diff --git a/litellm/proxy/spend_tracking/spend_log_api_key_scope.py b/litellm/proxy/spend_tracking/spend_log_api_key_scope.py
index 6507011a977..8b5c899553a 100644
--- a/litellm/proxy/spend_tracking/spend_log_api_key_scope.py
+++ b/litellm/proxy/spend_tracking/spend_log_api_key_scope.py
@@ -47,7 +47,9 @@ _API_KEY_ROWS: Final = TypeAdapter(tuple[_ApiKeyRow, ...])
 def _narrowing_keys(rows: Sequence[Mapping[str, object]]) -> tuple[str, ...] | None:
     """None when the list cannot narrow the read: nothing known about the owner, or too many keys to help."""
     keys: Final = tuple(row.api_key for row in _API_KEY_ROWS.validate_python(rows))
-    return None if not keys or len(keys) > SPEND_LOG_API_KEY_SCOPE_MAX_KEYS else keys
+    if not keys or len(keys) > SPEND_LOG_API_KEY_SCOPE_MAX_KEYS:
+        return None
+    return keys if "" in keys else (*keys, "")
 
 
 def _daily_dates_around(start: date, end: date) -> tuple[str, str]:
diff --git a/tests/unit/proxy/management_endpoints/test_team_endpoints.py b/tests/unit/proxy/management_endpoints/test_team_endpoints.py
index ac46ccc1cfc..29e9be69776 100644
--- a/tests/unit/proxy/management_endpoints/test_team_endpoints.py
+++ b/tests/unit/proxy/management_endpoints/test_team_endpoints.py
@@ -17400,7 +17400,7 @@ async def test_get_team_spend_by_user_admin_groups_spend_logs_by_team_and_user(m
     assert any("statement_timeout = 30000" in statement for statement in transaction.statements)
     mock_db_client.db.tx.assert_not_called()
     sql, *params = transaction.query_raw.call_args.args
-    assert params == ["2026-09-01", "2026-09-04", "team-alpha", "team-beta", ["sk-alpha", "sk-beta"]]
+    assert params == ["2026-09-01", "2026-09-04", "team-alpha", "team-beta", ["sk-alpha", "sk-beta", ""]]
     assert 'FROM "LiteLLM_SpendLogs" sl' in sql
     assert 'sl."startTime" >= $1::timestamp' in sql
     assert "sl.\"startTime\" < $2::timestamp + INTERVAL '1 day'" in sql
@@ -17440,7 +17440,7 @@ async def test_get_team_spend_by_user_team_admin_sees_every_member(mock_db_clien
     )
 
     sql, *params = transaction.query_raw.call_args.args
-    assert params == ["2026-09-01", "2026-09-04", "team-alpha", ["sk-alpha"]]
+    assert params == ["2026-09-01", "2026-09-04", "team-alpha", ["sk-alpha", ""]]
     assert 'sl."user" = $' not in sql
     assert "sl.api_key = ANY($4::text[])" in sql
 
@@ -17465,7 +17465,7 @@ async def test_get_team_spend_by_user_plain_member_only_sees_own_row(mock_db_cli
     )
 
     sql, *params = transaction.query_raw.call_args.args
-    assert params == ["2026-09-01", "2026-09-04", "team-alpha", "bob", ["sk-bob"]]
+    assert params == ["2026-09-01", "2026-09-04", "team-alpha", "bob", ["sk-bob", ""]]
     assert "sl.team_id IN ($3)" in sql
     assert 'AND sl."user" = $4' in sql
     assert "sl.api_key = ANY($5::text[])" in sql
diff --git a/tests/unit/proxy/pass_through_endpoints/test_llm_passthrough_endpoints.py b/tests/unit/proxy/pass_through_endpoints/test_llm_passthrough_endpoints.py
index 60b263948b6..2e196d6a8c2 100644
--- a/tests/unit/proxy/pass_through_endpoints/test_llm_passthrough_endpoints.py
+++ b/tests/unit/proxy/pass_through_endpoints/test_llm_passthrough_endpoints.py
@@ -1,5 +1,3 @@
-import asyncio
-import importlib
 import json
 from collections.abc import Iterator
 from typing import Final
@@ -18,6 +16,9 @@ from litellm.router import Deployment, LiteLLM_Params
 from tests._vcr_conftest_common import install_live_call_probe, record_vcr_outcome
 
 
+pytestmark: Final = pytest.mark.usefixtures("drained_logging_worker")
+
+
 @pytest.fixture
 def isolate_passthrough_endpoint_router_state(monkeypatch: pytest.MonkeyPatch) -> None:
     from litellm.proxy.pass_through_endpoints.llm_passthrough_endpoints import (
@@ -177,28 +178,6 @@ def _vcr_outcome_gate(request, vcr):
     record_vcr_outcome(request, vcr)
 
