src/fenris/collect.py

@@ -27,7 +27,7 @@ if VENV_DIR.exists():
         if site_packages:
             sys.path.insert(0, str(site_packages))
 
-from fenris.collector import run_collection
+from fenris.collector import run_collection  # noqa: E402 -- must follow the sys.path bootstrap above
 
 
 CONFIG_PATH = Path("/etc/fenris/fenris.conf")

src/fenris/day_aggregate.py

@@ -9,7 +9,7 @@ usage-habit classification is known rather than unknown (§5.3).
 """
 import sqlite3
 from dataclasses import dataclass
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timedelta
 
 
 @dataclass(frozen=True)

src/fenris/derive.py

@@ -12,7 +12,7 @@ No proportional allocation, endpoint assignment, or double counting.
 """
 import sqlite3
 from datetime import datetime, timedelta, timezone
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional
 
 from .hour_classify import classify_hour, HourSplit
 

src/fenris/init_system.py

@@ -26,7 +26,6 @@ Runit guarantees:
 Spec: §8.4, §8.5, §8.6, §8.7, §8.8, ADR 0008
 """
 import os
-import shutil
 import subprocess
 import sys
 from enum import Enum

src/fenris/legacy.py

@@ -18,11 +18,10 @@ import logging
 import sqlite3
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional
 
 from .hour_classify import classify_hour
-from .segment import open_segment, normalize_identity
+from .segment import open_segment
-from .monitoring_periods import close_period
 
 logger = logging.getLogger(__name__)
 

src/fenris/monitor.py

@@ -31,13 +31,13 @@ if VENV_DIR.exists():
         if site_packages:
             sys.path.insert(0, str(site_packages))
 
-from fenris.store import init_store, get_store_path
+from fenris.store import init_store  # noqa: E402 -- must follow the sys.path bootstrap above
-from fenris.monitoring_periods import (
+from fenris.monitoring_periods import (  # noqa: E402 -- sys.path bootstrap above
     ensure_period_open,
     close_period,
     get_open_period,
 )
-from fenris.init_system import (
+from fenris.init_system import (  # noqa: E402 -- sys.path bootstrap above
     enable_timer,
     disable_timer,
     collect_now,

src/fenris/projection.py

@@ -24,9 +24,9 @@ Criteria: PR-1–PR-17, CI-4.
 """
 import sqlite3
 from dataclasses import dataclass, field
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timedelta
 from enum import Enum
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional
 
 from .monitoring_periods import interval_within_one_monitoring_period
 

src/fenris/repair.py

@@ -13,11 +13,11 @@ Contracts:
 """
 import logging
 import sqlite3
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
 from typing import Optional, List, Tuple
 
-from .derive import find_previous_sample, derive_hours_from_interval, _parse_ts
+from .derive import derive_hours_from_interval, _parse_ts
 
 logger = logging.getLogger(__name__)
 

src/fenris/segment.py

@@ -17,7 +17,6 @@ import sqlite3
 from datetime import datetime
 from typing import Any, Dict, Optional, Tuple
 
-from .collector import normalize_identity
 
 
 def find_current_segment(conn: sqlite3.Connection) -> Optional[Dict[str, Any]]:

src/fenris/status.py

@@ -15,15 +15,14 @@ Criteria: LC-9, CI-2, CI-4, FL-4, FL-5, FL-7.
 """
 import sqlite3
 from contextlib import contextmanager
-import sys
+from datetime import datetime, timezone
-from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from typing import Any, Dict, Iterator, List, Optional, Tuple, TYPE_CHECKING
 
 if TYPE_CHECKING:
     from .status_composition import StatusComposition
 
-from .projection import compute_projection, ConfidenceState, DISCLOSURES
+from .projection import compute_projection, DISCLOSURES
 from .store import SCHEMA_VERSION
 from .init_system import (
     query_service_state as _init_query_service_state,

src/fenris/status_composition.py

@@ -11,25 +11,20 @@ Freshness grading uses shared constants from status.py.
 import enum
 import sqlite3
 from dataclasses import dataclass, field
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timezone
 from typing import Any, Dict, List, Optional
 
-# Status poll interval (AC78-6): lightweight 5s systemctl show poll
-STATUS_POLL_INTERVAL_S = 5
-
 from .status import (
-    FRESH_THRESHOLD_S,
-    STALENESS_THRESHOLD_S,
     grade_freshness,
     freshness_age_human,
     is_deliberately_paused,
     monitoring_continuity,
     deliberate_pause_lines,
-    open_store_readonly,
-    StoreFault,
-    NewerSchema,
 )
 
+# Status poll interval (AC78-6): lightweight 5s systemctl show poll
+STATUS_POLL_INTERVAL_S = 5
+
 
 # ---------------------------------------------------------------------------
 # Status state enum with glyph and label

src/fenris/store.py

@@ -7,7 +7,6 @@ This module handles:
 """
 import sqlite3
 from pathlib import Path
-from typing import Optional
 
