diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -25,6 +25,7 @@
    Directory.h
    DownloadManager.cpp
    DownloadManager.h
+   TestDownloadManager.cpp
    GComprisPlugin.cpp
    GComprisPlugin.h
    main.cpp
@@ -263,6 +264,10 @@
 set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/COPYING")
 set(CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/README")
 
+find_package(Qt5Test REQUIRED)
+enable_testing(true)
+add_test(gcompris-qt TestDownloadManager.cpp)
+
 if(WIN32)
   set(CPACK_PACKAGE_INSTALL_DIRECTORY "${GCOMPRIS_EXECUTABLE_NAME}-Qt")
   set(CPACK_PACKAGE_INSTALL_REGISTRY_KEY "${GCOMPRIS_EXECUTABLE_NAME}-Qt")
diff --git a/src/core/TestDownloadManager.cpp b/src/core/TestDownloadManager.cpp
new file mode 100644
--- /dev/null
+++ b/src/core/TestDownloadManager.cpp
@@ -0,0 +1,59 @@
+#include "DownloadManager.h"
+#include <QObject>
+#include <QDebug>
+
+// FIXME Each of includes below result in errors.
+// #include <QtTest/QTest>
+// #include <QtTest/QtTest>
+// #include <QTest>
+
+class TestDownloadManager : public QObject
+{
+    Q_OBJECT
+public:
+    explicit TestDownloadManager(QObject *parent = nullptr);
+    static void Test();
+
+private slots:
+    void initTestCase();
+
+    void test_getVoicesResourceForLocale();
+private:
+    DownloadManager * testSubject;
+};
+
+
+TestDownloadManager::TestDownloadManager(QObject *parent) : QObject(parent)
+{ }
+/*!
+ * \brief TestDownloadManager::Test Small static function for testing without qt test.
+ */
+void TestDownloadManager::Test()
+{
+    TestDownloadManager * myTest = new TestDownloadManager();
+
+    myTest->initTestCase();
+    myTest->test_getVoicesResourceForLocale();
+}
+/*!
+ * \brief TestDownloadManager::initTestCase Test if downloadmanager works at all
+ */
+void TestDownloadManager::initTestCase()
+{
+    testSubject = DownloadManager::getInstance();
+}
+/*!
+ * \brief TestDownloadManager::test_getVoicesResourceForLocale Test the corresponding function
+ */
+void TestDownloadManager::test_getVoicesResourceForLocale()
+{
+    // We will replace qDebug to QCOMPARE as shown below, currently it doesn't work, due to the lack of QTest
+    //QCOMPARE(testSubject->getVoicesResourceForLocale("en_US"), ...);
+    qDebug() << "***: " + testSubject->getVoicesResourceForLocale("ru_RU");
+    qDebug() << "***: " + testSubject->getVoicesResourceForLocale("en_US");
+    qDebug() << "***: " + testSubject->getVoicesResourceForLocale("en_UK");
+}
+// FIXME Also results in errors.
+
+//QTEST_MAIN(TestDownloadManager);
+//#include "TestDownloadManager.moc"
diff --git a/src/core/main.cpp b/src/core/main.cpp
--- a/src/core/main.cpp
+++ b/src/core/main.cpp
@@ -35,6 +35,11 @@
 #include "ActivityInfoTree.h"
 #include "DownloadManager.h"
 
+#include "TestDownloadManager.cpp"
+//#include <QtTest/QTest>
+//#include <QtTest/QtTest>
+//#include <QTest>
+
 bool loadAndroidTranslation(QTranslator &translator, const QString &locale)
 {
     QFile file("assets:/share/GCompris/gcompris_" + locale + ".qm");
@@ -253,6 +258,10 @@
 #endif
 
     QQmlApplicationEngine engine(QUrl("qrc:/gcompris/src/core/main.qml"));
+    // Test the DownloadManager
+    // QTest::qExec(new TestDownloadManager, argc, argv);
+    TestDownloadManager::Test();
+
     QObject::connect(&engine, &QQmlApplicationEngine::quit, DownloadManager::getInstance(),
                      &DownloadManager::shutdown);
     // add import path for shipped qml modules: