diff --git a/tabvision/tests/integration/test_composite_eval_smoke.py b/tabvision/tests/integration/test_composite_eval_smoke.py
index a036b8c..3980944 100644
--- a/tabvision/tests/integration/test_composite_eval_smoke.py
+++ b/tabvision/tests/integration/test_composite_eval_smoke.py
@@ -64,7 +64,8 @@ def _write_manifest(
     for entry in entries:
         lines.append("[[clips]]")
         for key, value in entry.items():
-            lines.append(f'{key} = "{value}"')
+            escaped = value.replace("\\", "\\\\").replace('"', '\\"')
+            lines.append(f'{key} = "{escaped}"')
         lines.append("")
     manifest_path.write_text("\n".join(lines), encoding="utf-8")
 
diff --git a/tabvision/tests/unit/test_yolo_backend.py b/tabvision/tests/unit/test_yolo_backend.py
index b6b6e01..e20157b 100644
--- a/tabvision/tests/unit/test_yolo_backend.py
+++ b/tabvision/tests/unit/test_yolo_backend.py
@@ -35,7 +35,7 @@ def test_default_checkpoint_path_uses_data_root(monkeypatch):
     monkeypatch.setenv("TABVISION_DATA_ROOT", "/tmp/tv-test-root")
     monkeypatch.delenv(DEFAULT_CHECKPOINT_ENV, raising=False)
     p = _default_checkpoint_path()
-    assert str(p).endswith("/tmp/tv-test-root/models/guitar-yolo-obb-finetuned.pt")
+    assert p.as_posix().endswith("/tmp/tv-test-root/models/guitar-yolo-obb-finetuned.pt")
 
 
 def test_env_overrides_default_checkpoint(monkeypatch, tmp_path):