diff --git a/tests/scripts/travis_setup.sh b/tests/scripts/travis_setup.sh
index 104b5c0d..8ccf1ab8 100755
--- a/tests/scripts/travis_setup.sh
+++ b/tests/scripts/travis_setup.sh
@@ -19,8 +19,9 @@ pear channel-discover pear.phpqatools.org
 pear channel-discover pear.netpirates.net
 pear install pear/PHP_CodeSniffer-1.4.8
 pear install pear.phpunit.de/phpcpd
-export PATH="$HOME/.composer/vendor/bin:$PATH" && sed -i '1i export PATH="$HOME/.composer/vendor/bin:$PATH"' $HOME/.bashrc
-composer global require drush/drush:6.x
+export PATH="$HOME/.composer/vendor/bin:$PATH"
+echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' >> $HOME/.bashrc
+composer global require --prefer-source drush/drush:6.x
 phpenv rehash
 drush dl --yes drupal
 cd drupal-*