diff --git a/src/borg/testsuite/archiver/create_cmd_test.py b/src/borg/testsuite/archiver/create_cmd_test.py
index 82b515e59..5b55fda11 100644
--- a/src/borg/testsuite/archiver/create_cmd_test.py
+++ b/src/borg/testsuite/archiver/create_cmd_test.py
@@ -1065,3 +1065,28 @@ def test_create_with_compression_algorithms(archivers, request):
     for i in range(count):
         os.unlink(os.path.join(archiver.input_path, f"zeros_{i}"))
         os.unlink(os.path.join(archiver.input_path, f"random_{i}"))
+
+
+def test_exclude_nodump_dir_with_file(archivers, request):
+    """A directory flagged NODUMP and its contents must not be archived."""
+    archiver = request.getfixturevalue(archivers)
+    if not has_lchflags:
+        pytest.skip("platform does not support setting UF_NODUMP")
+
+    # Prepare input tree: input/nd (NODUMP) containing a file.
+    ndir = os.path.join(archiver.input_path, "nd")
+    os.mkdir(ndir)
+    with open(os.path.join(ndir, "file_in_ndir"), "wb") as f:
+        f.write(b"hello")
+
+    # Set NODUMP flag on the directory (Linux: chattr +d, BSD: chflags nodump)
+    platform.set_flags(ndir, stat.UF_NODUMP)
+
+    # Create repo and archive
+    cmd(archiver, "repo-create", RK_ENCRYPTION)
+    cmd(archiver, "create", "test", "input")
+
+    # Verify: neither the directory nor its contained file are present in the archive
+    list_output = cmd(archiver, "list", "test", "--short")
+    assert "input/nd\n" not in list_output
+    assert "input/nd/file_in_ndir\n" not in list_output