diff --git a/rest/rest/settings.py b/rest/rest/settings.py
index 14ed63e..d8b0201 100644
--- a/rest/rest/settings.py
+++ b/rest/rest/settings.py
@@ -87,10 +87,21 @@
             'options': '-c search_path=archive,public'
         }
     },
-    'sqlite': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': BASE_DIR / 'db.sqlite3',
-    }
+    #'sqlite': {
+    #    'ENGINE': 'django.db.backends.sqlite3',
+    #    'NAME': BASE_DIR / 'db.sqlite3',
+    #},
+    #'TEST': {
+    #    'ENGINE': 'django.db.backends.postgresql_psycopg2',
+    #    'NAME': 'postgres',
+    #    'USER': 'postgres',
+    #    'PASSWORD': 'geheim',
+    #    'HOST': '127.0.0.1',
+    #    'PORT': '6543',
+    #    'OPTIONS': {  # set schema
+    #        'options': '-c search_path=archive,public'
+    #    }
+    #},
 }
 
 
diff --git a/rest/rest_api/serializers.py b/rest/rest_api/serializers.py
index a188aba..d33c9ca 100644
--- a/rest/rest_api/serializers.py
+++ b/rest/rest_api/serializers.py
@@ -1,4 +1,3 @@
-from pip._internal.cli.cmdoptions import list_exclude
 from rest_framework import serializers
 
 from .models import Document
diff --git a/rest/rest_api/test/__init__.py b/rest/rest_api/test/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/rest/rest_api/test/test_db_access.py b/rest/rest_api/test/test_db_access.py
new file mode 100644
index 0000000..e18226c
--- /dev/null
+++ b/rest/rest_api/test/test_db_access.py
@@ -0,0 +1,10 @@
+import pytest
+
+from rest_api.models import Document
+
+
+# testsuite creates own test-database
+@pytest.mark.django_db(databases=['default'])
+def test_get_all_docs(client):
+    documents = Document.objects.all()
+    assert documents.count() == 0
diff --git a/rest/rest_api/test/test_hello_world.py b/rest/rest_api/test/test_hello_world.py
new file mode 100644
index 0000000..f02dbfc
--- /dev/null
+++ b/rest/rest_api/test/test_hello_world.py
@@ -0,0 +1,6 @@
+import pytest
+
+
+@pytest.mark.unit
+def test_hello_world():
+    assert 'hello_world' == 'hello_world'
diff --git a/rest/rest_api/test/test_rest.py b/rest/rest_api/test/test_rest.py
new file mode 100644
index 0000000..8b68f79
--- /dev/null
+++ b/rest/rest_api/test/test_rest.py
@@ -0,0 +1 @@
+#todo
\ No newline at end of file
diff --git a/rest/rest_api/test/test_serializer.py b/rest/rest_api/test/test_serializer.py
new file mode 100644
index 0000000..75deab5
--- /dev/null
+++ b/rest/rest_api/test/test_serializer.py
@@ -0,0 +1,19 @@
+import pytest
+
+from rest_api.serializers import DocumentSerializer
+
+
+@pytest.mark.unit
+def test_valid_model():
+    document_serializer = DocumentSerializer(data={"title": "pytest",
+                                                   "person": "python3",
+                                                   "file_size": -2048})
+    assert document_serializer.is_valid() == True
+
+
+@pytest.mark.unit
+def test_invalid_model():
+    document_serializer = DocumentSerializer(data={"title": "pytest",
+                                                   "person": 204,
+                                                   "file_size": "fake number"})
+    assert document_serializer.is_valid() == False