=== modified file 'dulwich/tests/test_porcelain.py'
Index: dulwich/dulwich/tests/test_porcelain.py
===================================================================
--- dulwich.orig/dulwich/tests/test_porcelain.py
+++ dulwich/dulwich/tests/test_porcelain.py
@@ -1324,6 +1324,9 @@ class PushTests(PorcelainTestCase):
         clone the remote, commit a file to the clone, then push the changes
         back to the remote.
         """
+        self.skipTest(
+            'test is flappy - '
+            'see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913037')
         outstream = BytesIO()
         errstream = BytesIO()