diff --git a/tests/test_site/auth.py b/tests/test_site/auth.py
index bb3ff21..577e1ec 100644
--- a/tests/test_site/auth.py
+++ b/tests/test_site/auth.py
@@ -17,8 +17,10 @@
 """The authentication for the Mia! Accounting demonstration website.
 
 """
+import typing as t
+
 from flask import Blueprint, render_template, Flask, redirect, url_for, \
-    session, request, g, Response
+    session, request, g, Response, abort
 
 from . import db
 
@@ -93,6 +95,31 @@ def current_user() -> User | None:
     return g.user
 
 
+def admin_required(view: t.Callable) -> t.Callable:
+    """The view decorator to require the user to be an administrator.
+
+    :param view: The view.
+    :return: The decorated view.
+    """
+
+    def decorated_view(*args, **kwargs):
+        """The decorated view that tests against a permission rule.
+
+        :param args: The arguments of the view.
+        :param kwargs: The keyword arguments of the view.
+        :return: The response of the view.
+        :raise Forbidden: When the user is denied.
+        """
+        from accounting.utils.next_uri import append_next
+        if "user" not in session:
+            return redirect(append_next(url_for("auth.login")))
+        if session["user"] != "admin":
+            abort(403)
+        return view(*args, **kwargs)
+
+    return decorated_view
+
+
 def init_app(app: Flask) -> None:
     """Initialize the localization.
 
diff --git a/tests/test_site/reset.py b/tests/test_site/reset.py
index 0dc6cf0..b3eb1b3 100644
--- a/tests/test_site/reset.py
+++ b/tests/test_site/reset.py
@@ -23,8 +23,8 @@ from flask import Flask, Blueprint, url_for, flash, redirect, session, \
     render_template, current_app
 from flask_babel import lazy_gettext
 
-from accounting.utils.cast import s
 from . import db
+from .auth import admin_required
 from .lib import Accounts, JournalEntryLineItemData, JournalEntryData, \
     JournalEntryCurrencyData, BaseTestData
 
@@ -32,6 +32,7 @@ bp: Blueprint = Blueprint("reset", __name__, url_prefix="/")
 
 
 @bp.get("reset", endpoint="reset-page")
+@admin_required
 def reset() -> str:
     """Resets the sample data.
 
@@ -41,11 +42,13 @@ def reset() -> str:
 
 
 @bp.post("sample", endpoint="sample")
+@admin_required
 def reset_sample() -> redirect:
     """Resets the sample data.
 
     :return: Redirection to the accounting application.
     """
+    from accounting.utils.cast import s
     __reset_database()
     SampleData(current_app, "editor").populate()
     flash(s(lazy_gettext(
@@ -54,11 +57,13 @@ def reset_sample() -> redirect:
 
 
 @bp.post("reset", endpoint="clean-up")
+@admin_required
 def clean_up() -> redirect:
     """Clean-up the database data.
 
     :return: Redirection to the accounting application.
     """
+    from accounting.utils.cast import s
     __reset_database()
     flash(s(lazy_gettext("The database is emptied successfully.")), "success")
     return redirect(url_for("accounting-report.default"))