diff --git a/.ci/test_blocklist_qt6.txt b/.ci/test_blocklist_qt6.txt
index 631ff64eda1..8d78a8493b3 100644
--- a/.ci/test_blocklist_qt6.txt
+++ b/.ci/test_blocklist_qt6.txt
@@ -9,7 +9,6 @@ test_core_geometry
 test_core_labelingengine
 test_core_layoutpicture
 test_core_maprendererjob
-test_core_networkaccessmanager
 test_core_ogcutils
 test_core_tiledownloadmanager
 test_core_vectortilelayer
diff --git a/src/core/qgsapplication.cpp b/src/core/qgsapplication.cpp
index b174ed8921e..b2234a320fd 100644
--- a/src/core/qgsapplication.cpp
+++ b/src/core/qgsapplication.cpp
@@ -111,6 +111,7 @@
 #include <QRegularExpression>
 #include <QTextStream>
 #include <QScreen>
+#include <QAuthenticator>
 #if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
 #include <QRecursiveMutex>
 #endif
@@ -318,6 +319,7 @@ void QgsApplication::init( QString profileFolder )
     qRegisterMetaType<QMap<QNetworkRequest::Attribute, QVariant>>( "QMap<QNetworkRequest::Attribute,QVariant>" );
     qRegisterMetaType<QMap<QNetworkRequest::KnownHeaders, QVariant>>( "QMap<QNetworkRequest::KnownHeaders,QVariant>" );
     qRegisterMetaType<QList<QNetworkReply::RawHeaderPair>>( "QList<QNetworkReply::RawHeaderPair>" );
+    qRegisterMetaType< QAuthenticator * >( "QAuthenticator*" );
   } );
 
   ( void ) resolvePkgPath();