diff --git a/src/core/DownloadManager.h b/src/core/DownloadManager.h
--- a/src/core/DownloadManager.h
+++ b/src/core/DownloadManager.h
@@ -268,7 +268,7 @@
      */
     Q_INVOKABLE bool areVoicesRegistered() const;
 
-    /*
+    /**
      * Registers a rcc resource file given by a relative resource path
      *
      * @param filename  Relative resource path.
diff --git a/tests/core/CMakeLists.txt b/tests/core/CMakeLists.txt
--- a/tests/core/CMakeLists.txt
+++ b/tests/core/CMakeLists.txt
@@ -13,6 +13,7 @@
               DirectoryTest.cpp
               FileTest.cpp
               ApplicationInfoTest.cpp
+              DownloadManagerTest.cpp
               # add new test file here
               NAME_PREFIX Core
               LINK_LIBRARIES ${CORE_TEST_LIBRARIES})
diff --git a/tests/core/DownloadManagerTest.cpp b/tests/core/DownloadManagerTest.cpp
new file mode 100644
--- /dev/null
+++ b/tests/core/DownloadManagerTest.cpp
@@ -0,0 +1,85 @@
+#include <QObject>
+#include <QtTest>
+#include <QDebug>
+#include <QString>
+
+#include "src/core/DownloadManager.h"
+
+class TestDownloadManager : public QObject
+{
+    Q_OBJECT
+public:
+    explicit TestDownloadManager(QObject *parent = nullptr) : QObject(parent)
+    { }
+private slots:
+    /*!
+     * \brief TestDownloadManager::test_getVoicesResourceForLocale Test the corresponding function
+     */
+    void initTestCase()
+    {
+        subject = DownloadManager::getInstance();
+    }
+    void test_downloadManagerProvider()
+    {
+        QObject * result = DownloadManager::downloadManagerProvider(new QQmlEngine(), new QJSEngine());
+        QVERIFY(result->objectName().isEmpty());
+        // TODO do a better test than this...
+    }
+    void test_getVoicesResourceForLocale()
+    {
+        QCOMPARE(subject->getVoicesResourceForLocale("en_US"), QString("data2/voices-ogg/voices-en.rcc"));
+        QCOMPARE(subject->getVoicesResourceForLocale("en_UK"), QString("data2/voices-ogg/voices-en.rcc"));
+        QCOMPARE(subject->getVoicesResourceForLocale("ru_RU"), QString("data2/voices-ogg/voices-ru.rcc"));
+        QCOMPARE(subject->getVoicesResourceForLocale("de_DE"), QString("data2/voices-ogg/voices-de.rcc"));
+        QCOMPARE(subject->getVoicesResourceForLocale("fr_FR"), QString("data2/voices-ogg/voices-fr.rcc"));
+    }
+    void test_haveLocalResource()
+    {
+        QVERIFY(!subject->haveLocalResource("invalid.invalid"));
+        QVERIFY(!subject->haveLocalResource("no.no"));
+
+        QVERIFY(subject->haveLocalResource("money.rcc"));
+        QVERIFY(subject->haveLocalResource("penalty.rcc"));
+    }
+    void test_downloadResource()
+    {
+        // FIXME always results in true
+        QVERIFY(subject->downloadResource("algorithm.rcc"));
+        QVERIFY(!subject->downloadResource("invalid.blabla"));
+    }
+    void test_updateResource()
+    {
+        // FIXME always results in true
+        QVERIFY(subject->updateResource("money.rcc"));
+        QVERIFY(!subject->updateResource("invalid.haha"));
+    }
+    void test_downloadIsRunning()
+    {
+        subject->abortDownloads();
+        QVERIFY(!subject->downloadIsRunning());
+        QVERIFY(subject->downloadResource("colors.rcc"));
+        QVERIFY(subject->downloadIsRunning());
+        subject->abortDownloads();
+    }
+    void test_registerResource()
+    {
+        QVERIFY(subject->registerResource("money.rcc"));
+        QVERIFY(!subject->registerResource("invalid.rcc"));
+    }
+    void test_isDataRegistered()
+    {
+        // FIXME always results in false (probably, because nothing was registered yet)
+        QVERIFY(subject->isDataRegistered("words"));
+        QVERIFY(!subject->isDataRegistered("invalid"));
+    }
+    void test_areVoicesRegistered()
+    {
+        // FIXME always results in false
+        QVERIFY(subject->areVoicesRegistered());
+    }
+private:
+    DownloadManager * subject;
+};
+
+QTEST_MAIN(TestDownloadManager);
+#include "DownloadManagerTest.moc"