 
 # Schema version - increment on each migration

src/fenris/tui.py

@@ -12,7 +12,6 @@ Criteria: TUI-1, TUI-2, TUI-4, CI-1, CI-2, CI-4, IN-3, LC-6, LC-8.
 from __future__ import annotations
 
 import sqlite3
-import sys
 from datetime import date, datetime, timedelta, timezone
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional
@@ -21,7 +20,7 @@ from zoneinfo import ZoneInfo
 from rich.text import Text
 from textual.app import App, ComposeResult
 from textual.binding import Binding
-from textual.containers import Container, Horizontal, VerticalScroll
+from textual.containers import Container, VerticalScroll
 from textual.screen import ModalScreen
 from textual.message import Message
 from textual.widget import Widget
@@ -38,16 +37,14 @@ from .activity_plot import VolumePoint, volume_plot
 from .projection import (
     ConfidenceState,
     ProjectionResult,
-    ScenarioRange,
     compute_projection,
 )
 from .status import (
     CADENCE_DEFAULT_S,
-    FRESH_THRESHOLD_S,
+    FRESH_THRESHOLD_S,  # noqa: F401 -- re-exported; tests/test_acceptance_sweep.py asserts parity with status
-    STALENESS_THRESHOLD_S,
+    STALENESS_THRESHOLD_S,  # noqa: F401 -- re-exported (see above)
     format_disclosures,
-    freshness_age_human,
+    grade_freshness,  # noqa: F401 -- re-exported (see above)
-    grade_freshness,
     deliberate_pause_lines,
     read_status,
     _journalctl_hint,
@@ -55,7 +52,6 @@ from .status import (
 from .status_composition import (
     StatusComposition,
     render_status_tui,
-    STATUS_POLL_INTERVAL_S,
 )
 from .control import MONITOR_HELPER, MonitorError, run_monitor
 from .derive import _parse_ts
@@ -1110,10 +1106,10 @@ def _query_local_day_graph_data(
         (start_text, end_text, selected_date or ""),
     ).fetchall()
     recorded_zones: Dict[str, list[str]] = {}
-    for local_date, timezone in rows:
+    for local_date, zone_name in rows:
         recorded_zones.setdefault(local_date, [])
-        if timezone not in recorded_zones[local_date]:
+        if zone_name not in recorded_zones[local_date]:
-            recorded_zones[local_date].append(timezone)
+            recorded_zones[local_date].append(zone_name)
 
     result: List[Dict[str, Any]] = []
     for local_date in sorted(local_dates):
@@ -1138,9 +1134,9 @@ def _query_local_day_graph_data(
             })
             continue
 
-        for timezone in timezones:
+        for zone_name in timezones:
             summary = query_local_day_summary(
-                conn, local_date, timezone, now,
+                conn, local_date, zone_name, now,
             )
             if summary is None:
                 continue

src/fenris/tz_util.py

@@ -5,7 +5,7 @@ computation used by local-day derivation. All functions are
 stateless and safe to call from the collector and TUI reader.
 """
 import os
-from datetime import datetime, timezone
+from datetime import datetime
 from pathlib import Path
 
 

tests/conftest.py

@@ -1,7 +1,6 @@
 """Shared test helpers for Fenris test suite."""
 from pathlib import Path
 
-import pytest
 
 REPO_ROOT = Path(__file__).resolve().parent.parent
 VERSION_FILE = REPO_ROOT / "pyproject.toml"

tests/test_acceptance_sweep.py

@@ -9,7 +9,6 @@ CI-3  Prohibition set: automated structural checks
 CI-4  Required wording and six disclosures in both views
 """
 import re
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from unittest.mock import patch
@@ -19,16 +18,13 @@ import sys
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.store import init_store, SCHEMA_VERSION
+from fenris.store import init_store
 from fenris.monitoring_periods import ensure_period_open
 from fenris.projection import (
     compute_projection,
     ConfidenceState,
     BaselineTier,
     DISCLOSURES,
-    STALENESS_HOURS,
-    WARMING_MIN_DAYS,
-    YOUNG_REGIME_DAYS,
 )
 from fenris.status import (
     grade_freshness,
@@ -36,13 +32,9 @@ from fenris.status import (
     render_status,
     format_disclosures,
     FRESH_THRESHOLD_S,
-    STALENESS_THRESHOLD_S,
-    CADENCE_DEFAULT_S,
-    ACCURACY_SEC,
 )
 from fenris.tui import (
     FenrisTuiApp,
-    _format_remaining,
 )
 
 

tests/test_collector_history_tracer.py

@@ -8,7 +8,6 @@ Seams:
 - write side: run_collection() → observation store
 - read side: get_status(), compute_projection() → observation store
 """
-import os
 import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
@@ -19,10 +18,9 @@ import sys
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.collector import run_collection, normalize_identity
+from fenris.collector import run_collection
-from fenris.store import init_store, get_store_path, SCHEMA_VERSION
+from fenris.store import init_store, SCHEMA_VERSION
-from fenris.monitoring_periods import ensure_period_open, close_period, get_open_period
+from fenris.monitoring_periods import close_period, get_open_period
-from fenris.day_aggregate import derive_day, derive_all_days
 
 
 # ---------------------------------------------------------------------------
@@ -573,7 +571,6 @@ class TestDisplayStates:
 
     def test_one_sample_awaiting_another_in_tui(self, tmp_path):
         """One sample → TUI shows awaiting state."""
-        from fenris.tui import FenrisTuiApp
         db = tmp_path / "test.db"
         conn = init_store(db)
         conn.execute(

tests/test_collector_tracer.py

@@ -6,13 +6,11 @@ Tests the thinnest complete write path through the system:
 
 Seam: write side of the observation store database file.
 """
-import json
 import os
 import sqlite3
-import tempfile
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, Dict, Generator
+from typing import Any, Dict
 
 import pytest
 
@@ -20,8 +18,8 @@ import pytest
 import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.collector import run_collection, AcquisitionError, InvariantViolationError
+from fenris.collector import run_collection
-from fenris.store import init_store, get_store_path
+from fenris.store import init_store
 
