diff --git a/simplecrud/__init__.py b/simplecrud/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/simplecrud/tests/__init__.py b/simplecrud/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/simplecrud/tests/test_settings.py b/simplecrud/tests/test_settings.py
new file mode 100644
index 0000000..e02d76c
--- /dev/null
+++ b/simplecrud/tests/test_settings.py
@@ -0,0 +1,20 @@
+import unittest
+
+from simplecrud.settings import CRUDConfig
+
+
+class TestCRUDConfig(unittest.TestCase):
+    def test_singleton(self):
+        config1 = CRUDConfig()
+        config2 = CRUDConfig()
+        self.assertEqual(config1, config2)
+
+    def test_set_sessionmaker(self):
+        config = CRUDConfig()
+        config.set_sessionmaker("test")
+        self.assertEqual(config.sessionmaker, "test")
+
+    def test_get_sessionmaker(self):
+        config = CRUDConfig()
+        with self.assertRaises(ValueError):
+            config.sessionmaker