From 0f73c0a7255642b59dc4ab867b50c1080829dcb3 Mon Sep 17 00:00:00 2001
From: skshetry <18718008+skshetry@users.noreply.github.com>
Date: Thu, 8 Jan 2026 21:14:22 +0545
Subject: [PATCH] tests: add a regression test for #10959 (#10960)

---
 pyproject.toml                 |  2 +-
 tests/func/test_data_status.py | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 6b4ee30d8..80db4365f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ dependencies = [
     "distro>=1.3",
     "dpath<3,>=2.1.0",
     "dulwich",
-    "dvc-data>=3.18.0,<3.19.0",
+    "dvc-data>=3.18.1,<3.19.0",
     "dvc-http>=2.29.0",
     "dvc-objects",
     "dvc-render>=1.0.1,<2",
diff --git a/tests/func/test_data_status.py b/tests/func/test_data_status.py
index a73ebedc4..a3799ec68 100644
--- a/tests/func/test_data_status.py
+++ b/tests/func/test_data_status.py
@@ -1244,3 +1244,27 @@ def test_shallow_should_iterate_upto_tracked_directory(tmp_dir, dvc, scm, local_
         "committed": {"added": M.unordered(*files)},
         "git": M.dict(),
     }
+
+
+def test_duplicate_hashes_not_in_remote(tmp_dir, dvc, scm, local_remote):
+    """Test that files with identical content (same hash) are all correctly reported.
+
+    Regression test for https://github.com/iterative/dvc/issues/10959
+    """
+    tmp_dir.dvc_gen(
+        {"foo": "content", "bar": "content", "foobar": "foobar"}, commit="add files"
+    )
+    assert dvc.data_status(not_in_remote=True, granular=True, remote_refresh=True) == {
+        **EMPTY_STATUS,
+        "unchanged": M.unordered("foo", "bar", "foobar"),
+        "not_in_remote": M.unordered("foo", "bar", "foobar"),
+        "git": M.dict(),
+    }
+
+    dvc.push()
+    assert dvc.data_status(not_in_remote=True, granular=True, remote_refresh=True) == {
+        **EMPTY_STATUS,
+        "unchanged": M.unordered("foo", "bar", "foobar"),
+        "not_in_remote": [],
+        "git": M.dict(),
+    }