 
 # Fixtures

tests/test_complete_observation_day_gate.py

@@ -13,7 +13,6 @@ Acceptance criteria:
 - Gate-3: Partial days don't satisfy the gate
 - Gate-4: CLI and TUI share the same gate via compute_projection()
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
@@ -24,8 +23,7 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 from fenris.store import init_store
 from fenris.monitoring_periods import ensure_period_open
 from fenris.projection import (
-    compute_projection, ConfidenceState, BaselineTier,
+    compute_projection, ConfidenceState,
-    WARMING_COVERAGE_FLOOR,
 )
 
 

tests/test_cross_day_duplication.py

@@ -6,7 +6,7 @@ shared boundary evidence, not duplicated into both days.
 Seam: derive._add_unattributed_bytes() → day_aggregates.unattributed_bytes_*
 """
 import sqlite3
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timezone
 from pathlib import Path
 
 import pytest
@@ -14,8 +14,6 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.collector import run_collection
-from fenris.store import init_store
-from fenris.monitoring_periods import ensure_period_open
 
 
 def _make_smartctl(duw: int, dur: int):

tests/test_day_aggregates.py

@@ -7,9 +7,8 @@ From spec §5.4, §3.3, ST-4, ST-5:
   whose classification is known
 - No absent hour ever interpolated/estimated/fabricated (FL-3)
 """
-import sqlite3
 import sys
-from datetime import datetime, timezone, timedelta
+from datetime import datetime, timezone
 from pathlib import Path
 
 import pytest
@@ -18,8 +17,8 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.store import init_store
 from fenris.monitoring_periods import ensure_period_open, close_period
-from fenris.day_aggregate import derive_day, derive_all_days, DayAggregate
+from fenris.day_aggregate import derive_day, derive_all_days
-from fenris.hour_classify import HourSplit, ACTIVE_THRESHOLD_BYTES
+from fenris.hour_classify import HourSplit
 
 
 @pytest.fixture

tests/test_hour_classification.py

@@ -11,11 +11,10 @@ Four splits sum to exactly 3600s. Disabled time is never an hour state.
 import sys
 from pathlib import Path
 
-import pytest
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.hour_classify import classify_hour, HourSplit, ACTIVE_THRESHOLD_BYTES
+from fenris.hour_classify import classify_hour, ACTIVE_THRESHOLD_BYTES
 
 HOUR_SECONDS = 3600
 

tests/test_identity_normalization.py

@@ -7,7 +7,6 @@ From spec §2.3:
 
 Padded and unpadded renderings of the same field yield byte-identical stored values.
 """
-import pytest
 import sys
 from pathlib import Path
 

tests/test_init_system.py

@@ -9,12 +9,9 @@ Covers:
 
 Spec: ADR 0008, §8.4, §8.5, §8.6, §8.7, §8.8
 """
-import os
 import sqlite3
-import tempfile
-from datetime import datetime, timedelta, timezone
 from pathlib import Path
-from unittest.mock import patch, MagicMock, PropertyMock
+from unittest.mock import patch, MagicMock
 
 import pytest
 
@@ -24,7 +21,6 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 from fenris.init_system import (
     InitSystem,
     detect_init_system,
-    get_init_system,
     reset_init_system_cache,
     _systemd_enable,
     _systemd_disable,
@@ -41,8 +37,6 @@ from fenris.init_system import (
     collect_now,
     query_service_state,
     journal_hint,
-    FENRIS_SV_DIR,
-    FENRIS_SERVICE_LINK,
     COLLECT_TIMEOUT_S,
 )
 from fenris.store import init_store

tests/test_issue_72_edge_cases.py

@@ -7,11 +7,9 @@ Covers:
 - TPH-#63: Horizon anchoring at evidence endpoint
 - TPH-#64: Burst/habit checks with unknown daily shares
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
-import pytest
 import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
@@ -19,8 +17,8 @@ from fenris.store import init_store
 from fenris.monitoring_periods import ensure_period_open, close_period
 from fenris.derive import derive_hours_from_interval
 from fenris.day_aggregate import derive_day
-from fenris.projection import compute_projection, ConfidenceState, STALENESS_HOURS
+from fenris.projection import compute_projection
-from fenris.tui import _query_live_graph_data, _query_daily_graph_data
+from fenris.tui import _query_live_graph_data
 
 
 # ---------------------------------------------------------------------------

tests/test_issue_77.py

@@ -6,7 +6,6 @@ These tests verify that:
 3. Edge cases like zero-delta intervals and unknown daily shares are handled
 4. qualifying_days_progress shows honest qualifying day count
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
@@ -15,10 +14,9 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.store import init_store
-from fenris.monitoring_periods import ensure_period_open, close_period
+from fenris.monitoring_periods import ensure_period_open
 from fenris.projection import (
-    compute_projection, ConfidenceState, BaselineTier,
+    compute_projection, ConfidenceState,
-    WARMING_MIN_DAYS, WARMING_COVERAGE_FLOOR, WARMING_MAX_LOW_COVERAGE,
 )
 
 

tests/test_issue_79.py

@@ -5,7 +5,6 @@ Covers:
 - TPH-11: Single maker-credit placement, vendor wear under Drive health
 - Preserve: continuity, pause block, quit rail, auth banner
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from unittest.mock import patch
@@ -93,8 +92,8 @@ class TestFenrisIdentity:
             store_path=tmp_path / "nonexistent.db",
             refresh_interval_s=0.2,
         )
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
-            headline = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             assert "🐺 Fenris by Bongbetic" in str(app.query_one("#identity").render())
 
