diff --git a/src/cmd/cmd.cpp b/src/cmd/cmd.cpp
index cae496780074f..0b852625414cc 100644
--- a/src/cmd/cmd.cpp
+++ b/src/cmd/cmd.cpp
@@ -315,7 +315,7 @@ int main(int argc, char **argv)
 
 #ifdef Q_OS_WIN
     // Ensure OpenSSL config file is only loaded from app directory
-    QString opensslConf = QCoreApplication::applicationDirPath() + QString("/openssl.cnf");
+    QString opensslConf = QCoreApplication::applicationDirPath() + QStringLiteral("/openssl.cnf");
     qputenv("OPENSSL_CONF", opensslConf.toLocal8Bit());
 #endif
 
diff --git a/src/gui/application.cpp b/src/gui/application.cpp
index f05f222a351bf..68bcdc1d233ba 100644
--- a/src/gui/application.cpp
+++ b/src/gui/application.cpp
@@ -235,7 +235,7 @@ Application::Application(int &argc, char **argv)
 
 #ifdef Q_OS_WIN
     // Ensure OpenSSL config file is only loaded from app directory
-    QString opensslConf = QCoreApplication::applicationDirPath() + QString("/openssl.cnf");
+    QString opensslConf = QCoreApplication::applicationDirPath() + QStringLiteral("/openssl.cnf");
     qputenv("OPENSSL_CONF", opensslConf.toLocal8Bit());
 
     // Set up event listener for Windows theme changing
diff --git a/src/gui/cloudproviders/cloudproviderwrapper.cpp b/src/gui/cloudproviders/cloudproviderwrapper.cpp
index 4ff2313c44cc1..39d24b7956f5b 100644
--- a/src/gui/cloudproviders/cloudproviderwrapper.cpp
+++ b/src/gui/cloudproviders/cloudproviderwrapper.cpp
@@ -36,7 +36,7 @@ CloudProviderWrapper::CloudProviderWrapper(QObject *parent, Folder *folder, int
 {
     GMenuModel *model = nullptr;
     GActionGroup *action_group = nullptr;
-    QString accountName = QString("Folder/%1").arg(folderId);
+    QString accountName = QStringLiteral("Folder/%1").arg(folderId);
 
     _cloudProvider = CLOUD_PROVIDERS_PROVIDER_EXPORTER(cloudprovider);
     _cloudProviderAccount = cloud_providers_account_exporter_new(_cloudProvider, accountName.toUtf8().data());
@@ -170,7 +170,7 @@ void CloudProviderWrapper::slotUpdateProgress(const QString &folder, const Progr
 
 void CloudProviderWrapper::updateStatusText(QString statusText)
 {
-    QString status = QString("%1 - %2").arg(_folder->accountState()->stateString(_folder->accountState()->state()), statusText);
+    QString status = QStringLiteral("%1 - %2").arg(_folder->accountState()->stateString(_folder->accountState()->state()), statusText);
     cloud_providers_account_exporter_set_status_details(_cloudProviderAccount, status.toUtf8().data());
 }
 
diff --git a/src/gui/creds/flow2auth.cpp b/src/gui/creds/flow2auth.cpp
index f90873dbc6793..b3cc7c937ac41 100644
--- a/src/gui/creds/flow2auth.cpp
+++ b/src/gui/creds/flow2auth.cpp
@@ -198,7 +198,7 @@ void Flow2Auth::slotPollTimerTimeout()
     req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
 
     auto requestBody = new QBuffer;
-    QUrlQuery arguments(QString("token=%1").arg(_pollToken));
+    QUrlQuery arguments(QStringLiteral("token=%1").arg(_pollToken));
     requestBody->setData(arguments.query(QUrl::FullyEncoded).toLatin1());
 
     auto job = _account->sendRequest("POST", _pollEndpoint, req, requestBody);
diff --git a/src/gui/filedetails/sharemodel.cpp b/src/gui/filedetails/sharemodel.cpp
index 2a314c3faec65..1bcb5dc06f3b9 100644
--- a/src/gui/filedetails/sharemodel.cpp
+++ b/src/gui/filedetails/sharemodel.cpp
@@ -752,7 +752,7 @@ QString ShareModel::avatarUrlForShare(const SharePtr &share) const
         const auto provider = QStringLiteral("image://tray-image-provider/");
         const auto userId = share->getShareWith()->shareWith();
         const auto avatarUrl = Utility::concatUrlPath(_accountState->account()->url(),
-                                                      QString("remote.php/dav/avatars/%1/%2.png").arg(userId, QString::number(64))).toString();
+                                                      QStringLiteral("remote.php/dav/avatars/%1/%2.png").arg(userId, QString::number(64))).toString();
         return QString(provider + avatarUrl);
     }
 
