diff --git a/Lib/test/test_al.py b/Lib/test/test_al.py
index 587bf1f..d7b5ec4 100755
--- a/Lib/test/test_al.py
+++ b/Lib/test/test_al.py
@@ -8,7 +8,7 @@
 alattrs = ['__doc__', '__name__', 'getdefault', 'getminmax', 'getname', 'getparams',
            'newconfig', 'openport', 'queryparams', 'setparams']
 
-# This is a very inobstrusive test for the existance of the al module and all it's
+# This is a very unobtrusive test for the existence of the al module and all it's
 # attributes.  More comprehensive examples can be found in Demo/al
 
 def main():
diff --git a/Lib/test/test_b1.py b/Lib/test/test_b1.py
index b063e5a..639a017 100644
--- a/Lib/test/test_b1.py
+++ b/Lib/test/test_b1.py
@@ -270,7 +270,7 @@
 # Different base:
 if int("10",16) <> 16L: raise TestFailed, 'int("10",16)'
 if int(u"10",16) <> 16L: raise TestFailed, 'int(u"10",16)'
-# Test conversion fron strings and various anomalies
+# Test conversion from strings and various anomalies
 L = [
         ('0', 0),
         ('1', 1),
diff --git a/Lib/test/test_cd.py b/Lib/test/test_cd.py
index 4d56158..9a45a7d 100755
--- a/Lib/test/test_cd.py
+++ b/Lib/test/test_cd.py
@@ -10,7 +10,7 @@
            'ident', 'index', 'msftoframe', 'open', 'pnum', 'ptime']
 
 
-# This is a very inobstrusive test for the existance of the cd module and all it's
+# This is a very inobtrusive test for the existence of the cd module and all it's
 # attributes.  More comprehensive examples can be found in Demo/cd and
 # require that you have a CD and a CD ROM drive
 
diff --git a/Lib/test/test_cl.py b/Lib/test/test_cl.py
index 60fbc43..26c5146 100755
--- a/Lib/test/test_cl.py
+++ b/Lib/test/test_cl.py
@@ -63,7 +63,7 @@
 'YUV422DC', 'YUV422HC', '__doc__', '__name__', 'cvt_type', 'error']
 
 
-# This is a very inobstrusive test for the existance of the cl
+# This is a very inobtrusive test for the existence of the cl
 # module and all it's attributes.
 
 def main():
diff --git a/Lib/test/test_pwd.py b/Lib/test/test_pwd.py
index 79bf866..edd40f4 100644
--- a/Lib/test/test_pwd.py
+++ b/Lib/test/test_pwd.py
@@ -59,7 +59,7 @@
 else:
     print 'fakename', fakename, 'did not except pwd.getpwnam()'
 
-# Choose a non-existant uid.
+# Choose a non-existent uid.
 fakeuid = 4127
 while byuids.has_key(fakeuid):
     fakeuid = (fakeuid * 3) % 0x10000
diff --git a/Lib/test/test_winreg.py b/Lib/test/test_winreg.py
index 1af095a..5eb2986 100644
--- a/Lib/test/test_winreg.py
+++ b/Lib/test/test_winreg.py
@@ -115,7 +115,7 @@
     # Opening should now fail!
     try:
         key = OpenKey(root_key, test_key_name)
-        assert 0, "Could open the non-existant key"
+        assert 0, "Could open the non-existent key"
     except WindowsError: # Use this error name this time
         pass
 
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index ccfbc7d..d22a2cc 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -11,7 +11,7 @@
 buf = file.read() * 8
 file.close()
 
-# test the chucksums (hex so the test doesn't break on 64-bit machines)
+# test the checksums (hex so the test doesn't break on 64-bit machines)
 print hex(zlib.crc32('penguin')), hex(zlib.crc32('penguin', 1))
 print hex(zlib.adler32('penguin')), hex(zlib.adler32('penguin', 1))