diff -r fb89cd21a7a0 -r 1782278bab8a tests/run-tests.py
--- a/tests/run-tests.py	Thu Apr 15 18:08:48 2010 +0200
+++ b/tests/run-tests.py	Thu Apr 15 20:25:07 2010 +0200
@@ -848,6 +848,8 @@
     # unset env related to hooks
     for k in os.environ.keys():
         if k.startswith('HG_'):
+            # can't remove on solaris
+            os.environ[k] = ''
             del os.environ[k]
 
     global TESTDIR, HGTMP, INST, BINDIR, PYTHONDIR, COVERAGE_FILE