@@ -1403,7 +1403,7 @@ QString ShareModel::generatePassword()
     static const QRegularExpression lowercaseMatch("[a-z]");
     static const QRegularExpression uppercaseMatch("[A-Z]");
     static const QRegularExpression numberMatch("[0-9]");
-    static const QRegularExpression specialCharMatch(QString("[%1]").arg(specialChars.data()));
+    static const QRegularExpression specialCharMatch(QStringLiteral("[%1]").arg(specialChars.data()));
 
     static const std::map<std::string_view, QRegularExpression> matchMap{
         {lowercaseAlphabet, lowercaseMatch},
diff --git a/src/gui/foldercreationdialog.cpp b/src/gui/foldercreationdialog.cpp
index a245c9f4dc461..05158ee9fbf4e 100644
--- a/src/gui/foldercreationdialog.cpp
+++ b/src/gui/foldercreationdialog.cpp
@@ -45,7 +45,7 @@ FolderCreationDialog::FolderCreationDialog(const QString &destination, QWidget *
         ui->newFolderNameEdit->setText(suggestedFolderNamePrefix);
     } else {
         for (unsigned int i = 2; i < std::numeric_limits<unsigned int>::max(); ++i) {
-            const QString suggestedPostfix = QString(" (%1)").arg(i);
+            const QString suggestedPostfix = QStringLiteral(" (%1)").arg(i);
 
             if (!QDir(newFolderFullPath + suggestedPostfix).exists()) {
                 ui->newFolderNameEdit->setText(suggestedFolderNamePrefix + suggestedPostfix);
diff --git a/src/gui/folderstatusmodel.cpp b/src/gui/folderstatusmodel.cpp
index f712cf92cffdc..a06a161a218ef 100644
--- a/src/gui/folderstatusmodel.cpp
+++ b/src/gui/folderstatusmodel.cpp
@@ -219,7 +219,7 @@ QVariant FolderStatusModel::data(const QModelIndex &index, int role) const
         case Qt::DisplayRole:
             if (folderInfo->_hasError) {
                 return {tr("Error while loading the list of folders from the server.")
-                        + QString("\n")
+                        + QStringLiteral("\n")
                         + folderInfo->_lastErrorString};
             } else {
                 return tr("Fetching folder list from server …");
diff --git a/src/gui/ocssharejob.cpp b/src/gui/ocssharejob.cpp
index 2eee30c1ab093..8ec9a71d06baf 100644
--- a/src/gui/ocssharejob.cpp
+++ b/src/gui/ocssharejob.cpp
@@ -33,7 +33,7 @@ void OcsShareJob::getShares(const QString &path, const QMap<QString, QString> &p
     setVerb("GET");
 
     addParam(QString::fromLatin1("path"), path);
-    addParam(QString::fromLatin1("reshares"), QString("true"));
+    addParam(QString::fromLatin1("reshares"), QStringLiteral("true"));
 
     for (auto it = std::cbegin(params); it != std::cend(params); ++it) {
         addParam(it.key(), it.value());
diff --git a/src/gui/remotewipe.cpp b/src/gui/remotewipe.cpp
index 3d285637fb497..7a146ce1bab65 100644
--- a/src/gui/remotewipe.cpp
+++ b/src/gui/remotewipe.cpp
@@ -58,7 +58,7 @@ void RemoteWipe::startCheckJobWithAppPassword(QString pwd){
     request.setUrl(requestUrl);
     request.setSslConfiguration(_account->getOrCreateSslConfig());
     auto requestBody = new QBuffer;
-    QUrlQuery arguments(QString("token=%1").arg(_appPassword));
+    QUrlQuery arguments(QStringLiteral("token=%1").arg(_appPassword));
     requestBody->setData(arguments.query(QUrl::FullyEncoded).toLatin1());
     _networkReplyCheck = _networkManager.post(request, requestBody);
     QObject::connect(&_networkManager, &QNetworkAccessManager::sslErrors,
@@ -79,16 +79,16 @@ void RemoteWipe::checkJobSlot()
             jsonParseError.error != QJsonParseError::NoError) {
         QString errorFromJson = json["error"].toString();
         if (!errorFromJson.isEmpty()) {
-            qCWarning(lcRemoteWipe) << QString("Error returned from the server: <em>%1<em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("Error returned from the server: <em>%1<em>")
                                        .arg(errorFromJson.toHtmlEscaped());
         } else if (_networkReplyCheck->error() != QNetworkReply::NoError) {
-            qCWarning(lcRemoteWipe) << QString("There was an error accessing the 'token' endpoint: <br><em>%1</em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("There was an error accessing the 'token' endpoint: <br><em>%1</em>")
                               .arg(_networkReplyCheck->errorString().toHtmlEscaped());
         } else if (jsonParseError.error != QJsonParseError::NoError) {
-            qCWarning(lcRemoteWipe) << QString("Could not parse the JSON returned from the server: <br><em>%1</em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("Could not parse the JSON returned from the server: <br><em>%1</em>")
                               .arg(jsonParseError.errorString());
         } else {
-            qCWarning(lcRemoteWipe) <<  QString("The reply from the server did not contain all expected fields");
+            qCWarning(lcRemoteWipe) <<  QStringLiteral("The reply from the server did not contain all expected fields");
         }
 
