diff --git a/Libraries/PyKotor/tests/resource/formats/test_mdl_bif_slice_offset.py b/Libraries/PyKotor/tests/resource/formats/test_mdl_bif_slice_offset.py
new file mode 100644
index 000000000..e1fdd2fcd
--- /dev/null
+++ b/Libraries/PyKotor/tests/resource/formats/test_mdl_bif_slice_offset.py
@@ -0,0 +1,39 @@
+"""Regression: binary MDL read from a non-zero slice (BIF / chitin-style offset).
+
+``MDLBinaryReader`` must open the stream at ``offset + 12`` (geometry base) without
+an extra ``set_offset(+12)``, which double-counted ``offset`` and broke BIF-sourced MDLs.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from pykotor.resource.formats.mdl import read_mdl
+
+
+def _smallest_mdl_fixture() -> Path:
+    candidates = (
+        Path(__file__).resolve().parent.parent.parent / "test_files" / "mdl" / "m12aa_c04_cam.mdl",
+        Path("Libraries/PyKotor/tests/test_files/mdl/m12aa_c04_cam.mdl"),
+        Path("tests/test_files/mdl/m12aa_c04_cam.mdl"),
+    )
+    for path in candidates:
+        if path.is_file():
+            return path
+    pytest.skip("MDL fixture m12aa_c04_cam.mdl not found")
+
+
+def test_read_mdl_nonzero_slice_offset_matches_standalone_file() -> None:
+    """Padded buffer + offset/size must parse identically to reading the file directly."""
+    mdl_path = _smallest_mdl_fixture()
+    raw = mdl_path.read_bytes()
+    prefix = b"BIFSLICE" * 64  # arbitrary non-MDL padding before the resource
+    composite = prefix + raw
+
+    direct = read_mdl(mdl_path)
+    sliced = read_mdl(composite, offset=len(prefix), size=len(raw))
+
+    assert sliced.name == direct.name
+    assert len(sliced.all_nodes()) == len(direct.all_nodes())
diff --git a/Libraries/PyKotor/tests/test_resource_json_progress_regressions.py b/Libraries/PyKotor/tests/test_resource_json_progress_regressions.py
new file mode 100644
index 000000000..7a0e25200
--- /dev/null
+++ b/Libraries/PyKotor/tests/test_resource_json_progress_regressions.py
@@ -0,0 +1,45 @@
+"""Regression tests for JSON export progress behavior in automation (CI)."""
+
+from __future__ import annotations
+
+import io
+
+import pytest
+
+from pykotor.tools.resource_json import _supports_live_progress
+
+
+class _FakeTTYStream(io.StringIO):
+    """stderr-like stream that claims to be a TTY (common in some CI runners)."""
+
+    def isatty(self) -> bool:
+        return True
+
+
+def test_supports_live_progress_honors_tty_when_not_ci(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.delenv("CI", raising=False)
+    monkeypatch.delenv("GITHUB_ACTIONS", raising=False)
+    assert _supports_live_progress(_FakeTTYStream()) is True
+
+
+def test_supports_live_progress_ci_env_disables_even_if_stream_is_tty(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setenv("CI", "true")
+    assert _supports_live_progress(_FakeTTYStream()) is False
+
+
+def test_supports_live_progress_github_actions_env_disables(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.delenv("CI", raising=False)
+    monkeypatch.setenv("GITHUB_ACTIONS", "1")
+    assert _supports_live_progress(_FakeTTYStream()) is False
+
+
+def test_supports_live_progress_non_tty_false_regardless_of_ci(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.delenv("CI", raising=False)
+    monkeypatch.delenv("GITHUB_ACTIONS", raising=False)
+    assert _supports_live_progress(io.StringIO()) is False