diff --git a/jenkins/__init__.py b/jenkins/__init__.py
index cd14a03..0a178ce 100755
--- a/jenkins/__init__.py
+++ b/jenkins/__init__.py
@@ -1294,10 +1294,16 @@ class Jenkins(object):
             Plugin:mailer, Plugin:jquery, Plugin:antisamy-markup-formatter,
             Plugin:maven-plugin, Plugin:pam-auth]'
         '''
-        return self.jenkins_open(
-            requests.Request(
-                'POST', self._build_url(SCRIPT_TEXT),
-                data="script=".encode('utf-8') + quote(script).encode('utf-8')))
+        magic_str = ')]}.'
+        print_magic_str = 'println()\nprint("{}")'.format(magic_str)
+        groovy = {'script': script.encode('utf-8') + print_magic_str.encode('utf-8')}
+        result = self.jenkins_open(requests.Request(
+            'POST', self._build_url(SCRIPT_TEXT), data=groovy))
+
+        if not result.endswith(magic_str):
+            raise JenkinsException(result)
+
+        return result[:result.rfind('\n')]
 
     def install_plugin(self, name, include_dependencies=True):
         '''Install a plugin and its dependencies from the Jenkins public
diff --git a/tests/test_script.py b/tests/test_script.py
index c73bcd6..ce8e718 100644
--- a/tests/test_script.py
+++ b/tests/test_script.py
@@ -1,5 +1,4 @@
 from mock import patch
-from six.moves.urllib.parse import quote
 
 import jenkins
 from tests.base import JenkinsTestBase
@@ -23,7 +22,6 @@ class JenkinsScriptTest(JenkinsTestBase):
         self.assertEqual(
             jenkins_mock.call_args[0][0].url,
             self.make_url('scriptText'))
-        self.assertIn(quote('&&'), jenkins_mock.call_args[0][0].data.decode('utf8'))
         self._check_requests(jenkins_mock.call_args_list)
 
     @patch.object(jenkins.Jenkins, 'jenkins_open')