diff --git a/tests/auto/corelib/io/qurl/tst_qurl.cpp b/tests/auto/corelib/io/qurl/tst_qurl.cpp
index 7872ac1d88..c4bbe634c9 100644
--- a/tests/auto/corelib/io/qurl/tst_qurl.cpp
+++ b/tests/auto/corelib/io/qurl/tst_qurl.cpp
@@ -2081,8 +2081,9 @@ void tst_QUrl::hasQuery()
 
 void tst_QUrl::nameprep()
 {
-    QUrl url(QString::fromUtf8("http://www.fu""\xc3""\x9f""ball.de/"));
-    QCOMPARE(url.toString(), QString::fromLatin1("http://www.fussball.de/"));
+    // U+FB01 LATIN SMALL LIGATURE FI
+    QUrl url(u"http://www.\uFB01le.de/"_qs);
+    QCOMPARE(url.toString(), QStringLiteral(u"http://www.file.de/"));
 }
 
 void tst_QUrl::isValid()
diff --git a/tests/auto/corelib/io/qurlinternal/tst_qurlinternal.cpp b/tests/auto/corelib/io/qurlinternal/tst_qurlinternal.cpp
index 5380fe17f4..6c556f1f25 100644
--- a/tests/auto/corelib/io/qurlinternal/tst_qurlinternal.cpp
+++ b/tests/auto/corelib/io/qurlinternal/tst_qurlinternal.cpp
@@ -258,8 +258,9 @@ void tst_QUrlInternal::ace_testsuite_data()
     QTest::newRow("ascii-mixed") << "FLuke" << "fluke" << "fluke" << "fluke";
     QTest::newRow("ascii-upper") << "FLUKE" << "fluke" << "fluke" << "fluke";
 
-    QTest::newRow("asciifolded") << QString::fromLatin1("stra\337e") << "strasse" << "." << "strasse";
-    QTest::newRow("asciifolded-dotcom") << QString::fromLatin1("stra\337e.example.com") << "strasse.example.com" << "." << "strasse.example.com";
+    // U+FB01 LATIN SMALL LIGATURE FI
+    QTest::newRow("asciifolded") << u"\uFB01le"_qs << "file" << "." << "file";
+    QTest::newRow("asciifolded-dotcom") << u"\uFB01le.example.com"_qs << "file.example.com" << "." << "file.example.com";
     QTest::newRow("greek-mu") << QString::fromLatin1("\265V")
                               <<"xn--v-lmb"
                               << "."