diff --git a/bots/zephyr_mirror_backend.py b/bots/zephyr_mirror_backend.py
index 89f9b700a7..7faa9cb604 100755
--- a/bots/zephyr_mirror_backend.py
+++ b/bots/zephyr_mirror_backend.py
@@ -386,10 +386,10 @@ def process_notice(notice, log):
     if options.forward_class_messages and notice.opcode.lower() == "crypt":
         body = decrypt_zephyr(zephyr_class, notice.instance.lower(), body)
 
-    zeph = { 'time': str(notice.time),
-             'sender': notice.sender,
-             'zsig': zsig,  # logged here but not used by app
-             'content': body}
+    zeph = {'time': str(notice.time),
+            'sender': notice.sender,
+            'zsig': zsig,  # logged here but not used by app
+            'content': body}
     if is_huddle:
         zeph['type'] = 'private'
         zeph['recipient'] = huddle_recipients
diff --git a/tools/lint-all b/tools/lint-all
index 44184c10e2..b2709c496c 100755
--- a/tools/lint-all
+++ b/tools/lint-all
@@ -82,7 +82,7 @@ def check_pep8(files):
     # type: (List[str]) -> bool
     failed = False
     ignored_rules = [
-        'E402', 'E501', 'W503', 'E711', 'E201', 'E128', 'E226',
+        'E402', 'E501', 'W503', 'E711', 'E128', 'E226',
         'E126', 'E121', 'E122', 'E123', 'E266', 'E265', 'E261', 'E221', 'E303',
         'E241', 'E712', 'E702', 'E401', 'E115', 'E114', 'E731', 'E302', 'E129',
         'E741', 'E714', 'W391', 'E713', 'E502', 'E131', 'E305', 'E251', 'E306',
diff --git a/tools/test-tools b/tools/test-tools
index cd1b014813..160fd372b8 100755
--- a/tools/test-tools
+++ b/tools/test-tools
@@ -29,7 +29,7 @@ if __name__ == '__main__':
 
     if args.coverage:
         import coverage
-        cov = coverage.Coverage(branch=True, omit=[ "*/zulip-venv-cache/*", dir_join(tools_test_dir, "*")])
+        cov = coverage.Coverage(branch=True, omit=["*/zulip-venv-cache/*", dir_join(tools_test_dir, "*")])
         cov.start()
 
     suite = loader.discover(start_dir=tools_test_dir, top_level_dir=root_dir)
diff --git a/zerver/tests/test_messages.py b/zerver/tests/test_messages.py
index cc68df9ad3..f87fd35efc 100644
--- a/zerver/tests/test_messages.py
+++ b/zerver/tests/test_messages.py
@@ -1006,7 +1006,7 @@ class EditMessageTest(ZulipTestCase):
             # type: (int, text_type, bool) -> None
             new_subject = 'subject' + unique_str
             new_content = 'content' + unique_str
-            params_dict = { 'message_id': id_, 'subject': new_subject}
+            params_dict = {'message_id': id_, 'subject': new_subject}
             if not topic_only:
                 params_dict['content'] = new_content
             result = self.client_post("/json/update_message", params_dict)
@@ -1023,7 +1023,7 @@ class EditMessageTest(ZulipTestCase):
             old_content = message.content
             new_subject = 'subject' + unique_str
             new_content = 'content' + unique_str
-            params_dict = { 'message_id': id_, 'subject': new_subject}
+            params_dict = {'message_id': id_, 'subject': new_subject}
             if not topic_only:
                 params_dict['content'] = new_content
             result = self.client_post("/json/update_message", params_dict)