diff --git a/hacking/checks/comments.py b/hacking/checks/comments.py
index 619c9cca..4034c1a7 100644
--- a/hacking/checks/comments.py
+++ b/hacking/checks/comments.py
@@ -59,14 +59,14 @@ def hacking_has_license(physical_line, filename, lines, line_number):
     # skip files that are < 10 lines, which isn't enough for a license to fit
     # this allows us to handle empty files, as well as not fail on the Okay
     # doctests.
-    if line_number is 1 and len(lines) > 10 and _project_is_apache():
+    if line_number == 1 and len(lines) > 10 and _project_is_apache():
         for idx, line in enumerate(lines):
             # if it's more than 10 characters in, it's probably not in the
             # header
             if 0 <= line.find('Licensed under the Apache License') < 10:
-                    license_found = True
+                license_found = True
             if 0 <= line.find('SPDX-License-Identifier:') < 10:
-                    license_found = True
+                license_found = True
         if not license_found:
             return (0, "H102: Apache 2.0 license header not found")
 
@@ -83,7 +83,7 @@ def hacking_has_correct_license(physical_line, filename, lines, line_number):
     # skip files that are < 10 lines, which isn't enough for a license to fit
     # this allows us to handle empty files, as well as not fail on the Okay
     # doctests.
-    if line_number is 1 and len(lines) > 10 and _project_is_apache():
+    if line_number == 1 and len(lines) > 10 and _project_is_apache():
         for idx, line in enumerate(lines):
             column = line.find('Licensed under the Apache License')
             if (0 < column < 10 and not
diff --git a/hacking/checks/docstrings.py b/hacking/checks/docstrings.py
index 6c6b894a..c419fa9b 100644
--- a/hacking/checks/docstrings.py
+++ b/hacking/checks/docstrings.py
@@ -118,7 +118,7 @@ def hacking_docstring_summary(physical_line, previous_logical, tokens):
             # not a multi line docstring
             return
         lines = docstring.split('\n')
-        if len(lines) > 1 and len(lines[1].strip()) is not 0:
+        if len(lines) > 1 and len(lines[1].strip()) != 0:
             # docstrings get tokenized on the last line of the docstring, so
             # we don't know the exact position.
             return (0, "H405: multi line docstring "
diff --git a/hacking/checks/python23.py b/hacking/checks/python23.py
index 4315cab8..91bc6396 100644
--- a/hacking/checks/python23.py
+++ b/hacking/checks/python23.py
@@ -224,5 +224,5 @@ def hacking_no_old_style_class(logical_line, noqa):
         return
     line = core.import_normalize(logical_line.strip())
     if line.startswith("class ") and not RE_NEW_STYLE_CLASS.match(line):
-            yield (0, "H238: old style class declaration, "
-                   "use new style (inherit from `object`)")
+        yield (0, "H238: old style class declaration, "
+               "use new style (inherit from `object`)")