diff --git a/tests/test_import_invariants.py b/tests/test_import_invariants.py
index 40347fa..bcc1ddf 100644
--- a/tests/test_import_invariants.py
+++ b/tests/test_import_invariants.py
@@ -15,6 +15,7 @@ Missing *third-party* optional dependencies (customtkinter, PIL, ...) are
 skipped, not failed: those are legitimately absent in headless environments.
 Broken *internal* references always fail.
 """
+
 from __future__ import annotations
 
 import ast
@@ -124,10 +125,9 @@ def test_antigravity_provider_loads_from_repo() -> None:
     """Verify that antigravity_provider is loaded from the repository src, not from %LOCALAPPDATA%."""
     import antigravity_provider
     import antigravity_provider.runtime
-    
+
     pkg_file = Path(antigravity_provider.__file__).resolve()
     runtime_file = Path(antigravity_provider.runtime.__file__).resolve()
-    
+
     assert str(PACKAGE_ROOT.resolve()) in str(pkg_file) or str(PACKAGE_ROOT.resolve()) in str(pkg_file.parent)
     assert str(PACKAGE_ROOT.resolve()) in str(runtime_file)
-
diff --git a/tests/test_state_layer_and_event_driven_quota.py b/tests/test_state_layer_and_event_driven_quota.py
index 0296683..82dab22 100644
--- a/tests/test_state_layer_and_event_driven_quota.py
+++ b/tests/test_state_layer_and_event_driven_quota.py
@@ -1,4 +1,5 @@
 """Comprehensive tests for Task A: State Layer, Event-Driven Quota, Seq-Guards, and OAuth Lifecycle."""
+
 from __future__ import annotations
 
 import time
@@ -26,14 +27,14 @@ def test_targeted_account_quota_delta_event():
     """Verify that updating an account's quota produces EVENT_QUOTA_UPDATED with exact account identifiers."""
     bus = EventBus.get()
     store = HubStateStore.get()
-    
+
     received_events = []
-    
+
     def _listener(name, payload):
         received_events.append((name, payload))
-        
+
     bus.subscribe(EVENT_QUOTA_UPDATED, _listener)
-    
+
     try:
         bucket = QuotaBucket(
             id="antigravity.claude.5h",
@@ -49,9 +50,9 @@ def test_targeted_account_quota_delta_event():
             buckets=[bucket],
             source="runtime_event",
         )
-        
+
         store.apply_delta_quota_updated("antigravity", "ag-orch-primary", snap)
-        
+
         assert len(received_events) >= 1
         name, payload = received_events[-1]
         assert name == EVENT_QUOTA_UPDATED
@@ -67,15 +68,15 @@ def test_targeted_account_quota_delta_event():
 def test_seq_token_prevents_stale_refresh_clobber():
     """Verify that an out-of-order stale background response cannot overwrite fresher state."""
     store = HubStateStore.get()
-    
+
     seq_fresh = store.next_seq()
     snap_fresh = store.refresh(force_scan=False, seq=seq_fresh)
     gen_fresh = snap_fresh.generation
-    
+
     # Simulate a delayed/stale response from an earlier seq counter
     seq_stale = seq_fresh - 1
     snap_after_stale = store.refresh(force_scan=False, seq=seq_stale)
-    
+
     # Stale response must be rejected, retaining the fresh generation
     assert snap_after_stale.generation == gen_fresh
     assert store.refresh_skipped_total >= 1
@@ -86,25 +87,25 @@ def test_account_added_and_removed_delta_events():
     """Verify that account added and removed delta methods fire targeted events without global scan."""
     bus = EventBus.get()
     store = HubStateStore.get()
-    
+
     added_events = []
     removed_events = []
-    
+
     def _on_added(name, payload):
         added_events.append(payload)
-        
+
     def _on_removed(name, payload):
         removed_events.append(payload)
-        
+
     bus.subscribe(EVENT_ACCOUNT_ADDED, _on_added)
     bus.subscribe(EVENT_ACCOUNT_REMOVED, _on_removed)
-    
+
     try:
         store.apply_delta_account_added("openai-codex", "codex-slot-2")
         assert len(added_events) >= 1
         assert added_events[-1]["provider"] == "openai-codex"
         assert added_events[-1]["profile_id"] == "codex-slot-2"
-        
+
         store.apply_delta_account_removed("openai-codex", "codex-slot-2")
         assert len(removed_events) >= 1
         assert removed_events[-1]["provider"] == "openai-codex"
@@ -119,17 +120,17 @@ def test_provider_refresh_scheduler_execution():
     """Verify HermesRefreshScheduler.trigger_refresh_provider refreshes specific provider."""
     scheduler = HermesRefreshScheduler.get()
     completed = []
-    
+
     def _on_done():
         completed.append(True)
-        
+
     scheduler.trigger_refresh_provider("antigravity", on_complete=_on_done)
-    
+
     # Wait briefly for worker thread
     t0 = time.time()
     while not completed and (time.time() - t0 < 3.0):
         time.sleep(0.05)
-        
+
     assert len(completed) == 1
 
 
@@ -139,19 +140,19 @@ def test_antigravity_claude_vs_gemini_quota_bucket_isolation():
     snap = AccountQuotaService.get()._generate_baseline_snapshot("antigravity", "ag-orch-primary")
     assert snap is not None
     assert len(snap.buckets) >= 2
-    
+
     claude_bucket = snap.get_bucket_for_model("claude-3-7-sonnet")
     gemini_bucket = snap.get_bucket_for_model("gemini-2.5-pro")
-    
+
     assert claude_bucket is not None
     assert gemini_bucket is not None
     assert claude_bucket.model_family == "claude"
     assert gemini_bucket.model_family == "gemini"
     assert claude_bucket.id != gemini_bucket.id
-    
+
     # Mark claude exhausted
     claude_bucket.status = "exhausted"
     claude_bucket.remaining_percent = 0.0
-    
+
     assert snap.is_model_available("claude-3-7-sonnet") is False
     assert snap.is_model_available("gemini-2.5-pro") is True