diff --git a/app.py b/app.py
index b23d8f2..5171de7 100644
--- a/app.py
+++ b/app.py
@@ -484,12 +484,6 @@ def _analyze_emby_sharing(series: list[dict], step_seconds: int) -> dict:
     }
 
 
-def _emby_history_step(days: int) -> int:
-    """Keep query_range below Prometheus' 11,000-points-per-series limit."""
-    duration_seconds = days * 86400
-    return max(60, math.ceil((duration_seconds / 10_500) / 60) * 60)
-
-
 async def _fetch_emby_session_history(days: int, server: str) -> tuple[list[dict], int]:
     cfg = SERVICES.get("grafana")
     if not cfg:
@@ -503,43 +497,23 @@ async def _fetch_emby_session_history(days: int, server: str) -> tuple[list[dict
     query = f"max by ({labels}) ({selector})"
     end = int(time.time())
     start = end - days * 86400
-    step = _emby_history_step(days)
+    step = max(60, math.ceil(((end - start) / 30000) / 60) * 60)
     url = f"{request_data['base_url'].rstrip('/')}/api/datasources/proxy/uid/{datasource_uid}/api/v1/query_range"
-    series_by_metric: dict[str, dict] = {}
-    chunk_seconds = 30 * 86400
     try:
         async with httpx.AsyncClient(timeout=90) as client:
-            chunk_start = start
-            while chunk_start < end:
-                chunk_end = min(chunk_start + chunk_seconds, end)
-                response = await client.get(
-                    url,
-                    params={"query": query, "start": chunk_start, "end": chunk_end, "step": step},
-                    headers=request_data["headers"], cookies=request_data["cookies"],
-                )
-                response.raise_for_status()
-                payload = response.json()
-                if payload.get("status") != "success":
-                    raise HTTPException(502, "Prometheus rejected the Emby session history query")
-                for item in payload.get("data", {}).get("result", []):
-                    metric = item.get("metric", {})
-                    key = json.dumps(metric, sort_keys=True, separators=(",", ":"))
-                    merged = series_by_metric.setdefault(key, {"metric": metric, "values": []})
-                    merged["values"].extend(item.get("values", []))
-                chunk_start = chunk_end
+            response = await client.get(
+                url,
+                params={"query": query, "start": start, "end": end, "step": step},
+                headers=request_data["headers"], cookies=request_data["cookies"],
+            )
+        response.raise_for_status()
+        payload = response.json()
     except (httpx.HTTPError, ValueError) as exc:
         log.warning("Emby sharing history query failed: %s", type(exc).__name__)
         raise HTTPException(502, "Emby session history is temporarily unavailable")
-
-    series = []
-    for item in series_by_metric.values():
-        values_by_timestamp = {
-            float(value[0]): value for value in item["values"]
-            if isinstance(value, (list, tuple)) and len(value) >= 2
-        }
-        item["values"] = [values_by_timestamp[ts] for ts in sorted(values_by_timestamp)]
-        series.append(item)
-    return series, step
+    if payload.get("status") != "success":
+        raise HTTPException(502, "Prometheus rejected the Emby session history query")
+    return payload.get("data", {}).get("result", []), step
 
 
 @app.get("/emby/account-sharing")
diff --git a/tests/test_app.py b/tests/test_app.py
index fe4a29b..5c6b2d7 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -216,60 +216,6 @@ def test_emby_account_sharing_endpoint_is_read_only_and_filterable(monkeypatch):
     assert payload["users"][0]["username"] == "Alice"
 
 
-def test_emby_history_step_stays_below_prometheus_resolution_limit():
-    assert app._emby_history_step(7) == 60
-    for days in (7, 30, 90):
-        step = app._emby_history_step(days)
-        assert step % 60 == 0
-        assert (days * 86400) / step <= 10_500
-
-
-def test_emby_history_fetch_chunks_90_days_and_merges_equal_series(monkeypatch):
-    calls = []
-
-    class FakeResponse:
-        def __init__(self, params):
-            self.params = params
-
-        def raise_for_status(self):
-            return None
-
-        def json(self):
-            start = self.params["start"]
-            end = self.params["end"]
-            return {"status": "success", "data": {"result": [{
-                "metric": {"job": "emby-sascha", "username": "Alice", "remoteEndPoint": "8.8.8.8"},
-                "values": [[start, "1"], [end, "1"]],
-            }]}}
-
-    class FakeClient:
-        def __init__(self, **_kwargs):
-            pass
-
-        async def __aenter__(self):
-            return self
-
-        async def __aexit__(self, *_args):
-            return None
-
-        async def get(self, _url, params, headers, cookies):
-            calls.append(params)
-            return FakeResponse(params)
-
-    monkeypatch.setattr(app, "SERVICES", {"grafana": {"url": "http://grafana", "auth": "none"}})
-    monkeypatch.setattr(app.httpx, "AsyncClient", FakeClient)
-    monkeypatch.setattr(app.time, "time", lambda: 10_000_000)
-
-    series, step = asyncio.run(app._fetch_emby_session_history(90, "all"))
-
-    assert len(calls) == 3
-    assert all(call["end"] - call["start"] <= 30 * 86400 for call in calls)
-    assert step == 780
-    assert len(series) == 1
-    timestamps = [value[0] for value in series[0]["values"]]
-    assert timestamps == sorted(set(timestamps))
-
-
 def test_capabilities_is_live_machine_readable_safety_map():
     with TestClient(app.app) as client:
         response = client.get(