diff --git a/src/corelib/kernel/qtestsupport_core.cpp b/src/corelib/kernel/qtestsupport_core.cpp
index e6e3dfbd69b..02dd5ad04d7 100644
--- a/src/corelib/kernel/qtestsupport_core.cpp
+++ b/src/corelib/kernel/qtestsupport_core.cpp
@@ -45,6 +45,35 @@
 
 QT_BEGIN_NAMESPACE
 
+/*!
+    Sleeps for \a ms milliseconds, blocking execution of the
+    test. qSleep() will not do any event processing and leave your test
+    unresponsive. Network communication might time out while
+    sleeping. Use \l {QTest::qWait()} to do non-blocking sleeping.
+
+    \a ms must be greater than 0.
+
+    \b {Note:} The qSleep() function calls either \c nanosleep() on
+    unix or \c Sleep() on windows, so the accuracy of time spent in
+    qSleep() depends on the operating system.
+
+    Example:
+    \snippet code/src_qtestlib_qtestcase.cpp 23
+
+    \sa {QTest::qWait()}
+*/
+Q_CORE_EXPORT void QTest::qSleep(int ms)
+{
+    Q_ASSERT(ms > 0);
+
+#if defined(Q_OS_WIN)
+    Sleep(uint(ms));
+#else
+    struct timespec ts = { time_t(ms / 1000), (ms % 1000) * 1000 * 1000 };
+    nanosleep(&ts, nullptr);
+#endif
+}
+
 /*! \fn template <typename Functor> bool QTest::qWaitFor(Functor predicate, int timeout)
 
     Waits for \a timeout milliseconds or until the \a predicate returns true.
diff --git a/src/corelib/kernel/qtestsupport_core.h b/src/corelib/kernel/qtestsupport_core.h
index 03430d7680f..2abe70bf993 100644
--- a/src/corelib/kernel/qtestsupport_core.h
+++ b/src/corelib/kernel/qtestsupport_core.h
@@ -48,6 +48,8 @@ QT_BEGIN_NAMESPACE
 
 namespace QTest {
 
+Q_CORE_EXPORT void qSleep(int ms);
+
 template <typename Functor>
 Q_REQUIRED_RESULT static bool qWaitFor(Functor predicate, int timeout = 5000)
 {
@@ -75,7 +77,7 @@ Q_REQUIRED_RESULT static bool qWaitFor(Functor predicate, int timeout = 5000)
 
         remaining = int(deadline.remainingTime());
         if (remaining > 0)
-            QThread::msleep(qMin(10, remaining));
+            qSleep(qMin(10, remaining));
 
         if (predicate())
             return true;
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index c2b33019b27..0202915e678 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -2474,24 +2474,6 @@ bool QTest::currentTestFailed()
     return QTestResult::currentTestFailed();
 }
 
-/*!
-    Sleeps for \a ms milliseconds, blocking execution of the
-    test. qSleep() will not do any event processing and leave your test
-    unresponsive. Network communication might time out while
-    sleeping. Use \l {QTest::qWait()} to do non-blocking sleeping.
-
-    \a ms must be greater than 0.
-
-    \b {Note:} The qSleep() function calls either \c nanosleep() on
-    unix or \c Sleep() on windows, so the accuracy of time spent in
-    qSleep() depends on the operating system.
-
-    Example:
-    \snippet code/src_qtestlib_qtestcase.cpp 23
-
-    \sa {QTest::qWait()}
-*/
-
 /*! \internal
  */
 QObject *QTest::testObject()
diff --git a/src/testlib/qtestcase.h b/src/testlib/qtestcase.h
index 6fe962277a5..e6a2b01c958 100644
--- a/src/testlib/qtestcase.h
+++ b/src/testlib/qtestcase.h
@@ -336,7 +336,6 @@ namespace QTest
                                          char *val1, char *val2,
                                          const char *actual, const char *expected,
                                          const char *file, int line);
-    inline void qSleep(int ms) { QThread::msleep(ms); }
     Q_TESTLIB_EXPORT void addColumnInternal(int id, const char *name);
 
     template <typename T>