The usual
diff --git a/Lib/dos-8x3/test_exc.py b/Lib/dos-8x3/test_exc.py
index 7bc515c..7ee203c 100755
--- a/Lib/dos-8x3/test_exc.py
+++ b/Lib/dos-8x3/test_exc.py
@@ -19,7 +19,7 @@
 
 def r(thing):
     test_raise_catch(thing)
-    if type(thing) == ClassType:
+    if isinstance(thing, ClassType):
         print thing.__name__
     else:
         print thing
@@ -86,6 +86,14 @@
 try: exec '/\n'
 except SyntaxError: pass
 
+r(IndentationError)
+
+r(TabError)
+# can only be tested under -tt, and is the only test for -tt
+#try: compile("try:\n\t1/0\n    \t1/0\nfinally:\n pass\n", '<string>', 'exec')
+#except TabError: pass
+#else: raise TestFailed
+
 r(SystemError)
 print '(hard to reproduce)'