diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index cc5f0c3..5bed868 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -9,8 +9,7 @@
 import collections
 
 from . import result
-from .util import (strclass, safe_repr, sorted_list_difference,
-                   unorderable_list_difference, _count_diff_all_purpose,
+from .util import (strclass, safe_repr, _count_diff_all_purpose,
                    _count_diff_hashable)
 
 __unittest = True
diff --git a/Lib/unittest/main.py b/Lib/unittest/main.py
index 55d4e4b..c50066f 100644
--- a/Lib/unittest/main.py
+++ b/Lib/unittest/main.py
@@ -2,7 +2,6 @@
 
 import sys
 import os
-import types
 
 from . import loader, runner
 from .signals import installHandler
diff --git a/Lib/unittest/result.py b/Lib/unittest/result.py
index 44bf186..97e5426 100644
--- a/Lib/unittest/result.py
+++ b/Lib/unittest/result.py
@@ -1,6 +1,5 @@
 """Test result object"""
 
-import os
 import io
 import sys
 import traceback
diff --git a/Lib/unittest/test/_test_warnings.py b/Lib/unittest/test/_test_warnings.py
index d0be18d..5cbfb53 100644
--- a/Lib/unittest/test/_test_warnings.py
+++ b/Lib/unittest/test/_test_warnings.py
@@ -10,7 +10,6 @@
 See #10535.
 """
 
-import io
 import sys
 import unittest
 import warnings