The pre module has been gone for a while.  Need to go through and find other modules that no longer exists, since errors are silently ignored.
diff --git a/Lib/test/test___all__.py b/Lib/test/test___all__.py
index 7bf5314..74a9cdf 100644
--- a/Lib/test/test___all__.py
+++ b/Lib/test/test___all__.py
@@ -5,8 +5,6 @@
 import sys
 import warnings
 
-warnings.filterwarnings("ignore", ".* 'pre' .*", DeprecationWarning,
-                        r'pre$')
 warnings.filterwarnings("ignore", ".* regsub .*", DeprecationWarning,
                         r'^regsub$')
 warnings.filterwarnings("ignore",
@@ -122,7 +120,6 @@
         self.check_all("poplib")
         self.check_all("posixpath")
         self.check_all("pprint")
-        self.check_all("pre")  # deprecated
         self.check_all("profile")
         self.check_all("pstats")
         self.check_all("pty")