diff --git a/.jenkins.d/30-unit-tests.sh b/.jenkins.d/30-unit-tests.sh
index 4109bd5..b05ec4a 100755
--- a/.jenkins.d/30-unit-tests.sh
+++ b/.jenkins.d/30-unit-tests.sh
@@ -2,4 +2,15 @@
 set -x
 set -e
 
+# Prepare environment
+sudo rm -Rf ~/.ndn
+
+IS_OSX=$( python -c "print 'yes' if 'OSX' in '$NODE_LABELS'.strip().split(' ') else 'no'" )
+IS_LINUX=$( python -c "print 'yes' if 'Linux' in '$NODE_LABELS'.strip().split(' ') else 'no'" )
+
+if [ $IS_OSX = "yes" ]; then
+    security unlock-keychain -p "named-data"
+fi
+
+# Run unit tests
 ./build/unit-tests -l test_suite