diff --git a/image_prediction/config.py b/image_prediction/config.py
index f37658f..4696191 100644
--- a/image_prediction/config.py
+++ b/image_prediction/config.py
@@ -18,12 +18,12 @@ class DotIndexable:
     def __getattr__(self, item):
         return _get_item_and_maybe_make_dotindexable(self.x, item)
 
-    def __setitem__(self, key, value):
-        self.x[key] = value
-
     def __repr__(self):
         return self.x.__repr__()
 
+    def __getitem__(self, item):
+        return self.__getattr__(item)
+
 
 class Config:
     def __init__(self, config_path):
diff --git a/test/unit_tests/config_test.py b/test/unit_tests/config_test.py
new file mode 100644
index 0000000..8c16cf8
--- /dev/null
+++ b/test/unit_tests/config_test.py
@@ -0,0 +1,38 @@
+import tempfile
+
+import pytest
+import yaml
+
+from image_prediction.config import Config
+
+
+@pytest.fixture
+def config_file_content():
+    return {"A": [{"B": [1, 2]}, {"C": 3}, 4], "D": {"E": {"F": True}}}
+
+
+@pytest.fixture
+def config(config_file_content):
+    with tempfile.NamedTemporaryFile(suffix=".yaml", mode="w") as f:
+        yaml.dump(config_file_content, f, default_flow_style=False)
+        yield Config(f.name)
+
+
+def test_dot_access_key_exists(config):
+    assert config.A == [{"B": [1, 2]}, {"C": 3}, 4]
+    assert config.D.E["F"]
+
+
+def test_access_key_exists(config):
+    assert config["A"] == [{"B": [1, 2]}, {"C": 3}, 4]
+    assert config["A"][0] == {"B": [1, 2]}
+    assert config["A"][0]["B"] == [1, 2]
+    assert config["A"][0]["B"][0] == 1
+
+
+def test_dot_access_key_does_not_exists(config):
+    assert config.B is None
+
+
+def test_access_key_does_not_exists(config):
+    assert config["B"] is None