diff --git a/tripleo_repos/main.py b/tripleo_repos/main.py
index ecaedba..1ed8ef4 100755
--- a/tripleo_repos/main.py
+++ b/tripleo_repos/main.py
@@ -228,8 +228,9 @@ def _remove_existing(args):
 
 def _get_base_path(args):
     if args.branch != 'master':
-        if args.distro not in ['centos7']:
-            raise InvalidArguments('Branches only suppported with centos7')
+        if args.distro in ['fedora28'] and args.branch != 'stein':
+            raise InvalidArguments('Only stable/stein branch is suppported '
+                                   'with fedora28.')
         distro_branch = '%s-%s' % (args.distro, args.branch)
     else:
         distro_branch = args.distro
diff --git a/tripleo_repos/tests/test_main.py b/tripleo_repos/tests/test_main.py
index 8ea7df4..161bcbf 100644
--- a/tripleo_repos/tests/test_main.py
+++ b/tripleo_repos/tests/test_main.py
@@ -130,12 +130,20 @@ class TestTripleORepos(testtools.TestCase):
         path = main._get_base_path(args)
         self.assertEqual('http://trunk.rdoproject.org/fedora/', path)
 
-    def test_get_base_path_fedora_branch(self):
+    def test_get_base_path_fedora_unsup_branch(self):
         args = mock.Mock()
         args.branch = 'rocky'
-        args.distro = 'fedora'
+        args.distro = 'fedora28'
         self.assertRaises(main.InvalidArguments, main._get_base_path, args)
 
+    def test_get_base_path_fedora_sup_branch(self):
+        args = mock.Mock()
+        args.branch = 'stein'
+        args.distro = 'fedora28'
+        args.rdo_mirror = 'http://trunk.rdoproject.org'
+        path = main._get_base_path(args)
+        self.assertEqual('http://trunk.rdoproject.org/fedora28-stein/', path)
+
     @mock.patch('subprocess.check_call')
     def test_install_priorities(self, mock_check_call):
         main._install_priorities()