diff --git a/django/contrib/auth/decorators.py b/django/contrib/auth/decorators.py
index 0fc9f3754a..11518193e7 100644
--- a/django/contrib/auth/decorators.py
+++ b/django/contrib/auth/decorators.py
@@ -24,7 +24,9 @@ def user_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIE
             if test_func(request.user):
                 return view_func(request, *args, **kwargs)
             path = request.build_absolute_uri()
-            resolved_login_url = resolve_url(login_url or settings.LOGIN_URL)
+            # urlparse chokes on lazy objects in Python 3, force to str
+            resolved_login_url = force_str(
+                resolve_url(login_url or settings.LOGIN_URL))
             # If the login url is the same scheme and net location then just
             # use the path as the "next" url.
             login_scheme, login_netloc = urlparse(resolved_login_url)[:2]
@@ -33,7 +35,8 @@ def user_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIE
                 (not login_netloc or login_netloc == current_netloc)):
                 path = request.get_full_path()
             from django.contrib.auth.views import redirect_to_login
-            return redirect_to_login(path, login_url, redirect_field_name)
+            return redirect_to_login(
+                path, resolved_login_url, redirect_field_name)
         return _wrapped_view
     return decorator