 
-@pytest.fixture(scope="function", autouse=True)
-def setup_and_teardown():
-    """
-    This fixture reloads litellm before every function. To speed up testing by removing callbacks being chained.
-    """
-    from litellm.litellm_core_utils.logging_worker import GLOBAL_LOGGING_WORKER
-
-    asyncio.run(GLOBAL_LOGGING_WORKER.clear_queue())
-    importlib.reload(litellm)
-    try:
-        if hasattr(litellm, "proxy") and hasattr(litellm.proxy, "proxy_server"):
-            importlib.reload(litellm.proxy.proxy_server)
-    except Exception as e:
-        print(f"Error reloading litellm.proxy.proxy_server: {e}")
-    loop = asyncio.get_event_loop_policy().new_event_loop()
-    asyncio.set_event_loop(loop)
-    print(litellm)
-    yield
-    loop.close()
-    asyncio.set_event_loop(None)
-
-
 @pytest.mark.asyncio
 async def test_gemini_pass_through_endpoint_forwards_key_and_body(
     respx_mock: "respx.MockRouter", httpx_transport: None, monkeypatch: pytest.MonkeyPatch
diff --git a/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py b/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
index 29e2f97d11c..337aa2939dd 100644
--- a/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
+++ b/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
@@ -944,10 +944,49 @@ async def test_ui_view_spend_logs_user_filter_reads_spend_logs_through_the_users
     assert '"LiteLLM_VerificationToken"' in lookup_sql
     assert lookup_params == ("alice", "2026-08-31", "2026-09-04", SPEND_LOG_API_KEY_SCOPE_MAX_KEYS + 1)
     page_sql, _, scoped_api_keys = _spend_logs_page_query(queries)
-    assert scoped_api_keys == ["sk-deleted", "sk-live"]
+    assert scoped_api_keys == ["sk-deleted", "sk-live", ""]
     assert '"user" = $' in page_sql
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize("owner_filter", ["user_id", "team_id"])
+async def test_ui_view_spend_logs_owner_filter_preserves_empty_key_rows(
+    client: TestClient, monkeypatch: pytest.MonkeyPatch, owner_filter: str
+) -> None:
+    logs: Final = [
+        _owned_log("known", "sk-live", "alice", "team-alpha"),
+        _owned_log("unknown-key", "", "alice", "team-alpha"),
+        _owned_log("foreign", "", "bob", "team-beta"),
+    ]
+    monkeypatch.setattr(
+        ps,
+        "prisma_client",
+        make_ui_spend_logs_mock_prisma(
+            logs,
+            _owner_filtered_logs(logs),
+            owner_api_keys_fn=_owner_api_keys(
+                daily_rows={}, live_keys={"alice": {"sk-live"}, "team-alpha": {"sk-live"}}
+            ),
+        ),
+    )
+    monkeypatch.setitem(
+        app.dependency_overrides,
+        ps.user_api_key_auth,
+        lambda: UserAPIKeyAuth(user_role=LitellmUserRoles.PROXY_ADMIN, user_id="admin_user"),
+    )
+    response: Final = client.get(
+        "/spend/logs/ui",
+        params={
+            owner_filter: "alice" if owner_filter == "user_id" else "team-alpha",
+            "start_date": "2026-09-01 00:00:00",
+            "end_date": "2026-09-03 23:59:59",
+        },
+        headers={"Authorization": "Bearer sk-test"},
+    )
+    assert response.status_code == 200, response.text
+    assert {row["request_id"] for row in response.json()["data"]} == {"known", "unknown-key"}
+
+
 @pytest.mark.asyncio
 async def test_ui_view_spend_logs_team_filter_reads_spend_logs_through_the_teams_api_keys(client, monkeypatch):
     logs = [
@@ -989,7 +1028,7 @@ async def test_ui_view_spend_logs_team_filter_reads_spend_logs_through_the_teams
     _, lookup_params = next((sql, params) for sql, params in queries if '"LiteLLM_DailyTeamSpend"' in sql)
     assert lookup_params[:3] == (["team-alpha"], "2026-08-31", "2026-09-04")
     page_sql, _, scoped_api_keys = _spend_logs_page_query(queries)
-    assert scoped_api_keys == ["sk-alpha-1", "sk-alpha-2"]
+    assert scoped_api_keys == ["sk-alpha-1", "sk-alpha-2", ""]
     assert "team_id = $" in page_sql