diff --git a/.importanizerc b/.importanizerc
index 05c3647..f02a403 100644
--- a/.importanizerc
+++ b/.importanizerc
@@ -1,13 +1,11 @@
 {
-    "add_imports": [
-        "from __future__ import absolute_import, print_function, unicode_literals"
-    ],
-    "length": 120,
-    "groups": [
-        {"type": "stdlib"},
-        {"type": "remainder"},
-        {"type": "packages", "packages": ["django"]},
-        {"type": "packages", "packages": ["rest_framework"]},
-        {"type": "local"}
-    ]
+  "length": 120,
+  "groups": [
+    { "type": "stdlib" },
+    { "type": "remainder" },
+    { "type": "packages", "packages": ["django"] },
+    { "type": "packages", "packages": ["rest_framework"] },
+    { "type": "packages", "packages": ["rest_dataclasses"] },
+    { "type": "local" }
+  ]
 }
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..c7812a6
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,20 @@
+---
+language: python
+dist: xenial
+cache:
+  directories:
+    - $HOME/.cache/pip
+    - $HOME/.cache/pre-commit
+
+python:
+  - "3.7"
+
+install:
+  - pip install -U -r requirements.txt
+
+script:
+  - make lint
+  - make coverage
+
+after_success:
+  coveralls
diff --git a/setup.py b/setup.py
index 9a5f513..cf19316 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ def read(fname):
     author=about["__author__"],
     author_email=about["__author_email__"],
     description=about["__description__"],
-    install_requires=["djangorestframework"],
+    install_requires=["django", "djangorestframework"],
     license="MIT",
     long_description=read("README.rst"),
     name="django-rest-dataclasses",
diff --git a/tests/test_serializers.py b/tests/test_serializers.py
index a21067b..7e13794 100644
--- a/tests/test_serializers.py
+++ b/tests/test_serializers.py
@@ -2,13 +2,14 @@
 from __future__ import absolute_import, print_function, unicode_literals
 import dataclasses as da
 
-from rest_dataclasses.serializers import DataclassSerializer
-
+from django.core.exceptions import ValidationError as DjangoValidationError
 from django.test import SimpleTestCase
 
 from rest_framework import fields
 from rest_framework.exceptions import ValidationError
 
+from rest_dataclasses.serializers import DataclassSerializer
+
 
 @da.dataclass
 class User:
@@ -232,3 +233,56 @@ class Meta:
 
         with self.assertRaises(ValidationError):
             serializer.save()
+
+    def test_create_star_source(self):
+        class Serializer(DataclassSerializer):
+            class Meta:
+                model = User
+                fields = ["name"]
+
+        class StarSerializer(DataclassSerializer):
+            user = Serializer(source="*")
+
+            class Meta:
+                model = User
+                fields = ["id", "user"]
+
+        serializer = StarSerializer(data={"user": {"name": "shosca"}, "id": 1})
+        serializer.is_valid(raise_exception=True)
+        user = serializer.save()
+
+        self.assertDictEqual(da.asdict(user), {"id": 1, "name": "shosca", "email": None})
+
+    def test_create_source_not_in_validated_data(self):
+        class Serializer(DataclassSerializer):
+            class Meta:
+                model = Line
+                fields = "__all__"
+
+        serializer = Serializer(data={})
+        serializer.is_valid(raise_exception=True)
+        line = serializer.save()
+
+        self.assertDictEqual(da.asdict(line), {"a": None, "b": None})
+
+    def test_validation_error_on_save(self):
+        class Serializer(DataclassSerializer):
+            class Meta:
+                model = User
+                fields = ["name"]
+
+            def perform_update(self, instance, validated_data, errors):
+                raise DjangoValidationError("test")
+
+        class StarSerializer(DataclassSerializer):
+            user = Serializer(source="*")
+
+            class Meta:
+                model = User
+                fields = ["id", "user"]
+
+        serializer = StarSerializer(data={"user": {"name": "shosca"}, "id": 1})
+        serializer.is_valid(raise_exception=True)
+
+        with self.assertRaises(ValidationError):
+            serializer.save()
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..f3805b9
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import, print_function, unicode_literals
+import unittest
+
+from django.core.exceptions import ValidationError
+
+from rest_dataclasses.utils import _django_to_drf
+
+
+class TestUtils(unittest.TestCase):
+    def test_django_to_drf(self):
+        self.assertEqual(_django_to_drf("hello"), "hello")
+        self.assertEqual(_django_to_drf(["hello"]), ["hello"])
+        self.assertEqual(_django_to_drf({"hello": "world"}), {"hello": "world"})
+        self.assertEqual(_django_to_drf(ValidationError("hello")), ["hello"])
+        self.assertEqual(_django_to_drf(ValidationError({"hello": "world"})), {"hello": ["world"]})