diff --git a/api/core/entities/provider_configuration.py b/api/core/entities/provider_configuration.py
index c8f1a2ab7f..5418dd0490 100644
--- a/api/core/entities/provider_configuration.py
+++ b/api/core/entities/provider_configuration.py
@@ -101,7 +101,7 @@ class ProviderConfiguration(BaseModel):
                 self.provider.configurate_methods.append(ConfigurateMethod.PREDEFINED_MODEL)
         return self
 
-    def bind_model_runtime(self, model_runtime: "ModelRuntime") -> None:
+    def bind_model_runtime(self, model_runtime: ModelRuntime) -> None:
         """Attach the already-composed runtime for request-bound call chains."""
         self._bound_model_runtime = model_runtime
 
diff --git a/api/tests/unit_tests/core/entities/test_entities_provider_configuration.py b/api/tests/unit_tests/core/entities/test_entities_provider_configuration.py
index 84ecc3d2e8..23ae91fdf2 100644
--- a/api/tests/unit_tests/core/entities/test_entities_provider_configuration.py
+++ b/api/tests/unit_tests/core/entities/test_entities_provider_configuration.py
@@ -467,7 +467,9 @@ def test_get_model_type_instance_and_schema_reuse_bound_runtime_factory() -> Non
     mock_factory.get_model_schema.return_value = mock_schema
 
     with (
-        patch("core.entities.provider_configuration.ModelProviderFactory", return_value=mock_factory) as mock_factory_cls,
+        patch(
+            "core.entities.provider_configuration.ModelProviderFactory", return_value=mock_factory
+        ) as mock_factory_cls,
         patch("core.entities.provider_configuration.create_plugin_model_provider_factory") as mock_factory_builder,
     ):
         model_type_instance = configuration.get_model_type_instance(ModelType.LLM)
diff --git a/api/tests/unit_tests/core/plugin/test_model_runtime_adapter.py b/api/tests/unit_tests/core/plugin/test_model_runtime_adapter.py
index 4c4d864eb8..a2180bc6ba 100644
--- a/api/tests/unit_tests/core/plugin/test_model_runtime_adapter.py
+++ b/api/tests/unit_tests/core/plugin/test_model_runtime_adapter.py
@@ -10,7 +10,7 @@ import pytest
 from core.plugin.entities.plugin_daemon import PluginModelProviderEntity
 from core.plugin.impl import model_runtime as model_runtime_module
 from core.plugin.impl.model import PluginModelClient
-from core.plugin.impl.model_runtime import PluginModelRuntime, TENANT_SCOPE_SCHEMA_CACHE_USER_ID
+from core.plugin.impl.model_runtime import TENANT_SCOPE_SCHEMA_CACHE_USER_ID, PluginModelRuntime
 from core.plugin.impl.model_runtime_factory import create_plugin_model_runtime
 from dify_graph.model_runtime.entities.common_entities import I18nObject
 from dify_graph.model_runtime.entities.model_entities import AIModelEntity, FetchFrom, ModelType