diff --git a/nailgun/nailgun/objects/cluster.py b/nailgun/nailgun/objects/cluster.py
index 5874a4c935..e181a7c93e 100644
--- a/nailgun/nailgun/objects/cluster.py
+++ b/nailgun/nailgun/objects/cluster.py
@@ -47,6 +47,7 @@ from nailgun.policy.merge import NetworkRoleMergePolicy
 from nailgun.settings import settings
 from nailgun.utils import AttributesGenerator
 from nailgun.utils import dict_merge
+from nailgun.utils import text_format_safe
 from nailgun.utils import traverse
 
 
@@ -363,6 +364,7 @@ class Cluster(NailgunObject):
 
         plugin_attrs = traverse(
             plugin_attrs,
+            formatter=text_format_safe,
             formatter_context={'cluster': instance, 'settings': settings},
             keywords={'generator': AttributesGenerator.evaluate}
         )
diff --git a/nailgun/nailgun/test/unit/test_objects.py b/nailgun/nailgun/test/unit/test_objects.py
index 0c00ffe21c..17861b8379 100644
--- a/nailgun/nailgun/test/unit/test_objects.py
+++ b/nailgun/nailgun/test/unit/test_objects.py
@@ -1679,6 +1679,20 @@ class TestClusterObject(BaseTestCase):
             updated_attributes['editable']['test_plugin']
                               ['plugin_name_text']['value'])
 
+    def test_get_attributes_with_plugin(self):
+        cluster = self.env.create_cluster(api=False)
+        self.env.create_plugin(
+            name='test_plugin',
+            version='1.0.0',
+            package_version='4.0.0',
+            cluster=cluster,
+            attributes_metadata=self.env.get_default_plugin_env_config(
+                value='{}')
+        )
+        attr = objects.Cluster.get_attributes(cluster, True)
+        plugin_attrs = attr.editable['test_plugin']['metadata']['versions'][0]
+        self.assertEqual('{}', plugin_attrs['plugin_name_text']['value'])
+
 
 class TestClusterObjectVirtRoles(BaseTestCase):