_only, is_named_instance, function_type, callable_type, FunctionLike,
-    get_typ_args, StarType
+    PartialType, DeletedType, UninhabitedType, TypeType, TypeOfAny, true_only,
+    false_only, is_named_instance, function_type, callable_type, FunctionLike, StarType,
 )
 from mypy.nodes import (
     NameExpr, RefExpr, Var, FuncDef, OverloadedFuncDef, TypeInfo, CallExpr,
@@ -45,13 +44,12 @@
 from mypy.infer import infer_type_arguments, infer_function_type_arguments
 from mypy import join
 from mypy.meet import narrow_declared_type
-from mypy.maptype import map_instance_to_supertype
 from mypy.subtypes import (
     is_subtype, is_proper_subtype, is_equivalent, find_member, non_method_protocol_members,
 )
 from mypy import applytype
 from mypy import erasetype
-from mypy.checkmember import analyze_member_access, type_object_type, bind_self
+from mypy.checkmember import analyze_member_access, type_object_type
 from mypy.constraints import get_actual_type
 from mypy.checkstrformat import StringFormatterChecker
 from mypy.expandtype import expand_type, expand_type_by_instance, freshen_function_type_vars
@@ -61,8 +59,6 @@
 from mypy.plugin import Plugin, MethodContext, MethodSigContext, FunctionContext
 from mypy.typeanal import make_optional_type
 
-from mypy import experiments
-
 # Type of callback user for checking individual function arguments. See
 # check_args() below for details.
 ArgChecker = Callable[[Type, Type, int, Type, int, int, CallableType, Context, MessageBuilder],
diff --git a/mypy/errors.py b/mypy/errors.py
index f8893290e32b..19028e12ab56 100644
--- a/mypy/errors.py
+++ b/mypy/errors.py
@@ -2,9 +2,8 @@
 import sys
 import traceback
 from collections import OrderedDict, defaultdict
-from contextlib import contextmanager
 
-from typing import Tuple, List, TypeVar, Set, Dict, Iterator, Optional, cast
+from typing import Tuple, List, TypeVar, Set, Dict, Optional
 
 from mypy.scope import Scope
 from mypy.options import Options
diff --git a/mypy/fastparse2.py b/mypy/fastparse2.py
index 713b8f2ff4b3..970d1f0ce000 100644
--- a/mypy/fastparse2.py
+++ b/mypy/fastparse2.py
@@ -14,7 +14,6 @@
 different class hierarchies, which made it difficult to write a shared visitor between the
 two in a typesafe way.
 """
-from functools import wraps
 import sys
 
 from typing import Tuple, Union, TypeVar, Callable, Sequence, Optional, Any, Dict, cast, List
diff --git a/mypy/main.py b/mypy/main.py
index 1c47affeae4e..588ea2a7cb57 100644
--- a/mypy/main.py
+++ b/mypy/main.py
@@ -9,13 +9,12 @@
 import sys
 import time
 
-from typing import Any, Dict, List, Mapping, Optional, Tuple, Callable
+from typing import Any, Dict, List, Mapping, Optional, Tuple
 
 from mypy import build
 from mypy import defaults
 from mypy import experiments
 from mypy import util
-from mypy.build import BuildResult
 from mypy.modulefinder import BuildSource, FindModuleCache, mypy_path, SearchPaths
 from mypy.find_sources import create_source_list, InvalidSourceList
 from mypy.fscache import FileSystemCache
diff --git a/mypy/stats.py b/mypy/stats.py
index 3c00d9440a68..888ab5eebf4e 100644
--- a/mypy/stats.py
+++ b/mypy/stats.py
@@ -1,6 +1,6 @@
 """Utilities for calculating and reporting statistics about types."""
 
-import os.path
+import os
 import typing
 
 from collections import Counter
diff --git a/mypy/util.py b/mypy/util.py
index bcf5d9edee99..3400cbdcfddd 100644
--- a/mypy/util.py
+++ b/mypy/util.py
@@ -1,6 +1,5 @@
 """Utility functions with no non-trivial dependencies."""
 import inspect
-import genericpath  # type: ignore  # no stub files yet
 import os
 import pathlib
 import re
diff --git a/scripts/dumpmodule.py b/scripts/dumpmodule.py
index 5d31241f4a0d..ac8470ece763 100644
--- a/scripts/dumpmodule.py
+++ b/scripts/dumpmodule.py
@@ -12,7 +12,6 @@
 import sys
 import types
 from typing import Text
-from collections import defaultdict
 
 
 if sys.version_info >= (3, 0):