diff --git a/autotests/kpluginloadertest.cpp b/autotests/kpluginloadertest.cpp
--- a/autotests/kpluginloadertest.cpp
+++ b/autotests/kpluginloadertest.cpp
@@ -252,8 +252,8 @@
         // only jsonplugin, since unversionedplugin has no json metadata
         QList<QObject*> plugins = KPluginLoader::instantiatePlugins(temp.path());
         QCOMPARE(plugins.size(), 2);
-        QStringList classNames = QStringList() << plugins[0]->metaObject()->className()
-            << plugins[1]->metaObject()->className();
+        QStringList classNames = QStringList() << QString::fromLatin1(plugins[0]->metaObject()->className())
+            << QString::fromLatin1(plugins[1]->metaObject()->className());
         classNames.sort();
         QCOMPARE(classNames[0], QStringLiteral("jsonplugin2"));
         QCOMPARE(classNames[1], QStringLiteral("jsonpluginfa"));
@@ -295,8 +295,8 @@
         QVERIFY(!QDir::isAbsolutePath(subDirName));
         plugins = KPluginLoader::instantiatePlugins(subDirName);
         QCOMPARE(plugins.size(), 2);
-        classNames = QStringList() << plugins[0]->metaObject()->className()
-            << plugins[1]->metaObject()->className();
+        classNames = QStringList() << QString::fromLatin1(plugins[0]->metaObject()->className())
+            << QString::fromLatin1(plugins[1]->metaObject()->className());
         classNames.sort();
         QCOMPARE(classNames[0], QStringLiteral("jsonplugin2"));
         QCOMPARE(classNames[1], QStringLiteral("jsonpluginfa"));
diff --git a/autotests/kprocesstest.cpp b/autotests/kprocesstest.cpp
--- a/autotests/kprocesstest.cpp
+++ b/autotests/kprocesstest.cpp
@@ -44,9 +44,9 @@
 {
     QProcess p;
     p.setProcessChannelMode(QProcess::MergedChannels);
-    p.start(gargv[0], QStringList() << QString::number(how) << QStringLiteral("--nocrashhandler"));
+    p.start(QString::fromLatin1(gargv[0]), QStringList() << QString::number(how) << QString::fromLatin1("--nocrashhandler"));
     p.waitForFinished();
-    return p.readAllStandardOutput();
+    return QString::fromLatin1(p.readAllStandardOutput());
 }
 
 #define EOUT "foo - stdout"
@@ -58,7 +58,7 @@
 #define EO EOUT "\n"
 #define EE EERR "\n"
 #define TESTCHAN(me,ms,pout,rout,rerr) \
-    e = "mode: " ms "\n" POUT pout ROUT rout RERR rerr; \
+    e = QStringLiteral("mode: " ms "\n" POUT pout ROUT rout RERR rerr); \
     a = "mode: " ms "\n" + recurse(KProcess::me); \
     QCOMPARE(a, e)
 
@@ -85,20 +85,21 @@
 #else
     KProcess p;
 
-    p.setShellCommand("cat");
+    p.setShellCommand(QStringLiteral("cat"));
     QCOMPARE(p.program().count(), 1);
-    QCOMPARE(p.program().at(0), QStandardPaths::findExecutable("cat"));
-    QVERIFY(p.program().at(0).endsWith("/bin/cat"));
-    p.setShellCommand("true || false");
-    QCOMPARE(p.program(), QStringList() << "/bin/sh" << "-c" << "true || false");
+    QCOMPARE(p.program().at(0), QStandardPaths::findExecutable(QStringLiteral("cat")));
+    QVERIFY(p.program().at(0).endsWith(QStringLiteral("/bin/cat")));
+    p.setShellCommand(QStringLiteral("true || false"));
+    QCOMPARE(p.program(), QStringList() << QString::fromLatin1("/bin/sh") << QString::fromLatin1("-c")
+             << QString::fromLatin1("true || false"));
 #endif
 }
 
 static void recursor(char **argv)
 {
     if (argv[1]) {
         KProcess p;
-        p.setShellCommand("echo " EOUT "; echo " EERR " >&2");
+        p.setShellCommand(QString::fromLatin1("echo " EOUT "; echo " EERR " >&2"));
         p.setOutputChannelMode(static_cast<KProcess::OutputChannelMode>(atoi(argv[1])));
         fputs(POUT, stdout);
         fflush(stdout);