diff --git a/.codespell-whitelist.txt b/.codespell-whitelist.txt
new file mode 100644
index 00000000..1449575d
--- /dev/null
+++ b/.codespell-whitelist.txt
@@ -0,0 +1 @@
+datas
\ No newline at end of file
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 26c13585..6a28b1f4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,6 +40,7 @@ repos:
     rev: v2.2.1
     hooks:
       - id: codespell
+        args: [--ignore-words=.codespell-whitelist.txt]
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: v3.0.0-alpha.9-for-vscode
     hooks:
diff --git a/tests/test_config.json b/tests/test_config.json
index 2745f1a8..1953c804 100644
--- a/tests/test_config.json
+++ b/tests/test_config.json
@@ -11,6 +11,12 @@
       "num_classes": 12
     }
   },
+  "datas": {
+    "default": {
+      "name": "cifar10",
+      "root": "datasets"
+    }
+  },
   "network": {
     "name": "ResNet18",
     "num_classes": 12,
diff --git a/tests/test_config.py b/tests/test_config.py
index 19c32075..1735147f 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -25,6 +25,7 @@ def __init__(self, *args, **kwargs):
         self.seed = Variable(1013)
         data_factory = partial(DataConfig, name="CIFAR10")
         self.datasets = Config(default_factory=data_factory)
+        self.datas = Config(default_factory=data_factory)
         self.datasets.a.num_classes = num_classes
         self.datasets.b.num_classes = num_classes
         self.network.name = "ResNet18"
@@ -34,6 +35,10 @@ def post(self):
         self.name = self.name.lower()
         self.id = f"{self.name}_{self.seed}"
 
+    @property
+    def data(self):
+        return next(iter(self.datas.values())) if self.datas else self.datas["default"]
+
 
 class Test:
     config = TestConfig()
@@ -48,9 +53,10 @@ def test_post(self):
         assert self.config.datasets.a.name == "cifar10"
 
     def test_parse(self):
-        self.config.parse(["--name", "Test", "--seed", "1014"])
+        self.config.parse(["--name", "Test", "--seed", "1014", "--data.root", "datasets"])
         assert self.config.name == "test"
         assert self.config.id == "test_1014"
+        assert self.config.data.name == "cifar10"
 
     def test_nested(self):
         assert self.config.network.name == "ResNet18"