diff --git a/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp b/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
index f42637a3fe1..772b3f827fc 100644
--- a/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
+++ b/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
@@ -59,6 +59,7 @@ private slots:
     void objectCastStdSharedPtr();
     void differentPointers();
     void virtualBaseDifferentPointers();
+    void virtualBaseWeakPointerConversions();
 #ifndef QTEST_NO_RTTI
     void dynamicCast();
     void dynamicCastDifferentPointers();
@@ -1294,6 +1295,67 @@ void tst_QSharedPointer::virtualBaseDifferentPointers()
     safetyCheck();
 }
 
+void tst_QSharedPointer::virtualBaseWeakPointerConversions()
+{
+    struct Base { virtual ~Base() = default; };
+    struct Derived : virtual Base {};
+
+    {
+        QSharedPointer<Derived> d(new Derived);
+        QSharedPointer<const Base> cb = d;
+        QCOMPARE(cb, d);
+        QCOMPARE(cb.get(), d.get());
+    }
+    safetyCheck();
+
+    {
+        QSharedPointer<Derived> d(new Derived);
+        QWeakPointer<const Base> wcb = d;
+        QCOMPARE(wcb, d);
+        QCOMPARE(wcb.lock().get(), d.get());
+    }
+    safetyCheck();
+
+    {
+        QSharedPointer<Derived> d(new Derived);
+        QWeakPointer<Derived> wd = d;
+        QCOMPARE(wd, d);
+        QCOMPARE(wd.lock().get(), d.get());
+        QWeakPointer<const Base> wcb = wd;
+        QCOMPARE(wcb, wd);
+        QCOMPARE(wcb.lock().get(), d.get());
+    }
+    safetyCheck();
+
+    {
+        auto raw = new Derived;
+        QSharedPointer<Derived> d(raw);
+        QSharedPointer<const Base> cb = std::move(d);
+        QCOMPARE(d, nullptr);
+        QCOMPARE(cb.get(), raw);
+    }
+    safetyCheck();
+
+    {
+        QSharedPointer<Derived> d(new Derived);
+        QWeakPointer<const Base> wcb = std::move(d);
+        QCOMPARE(wcb, d);
+        QCOMPARE(wcb.lock().get(), d.get());
+    }
+    safetyCheck();
+
+    {
+        QSharedPointer<Derived> d(new Derived);
+        QWeakPointer<Derived> wd = std::move(d);
+        QCOMPARE(wd, d);
+        QCOMPARE(wd.lock().get(), d.get());
+        QWeakPointer<const Base> wcb = std::move(wd);
+        QCOMPARE(wd, nullptr);
+        QCOMPARE(wcb.lock().get(), d.get());
+    }
+    safetyCheck();
+}
+
 #ifndef QTEST_NO_RTTI
 void tst_QSharedPointer::dynamicCast()
 {