diff --git a/tests/auto/corelib/tools/qsharedpointer/externaltests.cpp b/tests/auto/corelib/tools/qsharedpointer/externaltests.cpp
index 1bfa1c10a0..e67bbd93ff 100644
--- a/tests/auto/corelib/tools/qsharedpointer/externaltests.cpp
+++ b/tests/auto/corelib/tools/qsharedpointer/externaltests.cpp
@@ -68,6 +68,9 @@
 static QString makespec()
 {
     static const char default_makespec[] = DEFAULT_MAKESPEC;
+    if (default_makespec[0] == '/')
+        return QString::fromLatin1(default_makespec);
+
     const char *p;
     for (p = default_makespec + sizeof(default_makespec) - 1; p >= default_makespec; --p)
         if (*p == '/' || *p == '\\')
diff --git a/tests/auto/corelib/tools/qsharedpointer/qsharedpointer.pro b/tests/auto/corelib/tools/qsharedpointer/qsharedpointer.pro
index fc791f485c..014006e782 100644
--- a/tests/auto/corelib/tools/qsharedpointer/qsharedpointer.pro
+++ b/tests/auto/corelib/tools/qsharedpointer/qsharedpointer.pro
@@ -13,5 +13,3 @@ QT = core
 
 include(externaltests.pri)
 CONFIG += parallel_test
-
-CONFIG += insignificant_test # QTBUG-21402