diff --git a/tests/test_config.py b/tests/test_config.py
new file mode 100644
index 000000000..5fcec96d6
--- /dev/null
+++ b/tests/test_config.py
@@ -0,0 +1,194 @@
+"""
+Tests for tortoise.config module - TortoiseConfig class.
+"""
+
+import shutil
+from pathlib import Path
+
+import orjson
+import pytest
+import yaml
+
+from tortoise.backends.base.config_generator import expand_db_url
+from tortoise.config import AppConfig, DBUrlConfig, TortoiseConfig
+from tortoise.exceptions import ConfigurationError
+
+
+class TestTortoiseConfig:
+    @pytest.fixture
+    def db_url(self) -> str:
+        return "sqlite://db.sqlite3"
+
+    @pytest.fixture
+    def simple_config(self, db_url: str) -> dict:
+        return {
+            "connections": {"default": db_url},
+            "apps": {
+                "app": {
+                    "models": ["app.models"],
+                    "default_connection": "default",
+                }
+            },
+        }
+
+    @pytest.mark.parametrize(
+        "config,msg",
+        [
+            ([], "TortoiseConfig must be created from a mapping"),
+            ({}, 'Config must define "connections" section'),
+            ({"connections": ""}, 'Config must define "apps" section'),
+            ({"connections": "", "apps": ""}, 'Config "connections" must be a mapping'),
+            (
+                {"connections": {"default": []}, "apps": ""},
+                "Connection values must be mapping or string",
+            ),
+            (
+                {"connections": {"default": ""}, "apps": ""},
+                "DBUrlConfig.url must be a non-empty string",
+            ),
+            (
+                {"connections": {"default": "db.sqlite3"}, "apps": ""},
+                'Config "apps" must be a mapping',
+            ),
+            (
+                {"connections": {"default": "db.sqlite3"}, "apps": {"auth": ""}},
+                "App values must be mappings",
+            ),
+            (
+                {"connections": {"default": "db.sqlite3"}, "apps": {"auth": {}}, "routers": {}},
+                'AppConfig requires "models"',
+            ),
+            (
+                {
+                    "connections": {"default": "db.sqlite3"},
+                    "apps": {"auth": {"models": []}},
+                    "routers": {},
+                },
+                "AppConfig.models must be a non-empty list of strings",
+            ),
+            (
+                {
+                    "connections": {"default": "db.sqlite3"},
+                    "apps": {"auth": {"models": ["models"]}},
+                    "routers": "",
+                },
+                "TortoiseConfig.routers must be a list or None",
+            ),
+        ],
+    )
+    def test_from_invalid_dict(self, config: list | dict, msg: str):
+        with pytest.raises(ConfigurationError, match=msg):
+            TortoiseConfig.from_dict(config)  # type: ignore
+
+    def test_from_dict(self, simple_config: dict):
+        assert TortoiseConfig.from_dict(simple_config) == TortoiseConfig(
+            connections={"default": DBUrlConfig(url="sqlite://db.sqlite3")},
+            apps={
+                "app": AppConfig(
+                    models=["app.models"], default_connection="default", migrations=None
+                )
+            },
+            routers=None,
+            use_tz=None,
+            timezone=None,
+        )
+        full = {
+            "connections": {
+                "default": "sqlite://db.sqlite3",
+                "second": "sqlite://db2.sqlite3",
+            },
+            "apps": {
+                "app1": {
+                    "models": ["app1.models"],
+                    "migrations": "app1.migrations",
+                },
+                "app2": {
+                    "models": ["app2.models"],
+                    "default_connection": "second",
+                    "migrations": "app2.migrations",
+                },
+            },
+            "routers": ["path.Router"],
+            "use_tz": True,
+            "timezone": "UTC",
+        }
+        assert TortoiseConfig.from_dict(full) == TortoiseConfig(
+            connections={
+                "default": DBUrlConfig(url="sqlite://db.sqlite3"),
+                "second": DBUrlConfig(url="sqlite://db2.sqlite3"),
+            },
+            apps={
+                "app1": AppConfig(
+                    models=["app1.models"], default_connection=None, migrations="app1.migrations"
+                ),
+                "app2": AppConfig(
+                    models=["app2.models"],
+                    default_connection="second",
+                    migrations="app2.migrations",
+                ),
+            },
+            routers=["path.Router"],
+            use_tz=True,
+            timezone="UTC",
+        )
+
+    def test_from_config_file(self, tmp_path: Path, simple_config: dict):
+        file = tmp_path / "tortoise_conf.json"
+        file.write_bytes(orjson.dumps(simple_config))
+        filename: str = file.as_posix()
+        assert (
+            TortoiseConfig.from_config_file(file)
+            == TortoiseConfig.from_config_file(filename)
+            == TortoiseConfig.from_dict(simple_config)
+            == TortoiseConfig.resolve_args(config_file=file)
+        )
+
+        yaml_file = file.with_suffix(".yml")
+        with yaml_file.open("w") as f:
+            yaml.safe_dump(simple_config, f, default_flow_style=False)
+        yaml_file_2 = file.with_suffix(".yaml")
+        shutil.copy(yaml_file, yaml_file_2)
+        assert (
+            TortoiseConfig.from_config_file(yaml_file)
+            == TortoiseConfig.from_config_file(str(yaml_file))
+            == TortoiseConfig.from_config_file(yaml_file_2)
+            == TortoiseConfig.from_config_file(file)
+            == TortoiseConfig.resolve_args(config_file=yaml_file)
+        )
+
+    def test_from_db_url_and_modules(self, simple_config: dict, db_url: str):
+        modules = {"app": simple_config["apps"]["app"]["models"]}
+        typed_config = TortoiseConfig.from_db_url_and_modules(db_url, modules)
+        assert typed_config == TortoiseConfig.resolve_args(db_url=db_url, modules=modules)
+        assert typed_config.apps == TortoiseConfig.from_dict(simple_config).apps
+
+    @pytest.mark.parametrize(
+        "config,msg",
+        [
+            ({}, "Must provide either 'config', 'config_file', or both 'db_url' and 'modules'"),
+            (
+                dict(db_url=""),
+                "Must provide either 'config', 'config_file', or both 'db_url' and 'modules'",
+            ),
+            (
+                dict(config={}, config_file="a.json"),
+                "Cannot specify both 'config' and 'config_file'",
+            ),
+        ],
+    )
+    def test_resolve_args_invalid(self, config: dict, msg: str):
+        with pytest.raises(ConfigurationError, match=msg):
+            TortoiseConfig.resolve_args(**config)
+
+    def test_resolve_args(self, tmp_path: Path, db_url: str, simple_config: dict):
+        config_file = tmp_path / "config.json"
+        config_file.write_bytes(orjson.dumps(simple_config))
+        typed_config = TortoiseConfig.resolve_args(simple_config)
+        assert typed_config == TortoiseConfig.resolve_args(config_file=config_file)
+
+        typed_config_2 = TortoiseConfig.resolve_args(db_url=db_url, modules={"app": ["app.models"]})
+        assert typed_config.apps == typed_config_2.apps
+        assert (
+            expand_db_url(str(typed_config.connections["default"].to_config()))
+            == typed_config_2.connections["default"].to_config()
+        )
diff --git a/tortoise/config.py b/tortoise/config.py
index f7527093b..c0d334f35 100644
--- a/tortoise/config.py
+++ b/tortoise/config.py
@@ -1,9 +1,9 @@
 from __future__ import annotations
 
