diff --git a/readthedocs/vcs_support/backends/git.py b/readthedocs/vcs_support/backends/git.py
index b9098ebf9c3..d3ac9ab643c 100644
--- a/readthedocs/vcs_support/backends/git.py
+++ b/readthedocs/vcs_support/backends/git.py
@@ -98,7 +98,8 @@ def tags(self):
         # of annotated tags pointing to tagged commits.
         retcode, stdout, _ = self.run(
             'git', 'for-each-ref',
-            '--format="%(if)%(*objectname)%(then)%(*objectname)%(else)%(objectname)%(end) %(refname)"',
+            '--format="%(if)%(*objectname)%(then)%(*objectname)'
+            '%(else)%(objectname)%(end) %(refname)"',
             'refs/tags')
         # error (or no tags found)
         if retcode != 0: