diff --git a/tests/auto/corelib/text/qstringlist/tst_qstringlist.cpp b/tests/auto/corelib/text/qstringlist/tst_qstringlist.cpp
index a6fe866797..844a228e62 100644
--- a/tests/auto/corelib/text/qstringlist/tst_qstringlist.cpp
+++ b/tests/auto/corelib/text/qstringlist/tst_qstringlist.cpp
@@ -427,6 +427,11 @@ void tst_QStringList::joinChar_data() const
                         << QLatin1String("c"))
                 << QChar(QLatin1Char(' '))
                 << QString("a b c");
+
+    QTest::newRow("null separator")
+            << QStringList{QStringLiteral("a"), QStringLiteral("b"), QStringLiteral("c")}
+            << QChar(u'\0')
+            << QStringLiteral("a\0b\0c");
 }
 
 void tst_QStringList::joinEmptiness() const