 import json
-import os
 from collections.abc import Mapping
 from dataclasses import dataclass, field
+from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
 from tortoise.backends.base.config_generator import generate_config
@@ -217,12 +217,12 @@ def from_dict(cls, data: Mapping[str, Any]) -> Self:
         )
 
     @classmethod
-    def from_config_file(cls, config_file: str) -> Self:
+    def from_config_file(cls, config_file: Path | str) -> Self:
         """
         Load configuration from a YAML or JSON file.
 
         Args:
-            config_file (str): Path to the configuration file. Supported extensions: .yml, .yaml, .json.
+            config_file: Path to the configuration file. Supported extensions: .yml, .yaml, .json.
 
         Returns:
             Self: The constructed TortoiseConfig.
@@ -230,19 +230,19 @@ def from_config_file(cls, config_file: str) -> Self:
         Raises:
             ConfigurationError: If the file is missing, unsupported, or contents are invalid.
         """
-        _, extension = os.path.splitext(config_file)
-        if extension in (".yml", ".yaml"):
-            import yaml  # pylint: disable=C0415
-
-            with open(config_file) as f:
-                config = yaml.safe_load(f)
-        elif extension == ".json":
-            with open(config_file) as f:
-                config = json.load(f)
-        else:
-            raise ConfigurationError(
-                f"Unknown config extension {extension}, only .yml and .json are supported"
-            )
+        config_path = Path(config_file)
+        match config_path.suffix:
+            case ".yml" | ".yaml":
+                import yaml  # pylint: disable=C0415
+
+                with open(config_file) as f:
+                    config = yaml.safe_load(f)
+            case ".json":
+                config = json.loads(config_path.read_bytes())
+            case _ as extension:
+                raise ConfigurationError(
+                    f"Unknown config extension {extension}, only .yml and .json are supported"
+                )
         return cls.from_dict(config)
 
     @classmethod
@@ -274,7 +274,7 @@ def from_db_url_and_modules(
     def resolve_args(
         cls,
         config: dict[str, Any] | Self | None = None,
-        config_file: str | None = None,
+        config_file: Path | str | None = None,
         db_url: str | None = None,
         modules: dict[str, Iterable[str | ModuleType]] | None = None,
     ) -> Self:
@@ -286,14 +286,9 @@ def resolve_args(
             - `config_file` path,
             - or both `db_url` and `modules`.
 
-        Args:
-            config (dict[str, Any] | TortoiseConfig | None):
-            config_file (str | None): Path to a config YAML or JSON file.
-            db_url (str | None): Database URL for config generation.
-            modules (dict[str, Iterable[str | ModuleType]] | None): App modules for config generation.
         Args:
             config: A configuration dict or TortoiseConfig instance.
-            config_file: Path to config file.
+            config_file: Path to a config YAML or JSON file.
             db_url: Database URL for config generation.
             modules: App modules for config generation.