     @pytest.mark.asyncio
@@ -105,8 +104,8 @@ class TestFenrisIdentity:
             refresh_interval_s=0.2,
         )
         # Simulate narrow terminal that can't render wolf
-        async with app.run_test(size=(60, 24)) as pilot:
+        async with app.run_test(size=(60, 24)):
-            headline = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             # Either shows wolf or fallback - both are acceptable
             assert "Fenris by Bongbetic" in str(app.query_one("#identity").render())
 
@@ -117,7 +116,7 @@ class TestFenrisIdentity:
             store_path=tmp_path / "nonexistent.db",
             refresh_interval_s=0.2,
         )
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             headline = str(app.query_one("#headline-band").render())
             # No replacement character (U+FFFD) should appear
             assert "\ufffd" not in headline.lower()
@@ -137,7 +136,7 @@ class TestFenrisIdentity:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             headline = str(app.query_one("#headline-band").render())
             # Identity appears once, lifespan is separate data
             assert "🐺 Fenris by Bongbetic" in str(app.query_one("#identity").render())
@@ -160,7 +159,7 @@ class TestSingleMakerCredit:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             strip = str(app.query_one("#service-strip").render())
             # "by Bongbetic" should NOT appear in service strip
             assert "by Bongbetic" not in strip
@@ -172,15 +171,15 @@ class TestSingleMakerCredit:
             store_path=tmp_path / "nonexistent.db",
             refresh_interval_s=0.2,
         )
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
-            headline = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             assert "Fenris by Bongbetic" in str(app.query_one("#identity").render())
 
     @pytest.mark.asyncio
     async def test_empty_store_no_maker_credit_in_strip(self, tmp_path):
         """Empty store: no maker credit in service strip."""
         app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             strip = str(app.query_one("#service-strip").render())
             assert "by Bongbetic" not in strip
 
@@ -191,7 +190,7 @@ class TestSingleMakerCredit:
         db = tmp_path / "test.db"
         db.write_bytes(b"not a database")
         app = FenrisTuiApp(store_path=db)
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             strip = str(app.query_one("#service-strip").render())
             assert "by Bongbetic" not in strip
 
@@ -212,7 +211,7 @@ class TestDriveHealthVendorWear:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             health = str(app.query_one("#drive-health").render())
             # Vendor wear should be present with health context
             assert "vendor wear" in health.lower()
@@ -243,7 +242,7 @@ class TestDriveHealthVendorWear:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             health = str(app.query_one("#drive-health").render())
             # Should show 0% used or honest zero, not crash
             assert "vendor wear" in health.lower()
@@ -265,7 +264,7 @@ class TestPreservedBehavior:
             "last_collect_ok": True, "last_collect_age_s": 60,
             "last_collect_reason": None,
         }):
-            async with app.run_test(size=(120, 24)) as pilot:
+            async with app.run_test(size=(120, 24)):
                 strip = str(app.query_one("#service-strip").render())
                 assert "continuity" in strip.lower()
                 assert "monitoring" in strip.lower()
@@ -274,7 +273,7 @@ class TestPreservedBehavior:
     async def test_quit_rail_preserved(self, tmp_path):
         """Separate q Quit TUI rail preserved."""
         app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-        async with app.run_test(size=(120, 24)) as pilot:
+        async with app.run_test(size=(120, 24)):
             rail = str(app.query_one("#action-rail").render())
             assert "q Quit TUI" in rail
 
@@ -286,11 +285,11 @@ class TestPreservedBehavior:
             refresh_interval_s=0.2,
         )
         async with app.run_test(size=(120, 24)) as pilot:
-            headline = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             assert "polkit" in str(app.query_one("#auth-notice").render()).lower()
             # Should clear after first tick
             await pilot.pause(0.25)
-            headline_after = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             assert not app.query_one("#auth-notice").display
 
     @pytest.mark.asyncio
@@ -312,7 +311,7 @@ class TestPreservedBehavior:
             "last_collect_ok": None, "last_collect_age_s": None,
             "last_collect_reason": None,
         }):
-            async with app.run_test(size=(120, 24)) as pilot:
+            async with app.run_test(size=(120, 24)):
                 banner = str(app.query_one("#paused-banner").render())
                 assert "paused" in banner.lower()
                 assert "deliberate" in banner.lower()

tests/test_issue_80.py

@@ -8,7 +8,6 @@ Covers:
   - AC80-5: Theme roles for graph rendering
   - AC80-6: Headless interaction tests with temporary user config
 """
-import json
 import os
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
@@ -21,15 +20,12 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.store import init_store
 from fenris.preferences import (
-    load_preferences,
     save_preferences,
-    get_preference_path,
 )
-from fenris.themes import get_theme, get_graph_colors, THEME_NAMES
+from fenris.themes import get_graph_colors, THEME_NAMES
 from fenris.status_composition import (
     StatusState,
     compose_status,
-    render_status_tui,
 )
 
 
@@ -100,7 +96,7 @@ class TestPresetLoading:
         config_home = _make_prefs_dir(tmp_path)
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 # Theme should be fenris-amber
                 assert app.theme == "fenris-chalktone"
 
@@ -113,7 +109,7 @@ class TestPresetLoading:
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             save_preferences(theme="nord", reduced_motion=False)
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 assert app.theme == "fenris-nord"
 
     @pytest.mark.asyncio
@@ -125,20 +121,19 @@ class TestPresetLoading:
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             save_preferences(theme="high_contrast", reduced_motion=False)
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 assert app.theme == "fenris-high-contrast"
 
