diff --git a/docs/conf.py b/docs/conf.py
index 0af7b9a7c93..142245c7488 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -10,7 +10,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
diff --git a/test/Driver/Dependencies/Inputs/fake-build-for-bitcode.py b/test/Driver/Dependencies/Inputs/fake-build-for-bitcode.py
index 83fa8f97392..58072fa75a9 100755
--- a/test/Driver/Dependencies/Inputs/fake-build-for-bitcode.py
+++ b/test/Driver/Dependencies/Inputs/fake-build-for-bitcode.py
@@ -6,7 +6,6 @@
 from __future__ import print_function
 
 import os
-import shutil
 import sys
 
 assert sys.argv[1] == '-frontend'
diff --git a/test/Driver/Dependencies/Inputs/fake-build-whole-module.py b/test/Driver/Dependencies/Inputs/fake-build-whole-module.py
index 51d47941cc5..22b938888c4 100755
--- a/test/Driver/Dependencies/Inputs/fake-build-whole-module.py
+++ b/test/Driver/Dependencies/Inputs/fake-build-whole-module.py
@@ -5,7 +5,6 @@
 from __future__ import print_function
 
 import os
-import shutil
 import sys
 
 assert sys.argv[1] == '-frontend'
diff --git a/test/Driver/Dependencies/Inputs/modify-non-primary-files.py b/test/Driver/Dependencies/Inputs/modify-non-primary-files.py
index efd226779ab..4866a8d2640 100755
--- a/test/Driver/Dependencies/Inputs/modify-non-primary-files.py
+++ b/test/Driver/Dependencies/Inputs/modify-non-primary-files.py
@@ -6,7 +6,6 @@
 from __future__ import print_function
 
 import os
-import shutil
 import sys
 
 assert sys.argv[1] == '-frontend'
diff --git a/utils/apply-fixit-edits.py b/utils/apply-fixit-edits.py
index 05b3b3cd22b..1bd84b58804 100755
--- a/utils/apply-fixit-edits.py
+++ b/utils/apply-fixit-edits.py
@@ -14,7 +14,6 @@
 
 from __future__ import print_function
 
-import subprocess
 import json
 import argparse
 import sys
diff --git a/utils/line-directive b/utils/line-directive
index 2ba36820b21..0f62f85fe71 100755
--- a/utils/line-directive
+++ b/utils/line-directive
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 #convert line numbers in error messages according to "line directive" comments
-import os
 import sys
 import re
 import bisect
diff --git a/utils/pass-pipeline/scripts/pipeline_generator.py b/utils/pass-pipeline/scripts/pipeline_generator.py
index befbd3413f6..12c78f69074 100755
--- a/utils/pass-pipeline/scripts/pipeline_generator.py
+++ b/utils/pass-pipeline/scripts/pipeline_generator.py
@@ -3,7 +3,6 @@
 import os
 import sys
 import argparse
-import itertools
 import json
 import textwrap
 
diff --git a/utils/pass-pipeline/scripts/pipelines_build_script.py b/utils/pass-pipeline/scripts/pipelines_build_script.py
index 1adee8b7e59..3644e3fbb37 100755
--- a/utils/pass-pipeline/scripts/pipelines_build_script.py
+++ b/utils/pass-pipeline/scripts/pipelines_build_script.py
@@ -9,7 +9,6 @@ import textwrap
 # Append the src dir
 sys.path.append(os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'src'))
 
-import pass_pipeline_library
 import passes
 
 # TODO: This should not be hard coded.
diff --git a/utils/pass-pipeline/src/pass_pipeline.py b/utils/pass-pipeline/src/pass_pipeline.py
index c47eccf5a52..fa713fb6767 100644
--- a/utils/pass-pipeline/src/pass_pipeline.py
+++ b/utils/pass-pipeline/src/pass_pipeline.py
@@ -1,8 +1,3 @@
-
-import sys
-import json
-import itertools
-
 class Pass(object):
     def __init__(self, name):
         self.name = name
diff --git a/utils/pygments/swift.py b/utils/pygments/swift.py
index b626e53f22d..c8d146a270e 100644
--- a/utils/pygments/swift.py
+++ b/utils/pygments/swift.py
@@ -2,7 +2,7 @@
 
 import re
 
-from pygments.lexer import Lexer, RegexLexer, include, bygroups, using, this, do_insertions
+from pygments.lexer import RegexLexer, include, bygroups
 from pygments.token import *
 
 __all__ = ['SwiftLexer', 'SwiftConsoleLexer']
diff --git a/utils/sil-opt-verify-all-modules.py b/utils/sil-opt-verify-all-modules.py
index 0bc6f9fed74..bdaa92d3b9e 100755
--- a/utils/sil-opt-verify-all-modules.py
+++ b/utils/sil-opt-verify-all-modules.py
@@ -17,7 +17,6 @@ import argparse
 import glob
 import multiprocessing
 import os
-import shutil
 import subprocess
 import sys
 import tempfile
diff --git a/utils/swift-bench.py b/utils/swift-bench.py
index 0f7612ae0bc..180070d78d6 100644
--- a/utils/swift-bench.py
+++ b/utils/swift-bench.py
@@ -38,7 +38,6 @@ from __future__ import print_function
 
 import subprocess
 import numpy
-import time
 import re
 import os
 import sys