diff --git a/tests/test_factory.py b/tests/test_factory.py
new file mode 100644
index 0000000..4dc9abf
--- /dev/null
+++ b/tests/test_factory.py
@@ -0,0 +1,9 @@
+from period import create_app
+
+def test_config():
+    assert not create_app().testing
+    assert create_app({'TESTING': True}).testing
+
+def test_hello(client):
+    response = client.get('/hello')
+    assert response.data == b'Hello, World!'
\ No newline at end of file