diff --git a/backend/tests/test_liveuamap_resilience.py b/backend/tests/test_liveuamap_resilience.py
new file mode 100644
index 0000000..47a4ad6
--- /dev/null
+++ b/backend/tests/test_liveuamap_resilience.py
@@ -0,0 +1,109 @@
+"""Regression coverage for LiveUAMap packaging and parser drift (#516/#517)."""
+from __future__ import annotations
+
+import base64
+import json
+from pathlib import Path
+
+from services import liveuamap_scraper as scraper
+
+
+def _marker(marker_id: int = 123) -> dict:
+    return {
+        "id": marker_id,
+        "s": "Test incident",
+        "d": "Description",
+        "lat": 38.9,
+        "lng": -77.0,
+        "time": 1_700_000_000,
+        "link": "/en/123-test-incident",
+    }
+
+
+def test_ovens_normalizer_accepts_plain_marker_array() -> None:
+    markers = scraper._normalize_ovens_payload([_marker()])
+    assert markers == [_marker()]
+
+
+def test_ovens_normalizer_accepts_json_encoded_marker_array() -> None:
+    payload = json.dumps([_marker()])
+    markers = scraper._normalize_ovens_payload(payload)
+    assert markers == [_marker()]
+
+
+def test_ovens_normalizer_accepts_double_encoded_marker_array() -> None:
+    payload = json.dumps(json.dumps([_marker()]))
+    markers = scraper._normalize_ovens_payload(payload)
+    assert markers == [_marker()]
+
+
+def test_ovens_normalizer_accepts_marker_strings_inside_array() -> None:
+    payload = [json.dumps(_marker(1)), json.dumps(_marker(2))]
+    markers = scraper._normalize_ovens_payload(payload)
+    assert [item["id"] for item in markers] == [1, 2]
+
+
+def test_ovens_normalizer_accepts_keyed_marker_object() -> None:
+    payload = {"1": _marker(1), "2": _marker(2)}
+    markers = scraper._normalize_ovens_payload(payload)
+    assert [item["id"] for item in markers] == [1, 2]
+
+
+def test_ovens_normalizer_accepts_common_wrapper_object() -> None:
+    payload = {"data": {"markers": [_marker()]}}
+    markers = scraper._normalize_ovens_payload(payload)
+    assert markers == [_marker()]
+
+
+def test_ovens_normalizer_accepts_urlquoted_base64_json() -> None:
+    encoded = base64.b64encode(json.dumps([_marker()]).encode()).decode()
+    markers = scraper._normalize_ovens_payload(encoded)
+    assert markers == [_marker()]
+
+
+def test_ovens_normalizer_skips_malformed_entries_without_losing_good_markers() -> None:
+    payload = [_marker(1), "not-json", 17, None, {"junk": "value"}, _marker(2)]
+    markers = scraper._normalize_ovens_payload(payload)
+    assert [item["id"] for item in markers] == [1, 2]
+
+
+def test_geojson_feature_collection_is_normalized() -> None:
+    payload = {
+        "type": "FeatureCollection",
+        "features": [
+            {
+                "type": "Feature",
+                "geometry": {"type": "Point", "coordinates": [-77.0, 38.9]},
+                "properties": {"id": 7, "title": "GeoJSON incident"},
+            }
+        ],
+    }
+    markers = scraper._normalize_ovens_payload(payload)
+    assert markers[0]["id"] == 7
+    assert markers[0]["lat"] == 38.9
+    assert markers[0]["lng"] == -77.0
+
+
+def test_marker_conversion_rejects_non_mapping_instead_of_calling_get() -> None:
+    assert scraper._marker_to_incident("bad", {"name": "Ukraine", "url": "https://liveuamap.com"}) is None
+
+
+def test_marker_conversion_preserves_existing_shadowbroker_shape() -> None:
+    incident = scraper._marker_to_incident(
+        _marker(), {"name": "Ukraine", "url": "https://liveuamap.com"}
+    )
+    assert incident is not None
+    assert incident["id"] == 123
+    assert incident["type"] == "liveuamap"
+    assert incident["title"] == "Test incident"
+    assert incident["lat"] == 38.9
+    assert incident["lng"] == -77.0
+    assert incident["link"] == "https://liveuamap.com/en/123-test-incident"
+
+
+def test_dockerfile_uses_shared_playwright_browser_path_and_runtime_verification() -> None:
+    dockerfile = Path(__file__).resolve().parents[1] / "Dockerfile"
+    text = dockerfile.read_text(encoding="utf-8")
+    assert "PLAYWRIGHT_BROWSERS_PATH=/ms-playwright" in text
+    assert "chromium.executable_path" in text
+    assert "assert path.is_file()" in text