diff --git a/tests/test-rhg.t b/tests/test-rhg.t
--- a/tests/test-rhg.t
+++ b/tests/test-rhg.t
@@ -10,7 +10,7 @@
   $ rhg root > /dev/full
   abort: No space left on device (os error 28)
   [255]
-  $ rm -rf $PWD
+  $ rm -rf `pwd`
   $ rhg root
   abort: error getting current working directory: $ENOENT$
   [255]