diff -r f103c0693fbb -r c8f3a433abe6 tests/run-tests.py
--- a/tests/run-tests.py	Fri Nov 01 17:14:49 2013 +0000
+++ b/tests/run-tests.py	Sun Nov 17 17:30:23 2013 +0000
@@ -103,6 +103,7 @@
 
 requiredtools = [os.path.basename(sys.executable), "diff", "grep", "unzip",
                  "gunzip", "bunzip2", "sed"]
+createdfiles = []
 
 defaults = {
     'jobs': ('HGTEST_JOBS', 1),
@@ -420,6 +421,11 @@
     if not options.keep_tmpdir:
         vlog("# Cleaning up HGTMP", HGTMP)
         shutil.rmtree(HGTMP, True)
+        for f in createdfiles:
+            try:
+                os.remove(f)
+            except OSError:
+                pass
 
 def usecorrectpython():
     # some tests run python interpreter. they must use same
@@ -439,6 +445,7 @@
         if findprogram(pyexename) != sys.executable:
             try:
                 os.symlink(sys.executable, mypython)
+                createdfiles.append(mypython)
             except OSError, err:
                 # child processes may race, which is harmless
                 if err.errno != errno.EEXIST:
@@ -498,18 +505,6 @@
 
     usecorrectpython()
 
-    vlog("# Installing dummy diffstat")
-    f = open(os.path.join(BINDIR, 'diffstat'), 'w')
-    f.write('#!' + sys.executable + '\n'
-            'import sys\n'
-            'files = 0\n'
-            'for line in sys.stdin:\n'
-            '    if line.startswith("diff "):\n'
-            '        files += 1\n'
-            'sys.stdout.write("files patched: %d\\n" % files)\n')
-    f.close()
-    os.chmod(os.path.join(BINDIR, 'diffstat'), 0700)
-
     if options.py3k_warnings and not options.anycoverage:
         vlog("# Updating hg command to enable Py3k Warnings switch")
         f = open(os.path.join(BINDIR, 'hg'), 'r')