     @pytest.mark.asyncio
     async def test_tui_applies_reduced_motion_from_prefs(self, tmp_path):
         """TUI respects reduced_motion preference."""
         from fenris.tui import FenrisTuiApp
-        from fenris.status_composition import compose_status
 
         config_home = _make_prefs_dir(tmp_path)
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             save_preferences(theme="amber", reduced_motion=True)
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 # The app should have reduced_motion set
                 assert app._reduced_motion is True
 
@@ -237,7 +232,7 @@ class TestPersistence:
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             # First run: change theme via preferences API
             app1 = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app1.run_test() as pilot:
+            async with app1.run_test():
                 save_preferences(theme="nord", reduced_motion=False)
                 app1._current_theme_name = "nord"
                 app1.theme = "fenris-nord"
@@ -246,7 +241,7 @@ class TestPersistence:
 
             # Second run: theme should persist
             app2 = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app2.run_test() as pilot:
+            async with app2.run_test():
                 assert app2.theme == theme_after
 
     @pytest.mark.asyncio
@@ -334,7 +329,7 @@ class TestReducedMotion:
         config_home = _make_prefs_dir(tmp_path)
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 # The app should check for reduced motion on mount
                 assert hasattr(app, '_reduced_motion')
 
@@ -380,7 +375,7 @@ class TestSafePersistence:
 
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 # TUI should start with default theme
                 assert app.theme == "fenris-chalktone"
                 # Dashboard should be functional
@@ -399,7 +394,7 @@ class TestSafePersistence:
 
         with patch.dict(os.environ, {"XDG_CONFIG_HOME": str(config_home)}):
             app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 # TUI should start without crash
                 assert app.theme in ("fenris-chalktone", "fenris-amber", "fenris-nord", "fenris-high-contrast")
 

tests/test_issue_92.py

@@ -10,7 +10,6 @@ Covers:
 - AC92-7: Keyboard actions verified from normal launch with headless driver
 - AC92-8: Equivalent clickable actions at 80x24 and constrained widths
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from unittest.mock import patch
@@ -111,7 +110,6 @@ def _make_app(tmp_path, clock=None):
     """
     if clock is None:
         clock = _clock()
-    from unittest.mock import patch
     import fenris.tui as tui_mod
     from datetime import datetime as _real_datetime
 

tests/test_issue_93.py

@@ -11,7 +11,6 @@ Seams:
 - Read side: query_local_day_history() returns entries with evidence flags
 - Repair: repair_derivation() does not touch existing local_days
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from typing import Any, Dict
@@ -21,7 +20,7 @@ import sys
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.store import init_store, SCHEMA_VERSION
+from fenris.store import init_store
 from fenris.local_day import (
     derive_local_day_summary,
     persist_local_day,
@@ -29,11 +28,9 @@ from fenris.local_day import (
     query_local_day_history,
     LocalDaySummary,
     LocalDayHistoryEntry,
-    _is_detail_available,
 )
-from fenris.pruning import prune_old_samples, RAW_SAMPLE_RETENTION_DAYS
+from fenris.pruning import prune_old_samples
 from fenris.repair import repair_derivation
-from fenris.monitoring_periods import ensure_period_open, close_period
 
 
 # ---------------------------------------------------------------------------
@@ -226,7 +223,7 @@ class TestBoundaryPreservation:
         _insert_sample(conn, "2026-09-16T23:55:00+00:00", bw=100)
         _insert_sample(conn, "2026-09-17T12:30:00+00:00", bw=200)
 
-        pruned = prune_old_samples(conn, now, retention_days=14)
+        prune_old_samples(conn, now, retention_days=14)
 
         # Boundary anchor should be retained
         cursor = conn.execute(
@@ -305,7 +302,6 @@ class TestLegacyDataHandling:
     def test_incomplete_legacy_labelled_correctly(self, tmp_path):
         """Legacy summary without full evidence is labelled incomplete."""
         conn = init_store(tmp_path / "obs.db")
-        now = datetime(2026, 10, 1, 12, 0, 0, tzinfo=timezone.utc)
 
         # Simulate a legacy summary that can't establish a full local-day total
         legacy = LocalDaySummary(

tests/test_legacy_migration.py

@@ -4,9 +4,6 @@ Tests the idempotent, interruption-safe import of history.jsonl into the
 observation store.
 """
 import json
-import os
-import sqlite3
-import tempfile
 from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any, Dict
@@ -17,7 +14,7 @@ import pytest
 import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.legacy import import_legacy_history, is_legacy_imported, _parse_history_line
+from fenris.legacy import import_legacy_history, _parse_history_line
 from fenris.store import init_store
 
 

tests/test_measured_activity.py

@@ -21,9 +21,7 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.collector import run_collection
-from fenris.store import init_store
 from fenris.day_aggregate import derive_day
-from fenris.monitoring_periods import ensure_period_open
 from fenris.tui import _query_daily_graph_data, _query_hourly_graph_data
 
 
@@ -247,7 +245,6 @@ class TestCrossHourAttribution:
         for day in ("2026-09-01",):
             agg = derive_day(conn, day)
             assert agg is not None
-            total_accounted = agg.bytes_written_delta + agg.bytes_read_delta
             unattributed_w = conn.execute(
                 "SELECT unattributed_bytes_written FROM day_aggregates WHERE day = ?",
                 (day,)
@@ -483,7 +480,6 @@ class TestCrossDayBoundary:
 
