diff --git a/tests/unit/test_1749_edit_plan_service_new_methods.py b/tests/unit/test_1749_edit_plan_service_new_methods.py
index bf59519a5..af766224e 100644
--- a/tests/unit/test_1749_edit_plan_service_new_methods.py
+++ b/tests/unit/test_1749_edit_plan_service_new_methods.py
@@ -9,9 +9,9 @@ from unittest.mock import MagicMock, patch
 
 import pytest
 
-
 # ── helpers ───────────────────────────────────────────────────────────────────
 
+
 def _make_svc():
     """构造 EditPlanService，mock 掉 DB/repos。"""
     from app.services.edit_plan_service import EditPlanService
@@ -165,22 +165,20 @@ class TestEnsureVariantPlans:
 
     def test_count_1_with_voice(self):
         svc = self._setup_svc()
-        result = svc.ensure_variant_plans(
-            "src", 1, ["a1"], voice_durations=[30.0]
-        )
+        result = svc.ensure_variant_plans("src", 1, ["a1"], voice_durations=[30.0])
         assert result == ["plan_v0"]
         svc.apply_voice_duration_to_plan.assert_called_once_with("plan_v0", 30.0)
 
     def test_count_3_with_voice(self):
         svc = self._setup_svc()
-        svc.reselect_plan_for_variant = MagicMock(side_effect=[
-            MagicMock(id="plan_v1"),
-            MagicMock(id="plan_v2"),
-        ])
-
-        result = svc.ensure_variant_plans(
-            "src", 3, ["a1", "a2"], voice_durations=[30.0, 20.0, 15.0]
+        svc.reselect_plan_for_variant = MagicMock(
+            side_effect=[
+                MagicMock(id="plan_v1"),
+                MagicMock(id="plan_v2"),
+            ]
         )
+
+        result = svc.ensure_variant_plans("src", 3, ["a1", "a2"], voice_durations=[30.0, 20.0, 15.0])
         assert len(result) == 3
         assert result[0] == "plan_v0"
         # v0 配音
@@ -191,7 +189,5 @@ class TestEnsureVariantPlans:
     def test_voice_apply_failure_not_blocking(self):
         svc = self._setup_svc()
         svc.apply_voice_duration_to_plan.side_effect = RuntimeError("boom")
-        result = svc.ensure_variant_plans(
-            "src", 1, ["a1"], voice_durations=[30.0]
-        )
+        result = svc.ensure_variant_plans("src", 1, ["a1"], voice_durations=[30.0])
         assert result == ["plan_v0"]
diff --git a/tests/unit/test_1749_preview_batch_voice_allocation.py b/tests/unit/test_1749_preview_batch_voice_allocation.py
index d94fa4029..9882c4ba4 100644
--- a/tests/unit/test_1749_preview_batch_voice_allocation.py
+++ b/tests/unit/test_1749_preview_batch_voice_allocation.py
@@ -7,13 +7,13 @@
 
 from __future__ import annotations
 
-from unittest.mock import MagicMock, patch, call
+from unittest.mock import MagicMock, call, patch
 
 import pytest
 
-
 # ── 辅助 ──────────────────────────────────────────────────────────────────────
 
+
 def _make_user():
     mu = MagicMock()
     mu.user.id = "u1"
diff --git a/tests/unit/test_1749_variant_plans_route.py b/tests/unit/test_1749_variant_plans_route.py
index 3e4068652..40a1a4303 100644
--- a/tests/unit/test_1749_variant_plans_route.py
+++ b/tests/unit/test_1749_variant_plans_route.py
@@ -14,7 +14,6 @@ from __future__ import annotations
 from unittest.mock import MagicMock, patch
 
 import pytest
-
 from fastapi import HTTPException