Got rid of special case for Macintosh realloc slowdown: Tim fixed the problem.
diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py
index dea0c35..1ddd13e 100644
--- a/Lib/test/test_import.py
+++ b/Lib/test/test_import.py
@@ -107,5 +107,4 @@
         if os.path.exists(fname):
             os.unlink(fname)
 
-if sys.platform != 'mac':
-    test_module_with_large_stack('longlist')
+test_module_with_large_stack('longlist')
diff --git a/Lib/test/test_longexp.py b/Lib/test/test_longexp.py
index b7842f9..d65e72a 100644
--- a/Lib/test/test_longexp.py
+++ b/Lib/test/test_longexp.py
@@ -5,10 +5,6 @@
 
 REPS = 65580
 
-if sys.platform == 'mac':
-    import gestalt
-    if gestalt.gestalt('sysv') > 0x9ff:
-        raise TestSkipped, 'Triggers pathological malloc slowdown on OSX MacPython'
 if sys.platform == "os2emx":
     raise TestFailed, "OS/2+EMX port has malloc problems with long expressions"
 else: