Reordered the code in the test cases.

tests/test_auth.py

@@ -40,6 +40,13 @@ class AuthenticationTestCase(TestCase):
 
         :return: The Flask application.
         """
+        app: Flask = Flask(__name__)
+        app.config.from_mapping({
+            "SECRET_KEY": token_urlsafe(32),
+            "TESTING": True
+        })
+        app.test_client_class = Client
+
         auth: DigestAuth = DigestAuth(realm=_REALM)
         user_db: t.Dict[str, str] \
             = {_USERNAME: make_password_hash(_REALM, _USERNAME, _PASSWORD)}
@@ -63,13 +70,6 @@ class AuthenticationTestCase(TestCase):
             return SimpleNamespace(username=username) if username in user_db \
                 else None
 
-        app: Flask = Flask(__name__)
-        app.config.from_mapping({
-            "SECRET_KEY": token_urlsafe(32),
-            "TESTING": True
-        })
-        app.test_client_class = Client
-
         @app.get("/login-required-1/auth", endpoint="auth-1")
         @auth.login_required
         def login_required_1() -> str: