diff --git a/Lib/ctypes/_aix.py b/Lib/ctypes/_aix.py
index 190cac6..26959d9 100644
--- a/Lib/ctypes/_aix.py
+++ b/Lib/ctypes/_aix.py
@@ -282,7 +282,7 @@ def find_shared(paths, name):
         if path.exists(archive):
             members = get_shared(get_ld_headers(archive))
             member = get_member(re.escape(name), members)
-            if member != None:
+            if member is not None:
                 return (base, member)
             else:
                 return (None, None)
@@ -307,7 +307,7 @@ def find_library(name):
 
     libpaths = get_libpaths()
     (base, member) = find_shared(libpaths, name)
-    if base != None:
+    if base is not None:
         return f"{base}({member})"
 
     # To get here, a member in an archive has not been found
diff --git a/Lib/email/contentmanager.py b/Lib/email/contentmanager.py
index 3cf62dc..fcf278d 100644
--- a/Lib/email/contentmanager.py
+++ b/Lib/email/contentmanager.py
@@ -144,7 +144,7 @@ def _encode_text(string, charset, cte, policy):
     linesep = policy.linesep.encode('ascii')
     def embedded_body(lines): return linesep.join(lines) + linesep
     def normal_body(lines): return b'\n'.join(lines) + b'\n'
-    if cte==None:
+    if cte is None:
         # Use heuristics to decide on the "best" encoding.
         if max((len(x) for x in lines), default=0) <= policy.max_line_length:
             try:
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index 316cf0b..6414f1a 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -344,7 +344,7 @@ def test_comparison(self):
         with self.assertRaises(TypeError): timezone(ZERO) < timezone(ZERO)
         self.assertIn(timezone(ZERO), {timezone(ZERO)})
         self.assertTrue(timezone(ZERO) != None)
-        self.assertFalse(timezone(ZERO) ==  None)
+        self.assertFalse(timezone(ZERO) == None)
 
         tz = timezone(ZERO)
         self.assertTrue(tz == ALWAYS_EQ)
diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index e2e9475..0c17812 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -136,7 +136,7 @@ def test_openpty(self):
             mode = None
 
         new_stdin_winsz = None
-        if self.stdin_rows != None and self.stdin_cols != None:
+        if self.stdin_rows is not None and self.stdin_cols is not None:
             try:
                 # Modify pty.STDIN_FILENO window size; we need to
                 # check if pty.openpty() is able to set pty slave
diff --git a/Lib/test/test_type_annotations.py b/Lib/test/test_type_annotations.py
index f6c99bd..87f46c2c 100644
--- a/Lib/test/test_type_annotations.py
+++ b/Lib/test/test_type_annotations.py
@@ -71,7 +71,7 @@ def __annotations__(self, value):
 
             @__annotations__.deleter
             def __annotations__(self):
-                if hasattr(self, 'my_annotations') and self.my_annotations == None:
+                if getattr(self, 'my_annotations', False) is None:
                     raise AttributeError('__annotations__')
                 self.my_annotations = None