--- a/tests/run-tests.py	Tue May 06 12:47:59 2014 -0500
+++ b/tests/run-tests.py	Fri May 02 18:25:23 2014 +0900
@@ -101,6 +101,8 @@
 if 'java' in sys.platform:
     IMPL_PATH = 'JYTHONPATH'
 
+TESTDIR = HGTMP = INST = BINDIR = TMPBINDIR = PYTHONDIR = None
+
 requiredtools = [os.path.basename(sys.executable), "diff", "grep", "unzip",
                  "gunzip", "bunzip2", "sed"]
 createdfiles = []