diff --git a/Lib/test/test_exceptions.py b/Lib/test/test_exceptions.py
index 619b7e3..41b9413 100644
--- a/Lib/test/test_exceptions.py
+++ b/Lib/test/test_exceptions.py
@@ -80,10 +80,10 @@
         self.raise_catch(IndentationError, "IndentationError")
 
         self.raise_catch(TabError, "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: self.fail("TabError not raised")
+        try: compile("try:\n\t1/0\n    \t1/0\nfinally:\n pass\n",
+                     '<string>', 'exec')
+        except TabError: pass
+        else: self.fail("TabError not raised")
 
         self.raise_catch(SystemError, "SystemError")