diff -r 81eee5786174 -r d7b0e81b84c2 tests/run-tests.py
--- a/tests/run-tests.py	Sun Feb 07 16:00:05 2016 +0900
+++ b/tests/run-tests.py	Sun Feb 07 16:02:41 2016 +0900
@@ -1936,8 +1936,7 @@
             self._pythondir = self._bindir
         else:
             self._installdir = os.path.join(self._hgtmp, b"install")
-            self._bindir = osenvironb[b"BINDIR"] = \
-                os.path.join(self._installdir, b"bin")
+            self._bindir = os.path.join(self._installdir, b"bin")
             self._tmpbindir = self._bindir
             self._pythondir = os.path.join(self._installdir, b"lib", b"python")