diff --git a/studio/backend/core/inference/diffusion_attention.py b/studio/backend/core/inference/diffusion_attention.py
index 247ae7d817..9678df4b92 100644
--- a/studio/backend/core/inference/diffusion_attention.py
+++ b/studio/backend/core/inference/diffusion_attention.py
@@ -179,7 +179,6 @@ def _pip_requirement(backend: str, package: str) -> str:
         return package
     try:
         from diffusers.models.attention_dispatch import _REQUIRED_SAGE_VERSION as floor
-
         if isinstance(floor, str) and floor.strip():
             return f"sageattention>={floor.strip()}"
     except Exception:  # noqa: BLE001 — older/newer diffusers may not expose it; keep the static pin
diff --git a/studio/backend/routes/inference.py b/studio/backend/routes/inference.py
index 2dc9113ec0..fcd65cef61 100644
--- a/studio/backend/routes/inference.py
+++ b/studio/backend/routes/inference.py
@@ -16377,7 +16377,10 @@ async def generate_diffusion_image(
                         "loras": (
                             [f"{l.id}:{l.weight:g}" for l in request.loras]
                             if request.loras
-                            else [f"{name}:{weight:g}" for name, weight in result.get("active_loras") or []]
+                            else [
+                                f"{name}:{weight:g}"
+                                for name, weight in result.get("active_loras") or []
+                            ]
                         ),
                         "controlnet": (
                             f"{request.controlnet.id}:{request.controlnet.control_type}:"
diff --git a/studio/backend/routes/models.py b/studio/backend/routes/models.py
index 3d44e15964..e7d6b188e6 100644
--- a/studio/backend/routes/models.py
+++ b/studio/backend/routes/models.py
@@ -3318,7 +3318,6 @@ def _arch_to_task(arch: Optional[str], name_hints: tuple[Optional[str], ...] = (
         # Same shape as the video branch: the arch is shared, so let the family detection the
         # loader itself uses decide, trying each hint separately (a repo id, then a filename).
         from core.inference.diffusion_families import detect_family_for_pick, family_gguf_loadable
-
         for hint in name_hints:
             if not hint:
                 continue
diff --git a/studio/backend/tests/test_cached_gguf_routes.py b/studio/backend/tests/test_cached_gguf_routes.py
index 1122163fb1..0c0951ec79 100644
--- a/studio/backend/tests/test_cached_gguf_routes.py
+++ b/studio/backend/tests/test_cached_gguf_routes.py
@@ -1397,9 +1397,9 @@ def test_arch_to_task_agrees_with_the_loader_on_ambiguous_archs():
             loader_accepts = True
         except (ValueError, FileNotFoundError):
             loader_accepts = False
-        assert (task == "text-to-image") == loader_accepts, (
-            f"{fam.name}: picker task={task} but loader accepts={loader_accepts}"
-        )
+        assert (
+            task == "text-to-image"
+        ) == loader_accepts, f"{fam.name}: picker task={task} but loader accepts={loader_accepts}"
 
 
 def _clear_chat_delete_guards(monkeypatch):
diff --git a/studio/backend/tests/test_diffusion_auto_policy.py b/studio/backend/tests/test_diffusion_auto_policy.py
index d8a93ffaee..470ed204bf 100644
--- a/studio/backend/tests/test_diffusion_auto_policy.py
+++ b/studio/backend/tests/test_diffusion_auto_policy.py
@@ -207,7 +207,6 @@ def test_disk_gate_matches_download_for_bf16_published_families(monkeypatch):
     # Families that publish bf16 download what they occupy (measured 0.99-1.07x), so the two
     # numbers stay equal and no factor entry is needed.
     import core.inference.diffusion_auto_policy as ap
-
     for name in ("flux.1", "flux.2-dev", "qwen-image", "krea-2", "hidream-i1"):
         est = ap.estimate_dense_quant(_fam(name), "int8")
         assert est.download_transformer_mib == est.transient_transformer_mib, name
diff --git a/studio/backend/tests/test_sd_cpp_args.py b/studio/backend/tests/test_sd_cpp_args.py
index 8ed48e967a..7f168ddcd9 100644
--- a/studio/backend/tests/test_sd_cpp_args.py
+++ b/studio/backend/tests/test_sd_cpp_args.py
@@ -75,14 +75,19 @@ def test_metal_text_encoder_flag_reaches_both_command_builders(monkeypatch):
         binary = "sd-server", files = files, host = "127.0.0.1", port = 1234
     )
     cli = build_sd_cpp_command(
-        binary = "sd-cli", files = files, params = SdCppGenParams(prompt = "x"),
+        binary = "sd-cli",
+        files = files,
+        params = SdCppGenParams(prompt = "x"),
         output_path = "/o/x.png",
     )
     assert server.count("--clip-on-cpu") == 1
     assert cli.count("--clip-on-cpu") == 1
     # An offload policy that already pins the encoder must not emit it twice.
     dual = build_sd_cpp_server_command(
-        binary = "sd-server", files = files, host = "127.0.0.1", port = 1234,
+        binary = "sd-server",
+        files = files,
+        host = "127.0.0.1",
+        port = 1234,
         offload = offload_flags("model"),
     )
     assert dual.count("--clip-on-cpu") == 1