Do not chdir when running test_xml_etree, and enhance the findfile helper.
diff --git a/Lib/test/test_sax.py b/Lib/test/test_sax.py
index 22048e6..df7daf1 100644
--- a/Lib/test/test_sax.py
+++ b/Lib/test/test_sax.py
@@ -15,10 +15,9 @@
from cStringIO import StringIO
from test.test_support import findfile, run_unittest
import unittest
-import os
-TEST_XMLFILE = findfile(os.path.join("xmltestdata", "test.xml"))
-TEST_XMLFILE_OUT = findfile(os.path.join("xmltestdata", "test.xml.out"))
+TEST_XMLFILE = findfile("test.xml", subdir="xmltestdata")
+TEST_XMLFILE_OUT = findfile("test.xml.out", subdir="xmltestdata")
ns_uri = "http://www.python.org/xml-ns/saxtest/"