diff --git a/plugins/flytekit-omegaconf/tests/test_dictconfig_transformer.py b/plugins/flytekit-omegaconf/tests/test_dictconfig_transformer.py
new file mode 100644
index 0000000000..b4d9115fa9
--- /dev/null
+++ b/plugins/flytekit-omegaconf/tests/test_dictconfig_transformer.py
@@ -0,0 +1,103 @@
+import typing as t
+
+import pytest
+from flytekitplugins.omegaconf.dictconfig_transformer import (
+    check_if_valid_dictconfig,
+    extract_type_and_value_maps,
+    is_flattenable,
+    parse_type_description,
+)
+from omegaconf import DictConfig, OmegaConf
+
+from flytekit import FlyteContext
+
+
+@pytest.mark.parametrize(
+    "config, should_raise, match",
+    [
+        (OmegaConf.create({"key1": "value1", "key2": 123, "key3": True}), False, None),
+        ({"key1": "value1"}, True, "Invalid type <class 'dict'>, can only serialize DictConfigs"),
+        (
+            OmegaConf.create({"key1.with.dot": "value1", "key2": 123}),
+            True,
+            "cannot be flattened as it contains non-string keys or keys containing dots",
+        ),
+        (
+            OmegaConf.create({1: "value1", "key2": 123}),
+            True,
+            "cannot be flattened as it contains non-string keys or keys containing dots",
+        ),
+    ],
+)
+def test_check_if_valid_dictconfig(config, should_raise, match) -> None:
+    """Test check_if_valid_dictconfig with various configurations."""
+    if should_raise:
+        with pytest.raises(ValueError, match=match):
+            check_if_valid_dictconfig(config)
+    else:
+        check_if_valid_dictconfig(config)
+
+
+@pytest.mark.parametrize(
+    "config, should_flatten",
+    [
+        (OmegaConf.create({"key1": "value1", "key2": 123, "key3": True}), True),
+        (OmegaConf.create({"key1": {"nested_key1": "nested_value1", "nested_key2": 456}, "key2": "value2"}), True),
+        (OmegaConf.create({"key1.with.dot": "value1", "key2": 123}), False),
+        (OmegaConf.create({1: "value1", "key2": 123}), False),
+        (
+            OmegaConf.create(
+                {
+                    "key1": "value1",
+                    "key2": "${oc.env:VAR}",
+                    "key3": OmegaConf.create({"nested_key1": "nested_value1", "nested_key2": "${oc.env:VAR}"}),
+                }
+            ),
+            True,
+        ),
+        (OmegaConf.create({"key1": {"nested.key1": "value1"}}), False),
+        (
+            OmegaConf.create(
+                {
+                    "key1": "value1",
+                    "key2": {"nested_key1": "nested_value1", "nested.key2": "value2"},
+                    "key3": OmegaConf.create({"nested_key3": "nested_value3"}),
+                }
+            ),
+            False,
+        ),
+    ],
+)
+def test_is_flattenable(config: DictConfig, should_flatten: bool, monkeypatch: pytest.MonkeyPatch) -> None:
+    """Test flattenable and non-flattenable DictConfigs."""
+    monkeypatch.setenv("VAR", "some_value")
+    assert is_flattenable(config) == should_flatten
+
+
+def test_extract_type_and_value_maps_simple() -> None:
+    """Test extraction of type and value maps from a simple DictConfig."""
+    ctx = FlyteContext.current_context()
+    config: DictConfig = OmegaConf.create({"key1": "value1", "key2": 123, "key3": True})
+
+    type_map, value_map = extract_type_and_value_maps(ctx, config)
+
+    expected_type_map = {"key1": "builtins.str", "key2": "builtins.int", "key3": "builtins.bool"}
+
+    assert type_map == expected_type_map
+    assert "key1" in value_map
+    assert "key2" in value_map
+    assert "key3" in value_map
+
+
+@pytest.mark.parametrize(
+    "type_desc, expected_type",
+    [
+        ("builtins.int", int),
+        ("typing.List[builtins.int]", t.List[int]),
+        ("typing.Optional[builtins.int]", t.Optional[int]),
+    ],
+)
+def test_parse_type_description(type_desc: str, expected_type: t.Type) -> None:
+    """Test parsing various type descriptions."""
+    parsed_type = parse_type_description(type_desc)
+    assert parsed_type == expected_type