diff --git a/tests/auto/corelib/tools/collections/tst_collections.cpp b/tests/auto/corelib/tools/collections/tst_collections.cpp
index b911be3ffb6..2a8b2649981 100644
--- a/tests/auto/corelib/tools/collections/tst_collections.cpp
+++ b/tests/auto/corelib/tools/collections/tst_collections.cpp
@@ -1370,7 +1370,7 @@ void tst_Collections::hash()
     {
         typedef QHash<QString, QString> Hash;
         Hash hash;
-        QString key;
+        QString key = QLatin1String("  ");
         for (int i = 0; i < 10; ++i) {
             key[0] = i + '0';
             for (int j = 0; j < 10; ++j) {
diff --git a/tests/auto/corelib/tools/qhash/tst_qhash.cpp b/tests/auto/corelib/tools/qhash/tst_qhash.cpp
index d70d488e961..f0aaad98bd2 100644
--- a/tests/auto/corelib/tools/qhash/tst_qhash.cpp
+++ b/tests/auto/corelib/tools/qhash/tst_qhash.cpp
@@ -273,7 +273,7 @@ void tst_QHash::insert1()
     {
         typedef QHash<QString, QString> Hash;
         Hash hash;
-        QString key;
+        QString key = QLatin1String("  ");
         for (int i = 0; i < 10; ++i) {
             key[0] = i + '0';
             for (int j = 0; j < 10; ++j) {