diff --git a/tests/auto/corelib/io/qfile/tst_qfile.cpp b/tests/auto/corelib/io/qfile/tst_qfile.cpp
index 188e3fdc25..67a8d66963 100644
--- a/tests/auto/corelib/io/qfile/tst_qfile.cpp
+++ b/tests/auto/corelib/io/qfile/tst_qfile.cpp
@@ -1766,7 +1766,7 @@ void tst_QFile::largeUncFileSupport()
         // Retry in case of sharing violation
         QTRY_VERIFY(fOpen(largeFileEncoded, "rb", &fhF));
         StdioFileGuard fh(fhF);
-        int fd = int(_fileno(fh));
+        int fd = int(QT_FILENO(fh));
         QFile file;
         QVERIFY(file.open(fd, QIODevice::ReadOnly));
         QCOMPARE(file.size(), size);
@@ -2854,8 +2854,8 @@ void tst_QFile::handle()
     StdioFileGuard fp(fopen(qPrintable(m_testSourceFile), "r"));
     QVERIFY(fp);
     file2.open(fp, QIODevice::ReadOnly);
-    QCOMPARE(int(file2.handle()), int(fileno(fp)));
-    QCOMPARE(int(file2.handle()), int(fileno(fp)));
+    QCOMPARE(int(file2.handle()), int(QT_FILENO(fp)));
+    QCOMPARE(int(file2.handle()), int(QT_FILENO(fp)));
     fp.close();
 
     //test round trip of adopted posix file handle
diff --git a/tests/auto/corelib/io/qsettings/tst_qsettings.cpp b/tests/auto/corelib/io/qsettings/tst_qsettings.cpp
index 732d81d84a..621214452b 100644
--- a/tests/auto/corelib/io/qsettings/tst_qsettings.cpp
+++ b/tests/auto/corelib/io/qsettings/tst_qsettings.cpp
@@ -57,8 +57,10 @@
 #if defined(Q_OS_WIN)
 #include <QtCore/qt_windows.h>
 #include <private/qwinregistry_p.h>
+#define QT_UNLINK _unlink
 #else
 #include <unistd.h>
+#define QT_UNLINK unlink
 #endif
 
 #if defined(Q_OS_DARWIN)
@@ -1736,7 +1738,7 @@ void tst_QSettings::sync()
 
     // Now "some other app" will change other.software.org.ini
     QString userConfDir = settingsPath("__user__") + QDir::separator();
-    unlink((userConfDir + "other.software.org.ini").toLatin1());
+    QT_UNLINK((userConfDir + "other.software.org.ini").toLatin1());
     rename((userConfDir + "software.org.ini").toLatin1(),
            (userConfDir + "other.software.org.ini").toLatin1());