         # The cross-day delta is unattributed at the day level
         sep1 = day_map["2026-09-01"]
-        sep2 = day_map["2026-09-02"]
         # Both days may show the unattributed bytes
         # (the delta is added to both days' unattributed totals as evidence)
         total_w = sep1["allocated_bytes"] + sep1["unallocated_bytes"]

tests/test_monitor.py

@@ -3,7 +3,6 @@
 Spec: §8.4, §8.5, §8.6, §8.7
 """
 import json
-import sqlite3
 from datetime import datetime, timezone
 from pathlib import Path
 from unittest.mock import patch, MagicMock
@@ -56,7 +55,7 @@ class TestEnableIdempotentMatrix:
         """A fresh package install has a store directory but no database yet."""
         args = MagicMock(now=False, store_path=store_path)
 
-        with patch("fenris.monitor.enable_timer") as mock_enable:
+        with patch("fenris.monitor.enable_timer"):
             cmd_enable(args)
 
         conn = init_store(store_path)
@@ -73,7 +72,7 @@ class TestEnableIdempotentMatrix:
         
         args = MagicMock(now=False, store_path=store_path)
 
-        with patch("fenris.monitor.enable_timer") as mock_enable:
+        with patch("fenris.monitor.enable_timer"):
             cmd_enable(args)
 
         # Period should be open
@@ -98,7 +97,7 @@ class TestEnableIdempotentMatrix:
 
         args = MagicMock(now=True, store_path=store_path)
 
-        with patch("fenris.monitor.enable_timer") as mock_enable:
+        with patch("fenris.monitor.enable_timer"):
             cmd_enable(args)
 
         # Should still have exactly one open period
@@ -122,7 +121,7 @@ class TestEnableIdempotentMatrix:
 
         args = MagicMock(now=True, store_path=store_path)
 
-        with patch("fenris.monitor.enable_timer") as mock_enable:
+        with patch("fenris.monitor.enable_timer"):
             cmd_enable(args)
 
         # Should have a new open period
@@ -151,7 +150,7 @@ class TestDisableIdempotentMatrix:
 
         args = MagicMock(now=True, store_path=store_path)
 
-        with patch("fenris.monitor.disable_timer") as mock_disable:
+        with patch("fenris.monitor.disable_timer"):
             cmd_disable(args)
 
         # Period should be closed with user_disabled
@@ -169,7 +168,7 @@ class TestDisableIdempotentMatrix:
 
         args = MagicMock(now=True, store_path=store_path)
 
-        with patch("fenris.monitor.disable_timer") as mock_disable:
+        with patch("fenris.monitor.disable_timer"):
             cmd_disable(args)
 
         # No periods should exist

tests/test_monitoring_periods.py

@@ -6,9 +6,8 @@ From spec §5.2, §8.6, §9.8:
 - Powered-off time stays inside a period; disabled time does not
 - End causes: user_disabled, migrated, unknown_gap
 """
-import sqlite3
 import sys
-from datetime import datetime, timezone, timedelta
+from datetime import datetime, timezone
 from pathlib import Path
 
 import pytest

tests/test_preferences.py

@@ -10,11 +10,11 @@ Covers:
   - CLI status and collector behaviour unchanged by preferences
 """
 import json
+from datetime import datetime, timezone
 import os
 from pathlib import Path
 from unittest.mock import patch
 
-import pytest
 import sys
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
@@ -295,7 +295,3 @@ class TestCLIIsolation:
         tables_after = sorted(r[0] for r in cursor.fetchall())
         conn.close()
         assert tables_before == tables_after
-
-
-# Need datetime for CLI isolation test
-from datetime import datetime, timezone

tests/test_projection.py

@@ -9,7 +9,6 @@ Covers acceptance criteria:
 - PR-13: Baseline provenance and validation per register
 - PR-17: Arithmetic exactly E_rated = TBW * 10^12, E_implied = 100*W/p, projected = max(E-W,0)/rate
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
@@ -18,11 +17,10 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 from fenris.store import init_store
-from fenris.monitoring_periods import ensure_period_open, close_period
+from fenris.monitoring_periods import ensure_period_open
 from fenris.projection import (
     compute_projection, ConfidenceState, BaselineTier, ScenarioRange,
-    TBW_TO_BYTES, HORIZON_DAYS, WARMING_MIN_DAYS, STALENESS_HOURS,
+    TBW_TO_BYTES, DISCLOSURES,
-    YOUNG_REGIME_DAYS, DISCLOSURES, _compute_horizon_rate,
 )
 
 
@@ -1039,8 +1037,6 @@ class TestEvidenceAnchoredHorizons:
             # cumulative_bytes = 30 * 100 * 1024 * 1024
             # rate = cumulative_bytes / wall_clock
             # headline = (E_baseline - cumulative_bytes) / rate
-            E_baseline = 10.0 * TBW_TO_BYTES
-            cumulative_bytes = 30 * bw
             assert result.headline_remaining_seconds >= 0
 
     def test_zero_boundary_delta_returns_zero(self, store):

tests/test_pruning.py

@@ -5,7 +5,6 @@ day aggregates are retained indefinitely.
 
