diff --git a/tests/auto/corelib/io/qdir/tst_qdir.cpp b/tests/auto/corelib/io/qdir/tst_qdir.cpp
index 34588b19bc8..b703a8839f7 100644
--- a/tests/auto/corelib/io/qdir/tst_qdir.cpp
+++ b/tests/auto/corelib/io/qdir/tst_qdir.cpp
@@ -2045,7 +2045,7 @@ void tst_QDir::detachingOperations()
         QCOMPARE(dir2.nameFilters(), nameFilters);
         QCOMPARE(dir2.sorting(), sorting);
 
-        dir2 = path1;
+        dir2.setPath(path1);
         QCOMPARE(dir2.path(), path1);
         QCOMPARE(dir2.filter(), filter);
         QCOMPARE(dir2.nameFilters(), nameFilters);