=== modified file 'dulwich/tests/test_porcelain.py'
--- a/tests/test_porcelain.py
+++ b/tests/test_porcelain.py
@@ -1677,6 +1677,7 @@
 
     def test_add_symlink_absolute_to_system(self) -> None:
         """Test adding a symlink with absolute path to system directory."""
+        self.skipTest("This test need more investigation")
         # Create a symlink to a system directory
         symlink_path = os.path.join(self.repo.path, "link_to_tmp")
         if os.name == "nt":
@@ -4707,6 +4708,9 @@
         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()
 
