diff --git a/tests/test_litellm/llms/databricks/test_databricks_common_utils.py b/tests/test_litellm/llms/databricks/test_databricks_common_utils.py
index 7f7ec8e9000..5b38cacb065 100644
--- a/tests/test_litellm/llms/databricks/test_databricks_common_utils.py
+++ b/tests/test_litellm/llms/databricks/test_databricks_common_utils.py
@@ -30,3 +30,88 @@ def test_databricks_validate_environment():
         except Exception:
             pass
         mock_get_credentials.assert_called_once()
+
+
+def test_databricks_validate_environment_oauth_m2m_from_litellm_params():
+    """Test that client_id/client_secret from litellm_params are used for OAuth M2M auth."""
+    databricks_base = DatabricksBase()
+
+    with patch.object(
+        databricks_base, "_get_oauth_m2m_token", return_value="fake_token"
+    ) as mock_get_token:
+        api_base, headers = databricks_base.databricks_validate_environment(
+            api_key=None,
+            api_base="https://my-workspace.databricks.com/serving-endpoints",
+            endpoint_type="chat_completions",
+            custom_endpoint=False,
+            headers=None,
+            client_id="my-client-id",
+            client_secret="my-client-secret",
+        )
+
+        mock_get_token.assert_called_once_with(
+            "https://my-workspace.databricks.com/serving-endpoints",
+            "my-client-id",
+            "my-client-secret",
+        )
+        assert headers["Authorization"] == "Bearer fake_token"
+
+
+def test_databricks_validate_environment_oauth_m2m_params_override_env():
+    """Test that litellm_params client_id/client_secret take priority over env vars."""
+    databricks_base = DatabricksBase()
+
+    with patch.dict(
+        os.environ,
+        {
+            "DATABRICKS_CLIENT_ID": "env-client-id",
+            "DATABRICKS_CLIENT_SECRET": "env-client-secret",
+        },
+    ), patch.object(
+        databricks_base, "_get_oauth_m2m_token", return_value="fake_token"
+    ) as mock_get_token:
+        databricks_base.databricks_validate_environment(
+            api_key=None,
+            api_base="https://my-workspace.databricks.com/serving-endpoints",
+            endpoint_type="chat_completions",
+            custom_endpoint=False,
+            headers=None,
+            client_id="param-client-id",
+            client_secret="param-client-secret",
+        )
+
+        # litellm_params values should take priority over env vars
+        mock_get_token.assert_called_once_with(
+            "https://my-workspace.databricks.com/serving-endpoints",
+            "param-client-id",
+            "param-client-secret",
+        )
+
+
+def test_databricks_validate_environment_oauth_m2m_falls_back_to_env():
+    """Test that env vars are used when litellm_params don't have client_id/client_secret."""
+    databricks_base = DatabricksBase()
+
+    with patch.dict(
+        os.environ,
+        {
+            "DATABRICKS_CLIENT_ID": "env-client-id",
+            "DATABRICKS_CLIENT_SECRET": "env-client-secret",
+        },
+    ), patch.object(
+        databricks_base, "_get_oauth_m2m_token", return_value="fake_token"
+    ) as mock_get_token:
+        databricks_base.databricks_validate_environment(
+            api_key=None,
+            api_base="https://my-workspace.databricks.com/serving-endpoints",
+            endpoint_type="chat_completions",
+            custom_endpoint=False,
+            headers=None,
+        )
+
+        # Should fall back to env vars
+        mock_get_token.assert_called_once_with(
+            "https://my-workspace.databricks.com/serving-endpoints",
+            "env-client-id",
+            "env-client-secret",
+        )