diff --git a/tests/test_factory.py b/tests/test_factory.py
new file mode 100644
index 0000000..d858a1d
--- /dev/null
+++ b/tests/test_factory.py
@@ -0,0 +1,63 @@
+from flask import Flask
+from flask_sslify import SSLify
+from pytest import fixture
+
+
+class AppFactoryContext(object):
+
+    def __init__(self):
+        self.sslify = SSLify()
+        self.app = None
+        self.appctx = None
+
+    def __enter__(self):
+        self.app = self.create_app()
+        self.appctx = self.app.app_context()
+        self.appctx.push()
+        return self.appctx
+
+    def __exit__(self, exc_type, exc_value, exc_tb):
+        self.appctx.pop()
+        self.app = None
+        self.appctx = None
+
+    def create_app(self):
+        app = Flask(__name__)
+        app.config['DEBUG'] = False
+        app.config['TESTING'] = False
+        app.config['SERVER_NAME'] = 'example.com'
+        app.config['SSLIFY_PERMANENT'] = True
+        self.sslify.init_app(app)
+        app.add_url_rule('/', 'home', self.view_home)
+        return app
+
+    def view_home(self):
+        return 'home'
+
+
+@fixture
+def app_factory():
+    context = AppFactoryContext()
+    with context:
+        yield context
+
+
+def test_config(app_factory):
+    assert app_factory.sslify.hsts_include_subdomains is False
+    assert app_factory.sslify.permanent is True
+    assert app_factory.sslify.skip_list is None
+
+
+def test_redirection(app_factory):
+    client = app_factory.app.test_client()
+    r = client.get('/')
+    assert r.status_code == 301
+    assert r.headers['Location'] == 'https://example.com/'
+
+
+def test_hsts_header(app_factory):
+    client = app_factory.app.test_client()
+    r = client.get('/', base_url='https://example.com')
+    assert r.status_code == 200
+    assert r.data == 'home'
+    assert r.headers['Strict-Transport-Security'] == 'max-age=31536000'