1 files changed, 16 insertions, 0 deletions
diff --git a/tests/auto/network/ssl/qdtls/tst_qdtls.cpp b/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
index 1fc46ca36a..b80ca8593b 100644
--- a/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
+++ b/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
@@ -40,10 +40,13 @@
 #include <QtNetwork/qssl.h>
 
 #include <QtCore/qcryptographichash.h>
+#include <QtCore/qscopeguard.h>
 #include <QtCore/qbytearray.h>
 #include <QtCore/qvector.h>
+#include <QtCore/qobject.h>
 #include <QtCore/qstring.h>
 #include <QtCore/qobject.h>
+#include <QtCore/qlist.h>
 
 #include <algorithm>
 
@@ -312,6 +315,19 @@ void tst_QDtls::configuration()
         QCOMPARE(dtls.dtlsError(), QDtlsError::InvalidOperation);
         QCOMPARE(dtls.dtlsConfiguration(), config);
     }
+
+    static bool doneAlready = false;
+    if (!doneAlready) {
+        doneAlready = true;
+        QSslConfiguration nullConfig;
+        const auto defaultDtlsConfig = QSslConfiguration::defaultDtlsConfiguration();
+        const auto restoreDefault = qScopeGuard([&defaultDtlsConfig] {
+            QSslConfiguration::setDefaultDtlsConfiguration(defaultDtlsConfig);
+        });
+        QSslConfiguration::setDefaultDtlsConfiguration(nullConfig);
+        QCOMPARE(QSslConfiguration::defaultDtlsConfiguration(), nullConfig);
+        QVERIFY(QSslConfiguration::defaultDtlsConfiguration() != defaultDtlsConfig);
+    }
 }
 
 void tst_QDtls::invalidConfiguration()