 Issue #74: Boundary anchors required for successor evidence are retained.
 """
-import sqlite3
 import sys
 from datetime import datetime, timezone, timedelta
 from pathlib import Path
@@ -124,7 +123,7 @@ class TestPruneOldSamples:
         _insert_sample(store_conn, "2026-09-16T12:30:00+00:00", 2000000)
         
         # Run pruning
-        pruned = prune_old_samples(store_conn, now, retention_days=14)
+        prune_old_samples(store_conn, now, retention_days=14)
         
         # The boundary anchor should be retained
         cursor = store_conn.execute(
@@ -148,7 +147,7 @@ class TestPruneOldSamples:
         store_conn.commit()
         
         # Run pruning
-        pruned = prune_old_samples(store_conn, now, retention_days=14)
+        prune_old_samples(store_conn, now, retention_days=14)
         
         # Keep the source samples until local-day replacement evidence exists.
         cursor = store_conn.execute(

tests/test_release.py

@@ -58,7 +58,7 @@ def _rpm_filename(version: str, release: int = 1) -> str:
 
 def _registry_upload_deb_url(version: str) -> str:
     """Expected registry upload URL for a deb package."""
-    return f"debian/pool/bookworm/main/upload"
+    return "debian/pool/bookworm/main/upload"
 
 
 def _registry_upload_rpm_url() -> str:
@@ -258,8 +258,6 @@ class TestRevisionBumping:
         """When revision is bumped, the deb filename also changes."""
         version = _get_version()
         # Deb filename includes release in nfpm naming
-        deb_r1 = f"fenris_{version}_amd64.deb"
-        deb_r2 = f"fenris_{version}_amd64.deb"
         # For deb, the filename doesn't change with revision (deb uses epoch)
         # But the RPM does — this verifies we test RPM revision correctly
         rpm_r1 = _rpm_filename(version, 1)

tests/test_repair.py

@@ -4,9 +4,8 @@ Tests the idempotent, safe repair of hour observations and day aggregates
 from surviving raw samples, boundary anchor retention, and legacy summary
 handling at actual precision.
 """
-import sqlite3
 import sys
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timezone
 from pathlib import Path
 
 import pytest
@@ -102,7 +101,6 @@ class TestRepairUsesSameEvidenceRules:
 
     def test_repair_idempotent_on_fully_derived(self, store_conn):
         """Repair on store with existing derived data does not duplicate."""
-        now = datetime(2026, 9, 15, 12, 0, 0, tzinfo=timezone.utc)
         _open_period(store_conn, "2026-09-14T00:00:00+00:00")
         
         # Insert samples that span an hour
@@ -138,7 +136,7 @@ class TestRepairUsesSameEvidenceRules:
         store_conn.commit()
         
         # Run repair
-        result = repair_derivation(store_conn)
+        repair_derivation(store_conn)
         
         # Verify marker preserved
         cursor = store_conn.execute(
@@ -265,7 +263,7 @@ class TestBoundaryAnchorRetention:
         _insert_sample(store_conn, "2026-09-29T12:00:00+00:00", 3000000)
         
         # Run pruning
-        pruned = prune_old_samples(store_conn, now, retention_days=14)
+        prune_old_samples(store_conn, now, retention_days=14)
         
         # The boundary anchor should be retained
         cursor = store_conn.execute(
@@ -286,7 +284,7 @@ class TestBoundaryAnchorRetention:
                      bytes_written_delta=1000000)
         
         # Run pruning
-        pruned = prune_old_samples(store_conn, now, retention_days=14)
+        prune_old_samples(store_conn, now, retention_days=14)
         
         # The source remains until local-day evidence is also durable.
         cursor = store_conn.execute(
@@ -309,7 +307,7 @@ class TestLegacySummaryPrecision:
                              bytes_written_delta=5000000)
         
         # Run repair
-        result = repair_derivation(store_conn)
+        repair_derivation(store_conn)
         
         # Should not create hour observations for legacy day
         cursor = store_conn.execute(
@@ -324,7 +322,7 @@ class TestLegacySummaryPrecision:
                              bytes_written_delta=5000000)
         
         # Run repair
-        result = repair_derivation(store_conn)
+        repair_derivation(store_conn)
         
         # Day aggregate should not be modified
         cursor = store_conn.execute(

tests/test_status.py

@@ -11,13 +11,11 @@ Covers:
   - Retired command rejection with migration pointers
   - Configuration error surfaced from direct reads
 """
-import os
 import sqlite3
 import sys
-import tempfile
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 
 import pytest
 
@@ -35,7 +33,7 @@ from fenris.status import (
     ACCURACY_SEC,
 )
 from fenris.store import init_store, SCHEMA_VERSION
-from fenris.projection import DISCLOSURES, ConfidenceState
+from fenris.projection import DISCLOSURES
 
 
 # ---------------------------------------------------------------------------

tests/test_status_composition.py

@@ -10,10 +10,9 @@ Covers:
   - AC78-5: Separate freshness, last outcome, boot enablement, activity facts
   - AC78-6: 5s poll reevaluates freshness from cached clock
 """
-import sqlite3
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 
 import pytest
 import sys
@@ -23,12 +22,9 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 from fenris.store import init_store
 from fenris.status_composition import (
     StatusState,
-    StatusComposition,
     compose_status,
     render_status_cli,
     render_status_tui,
-    FRESH_THRESHOLD_S,
-    STALENESS_THRESHOLD_S,
 )
 
 
@@ -682,7 +678,6 @@ class TestStoreFaultSuppression:
         conn.close()
 
     def test_newer_schema_suppresses_projection(self, tmp_path):
-        import fenris.store as store_mod
         conn = init_store(tmp_path / "test.db")
         now = _clock()
 
