diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index dc7e2006..14b71664 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -2,6 +2,7 @@
 
 SCRIPT_DIR=`dirname $0`
 ROOT_DIR=`cd $SCRIPT_DIR/.. && pwd`
+cd $ROOT_DIR
 
 ENVSPEC=`stat -c %Y $ROOT_DIR/tests/environment.pip`
 ENVTIME=`test -d $ROOT_DIR/.ve && stat -c %Y $ROOT_DIR/.ve`