diff --git a/tests/integration/cases/config_to_model.py b/tests/integration/cases/config_to_model.py
index e345818..21aea31 100644
--- a/tests/integration/cases/config_to_model.py
+++ b/tests/integration/cases/config_to_model.py
@@ -1,89 +1,85 @@
 from ..case import Case
 from ..file import File
 
+config_to_model_before = """\
+from pydantic import BaseModel
+
+
+class A(BaseModel):
+    class Config:
+        orm_mode = True
+        validate_all = True
+
+
+class BaseConfig:
+    orm_mode = True
+    validate_all = True
+
+
+class B(BaseModel):
+    class Config(BaseConfig):
+        ...
+""".splitlines()
+
+config_to_model_after = """\
+from pydantic import ConfigDict, BaseModel
+
+
+class A(BaseModel):
+    model_config = ConfigDict(from_attributes=True, validate_default=True)
+
+
+class BaseConfig:
+    orm_mode = True
+    validate_all = True
+
+
+class B(BaseModel):
+    # TODO[pydantic]: The `Config` class inherits from another class, please create the `model_config` manually.
+    # Check https://docs.pydantic.dev/dev-v2/migration/#changes-to-config for more information.
+    class Config(BaseConfig):
+        ...
+""".splitlines()
+
+config_dict_and_settings_before = """\
+from pydantic import BaseModel, BaseSettings
+
+
+class Settings(BaseSettings):
+    sentry_dsn: str
+
+    class Config:
+        orm_mode = True
+
+
+class A(BaseModel):
+    class Config:
+        orm_mode = True
+""".splitlines()
+
+config_dict_and_settings_after = """\
+from pydantic import ConfigDict, BaseModel
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    sentry_dsn: str
+    model_config = SettingsConfigDict(from_attributes=True)
+
+
+class A(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+""".splitlines()
+
 cases = [
     Case(
         id="Replace Config class to model",
-        input=File(
-            "config_to_model.py",
-            content=[
-                "from pydantic import BaseModel",
-                "",
-                "",
-                "class A(BaseModel):",
-                "    class Config:",
-                "        orm_mode = True",
-                "        validate_all = True",
-                "",
-                "",
-                "class BaseConfig:",
-                "    orm_mode = True",
-                "    validate_all = True",
-                "",
-                "",
-                "class B(BaseModel):",
-                "    class Config(BaseConfig):",
-                "        ...",
-            ],
-        ),
-        expected=File(
-            "config_to_model.py",
-            content=[
-                "from pydantic import ConfigDict, BaseModel",
-                "",
-                "",
-                "class A(BaseModel):",
-                "    model_config = ConfigDict(from_attributes=True, validate_default=True)",
-                "",
-                "",
-                "class BaseConfig:",
-                "    orm_mode = True",
-                "    validate_all = True",
-                "",
-                "",
-                "class B(BaseModel):",
-                "    # TODO[pydantic]: The `Config` class inherits from another class, please create the `model_config` manually.",  # noqa: E501
-                "    # Check https://docs.pydantic.dev/dev-v2/migration/#changes-to-config for more information.",
-                "    class Config(BaseConfig):",
-                "        ...",
-            ],
-        ),
+        input=File("config_to_model.py", content=config_to_model_before),
+        expected=File("config_to_model.py", content=config_to_model_after),
     ),
     Case(
         id="Replace Config class on BaseSettings",
-        input=File(
-            "config_dict_and_settings.py",
-            content=[
-                "from pydantic import BaseModel, BaseSettings",
-                "",
-                "",
-                "class Settings(BaseSettings):",
-                "    sentry_dsn: str",
-                "",
-                "    class Config:",
-                "        orm_mode = True",
-                "",
-                "",
-                "class A(BaseModel):",
-                "    class Config:",
-                "        orm_mode = True",
-            ],
-        ),
-        expected=File(
-            "config_dict_and_settings.py",
-            content=[
-                "from pydantic import ConfigDict, BaseModel",
-                "from pydantic_settings import BaseSettings, SettingsConfigDict",
-                "",
-                "",
-                "class Settings(BaseSettings):",
-                "    sentry_dsn: str",
-                "    model_config = SettingsConfigDict(from_attributes=True)",
-                "",
-                "",
-                "class A(BaseModel):",
-                "    model_config = ConfigDict(from_attributes=True)",
-            ],
-        ),
+        input=File("config_dict_and_settings.py", content=config_dict_and_settings_before),
+        expected=File("config_dict_and_settings.py", content=config_dict_and_settings_after),
     ),
 ]