@@ -971,7 +966,7 @@ class TestTUIIntegration:
             "last_collect_ok": True, "last_collect_age_s": 120,
             "last_collect_reason": None,
         }):
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 strip = str(app.query_one("#service-strip").render())
                 assert "●" in strip
                 assert "Monitoring" in strip or "monitoring" in strip.lower()
@@ -997,7 +992,7 @@ class TestTUIIntegration:
             "last_collect_ok": None, "last_collect_age_s": None,
             "last_collect_reason": None,
         }):
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 strip = str(app.query_one("#service-strip").render())
                 # Should show Paused state
                 assert "‖" in strip or "Paused" in strip or "paused" in strip.lower()
@@ -1024,7 +1019,7 @@ class TestTUIIntegration:
             "last_collect_ok": False, "last_collect_age_s": 60,
             "last_collect_reason": "exit code 3",
         }):
-            async with app.run_test() as pilot:
+            async with app.run_test():
                 strip = str(app.query_one("#service-strip").render())
                 # Should show Error state
                 assert "✖" in strip or "Error" in strip or "error" in strip.lower()

tests/test_store_group_access.py

@@ -6,7 +6,6 @@ instead of degrading to the Store fault view; (2) even group members could
 not open the WAL-mode store because root-created sidecars lacked group write
 and the store directory lacked group execute-then-write.
 """
-import sqlite3
 import sys
 from pathlib import Path
 
@@ -14,7 +13,7 @@ import pytest
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.store import DEFAULT_STORE_PATH, init_store
+from fenris.store import init_store
 from fenris.status import StoreFault, open_store_readonly
 
 

tests/test_themes.py

@@ -7,7 +7,6 @@ Covers:
   - Status semantic colours/glyphs/text always win over theme
   - Global action reachability and focus contrast in every preset
 """
-import pytest
 import sys
 from pathlib import Path
 

tests/test_tui.py

@@ -13,29 +13,22 @@ import sqlite3
 from xml.etree import ElementTree
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 
 import pytest
 import sys
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from textual.app import App
-from textual.pilot import Pilot
 
-from fenris.store import init_store, SCHEMA_VERSION
+from fenris.store import init_store
-from fenris.monitoring_periods import ensure_period_open, close_period
+from fenris.monitoring_periods import ensure_period_open
 from fenris.projection import (
     ConfidenceState,
     compute_projection,
-    DISCLOSURES,
-    WARMING_MIN_DAYS,
-    STALENESS_HOURS,
-    YOUNG_REGIME_DAYS,
 )
 from fenris.status import (
     FRESH_THRESHOLD_S,
-    STALENESS_THRESHOLD_S,
     grade_freshness,
 )
 from fenris.tui import (
@@ -45,7 +38,6 @@ from fenris.tui import (
     _query_drive_health,
     _query_daily_graph_data,
     _query_hourly_graph_data,
-    _RANGE_OPTIONS,
     _RANGE_DEFAULT,
     _MIN_WIDTH,
     _MIN_HEIGHT,
@@ -283,7 +275,7 @@ class TestDenseScreen:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             assert app.query_one("#headline-band") is not None
             assert app.query_one("#usage-history") is not None
             assert app.query_one("#drive-health") is not None
@@ -303,7 +295,7 @@ class TestDenseScreen:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             headline = str(app.query_one("#headline-band").render())
             assert "remaining" in headline.lower() or "projection" in headline.lower()
 
@@ -321,7 +313,7 @@ class TestDenseScreen:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             headline = str(app.query_one("#headline-band").render())
             assert "projection confidence" in headline.lower()
             # Contributing facts shown, never a percentage as confidence
@@ -343,7 +335,7 @@ class TestDenseScreen:
         conn.close()
 
         app = FenrisTuiApp(store_path=tmp_path / "test.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             strip = str(app.query_one("#service-strip").render())
             assert "Boot:" in strip
             assert "Timer:" in strip
@@ -484,7 +476,7 @@ class TestDenseScreen:
         auth_notice = "Open with fenris (no sudo). Actions authenticate via polkit. ? Help"
 
         async with app.run_test() as pilot:
-            headline = str(app.query_one("#headline-band").render())
+            str(app.query_one("#headline-band").render())
             # Identity now shows Fenris by Bongbetic (issue #79)
             assert "Fenris by Bongbetic" in str(app.query_one("#identity").render())
             assert auth_notice in str(app.query_one("#auth-notice").render())
@@ -526,7 +518,7 @@ class TestDisclosuresAndGreeting:
     async def test_empty_store_greeting(self, tmp_path):
         """Empty store shows 'no observations yet' with enable hint."""
         app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             headline = str(app.query_one("#headline-band").render())
             assert "no observations yet" in headline.lower()
             assert "enable" in headline.lower() or "resume" in headline.lower()
@@ -591,9 +583,9 @@ class TestFirstRun:
     async def test_first_run_prompt(self, tmp_path):
         """First-run prompt makes the keyboard action and boot effect explicit."""
         app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
-        async with app.run_test() as pilot:
+        async with app.run_test():
             headline = str(app.query_one("#headline-band").render())
-            strip = str(app.query_one("#service-strip").render())
+            str(app.query_one("#service-strip").render())
             assert "no observations yet" in headline.lower()
             assert "r resume — enable monitoring and future boots" in headline.lower()
             assert "r resume" in str(app.query_one("#action-rail").render()).lower()
@@ -866,7 +858,7 @@ class TestQueryHourlyGraphData:
 class TestHistoryGraph:
     def test_empty_data(self, tmp_path):
         """Empty data shows awaiting message."""
-        app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
+        FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
         # We test the widget directly via the app's compose
         graph = HistoryGraph()
         # Simulate setting empty data
@@ -1129,7 +1121,7 @@ class TestBarGraphTUI:
         app = FenrisTuiApp(store_path=tmp_path / "nonexistent.db")
         async with app.run_test(size=(80, 24)) as pilot:
             await pilot.press("v", "v")
-            graph = app.query_one("#usage-history")
+            app.query_one("#usage-history")
             assert app.query_one("#activity-panel").border_title == "Drive activity"
 
     @pytest.mark.asyncio