     // check for wipe request
@@ -136,7 +136,7 @@ void RemoteWipe::notifyServerSuccessJob(AccountState *accountState, bool dataWip
         request.setUrl(requestUrl);
         request.setSslConfiguration(_account->getOrCreateSslConfig());
         auto requestBody = new QBuffer;
-        QUrlQuery arguments(QString("token=%1").arg(_appPassword));
+        QUrlQuery arguments(QStringLiteral("token=%1").arg(_appPassword));
         requestBody->setData(arguments.query(QUrl::FullyEncoded).toLatin1());
         _networkReplySuccess = _networkManager.post(request, requestBody);
         QObject::connect(_networkReplySuccess, &QNetworkReply::finished, this,
@@ -153,16 +153,16 @@ void RemoteWipe::notifyServerSuccessJobSlot()
             jsonParseError.error != QJsonParseError::NoError) {
         QString errorFromJson = json["error"].toString();
         if (!errorFromJson.isEmpty()) {
-            qCWarning(lcRemoteWipe) << QString("Error returned from the server: <em>%1</em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("Error returned from the server: <em>%1</em>")
                               .arg(errorFromJson.toHtmlEscaped());
         } else if (_networkReplySuccess->error() != QNetworkReply::NoError) {
-            qCWarning(lcRemoteWipe) << QString("There was an error accessing the 'success' endpoint: <br><em>%1</em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("There was an error accessing the 'success' endpoint: <br><em>%1</em>")
                               .arg(_networkReplySuccess->errorString().toHtmlEscaped());
         } else if (jsonParseError.error != QJsonParseError::NoError) {
-            qCWarning(lcRemoteWipe) << QString("Could not parse the JSON returned from the server: <br><em>%1</em>")
+            qCWarning(lcRemoteWipe) << QStringLiteral("Could not parse the JSON returned from the server: <br><em>%1</em>")
                               .arg(jsonParseError.errorString());
         } else {
-            qCWarning(lcRemoteWipe) << QString("The reply from the server did not contain all expected fields.");
+            qCWarning(lcRemoteWipe) << QStringLiteral("The reply from the server did not contain all expected fields.");
         }
     }
 
diff --git a/src/gui/socketapi/socketapi.cpp b/src/gui/socketapi/socketapi.cpp
index bd68063fa2978..c000ae8fbf9d7 100644
--- a/src/gui/socketapi/socketapi.cpp
+++ b/src/gui/socketapi/socketapi.cpp
@@ -1167,13 +1167,13 @@ void SocketApi::command_GET_STRINGS(const QString &argument, SocketListener *lis
         { "EMAIL_PRIVATE_LINK_MENU_TITLE", tr("Send private link by email …") },
         { "CONTEXT_MENU_ICON", APPLICATION_ICON_NAME },
     } };
-    listener->sendMessage(QString("GET_STRINGS:BEGIN"));
+    listener->sendMessage(QStringLiteral("GET_STRINGS:BEGIN"));
     for (const auto& key_value : strings) {
         if (argument.isEmpty() || argument == QLatin1String(key_value.first)) {
-            listener->sendMessage(QString("STRING:%1:%2").arg(key_value.first, key_value.second));
+            listener->sendMessage(QStringLiteral("STRING:%1:%2").arg(key_value.first, key_value.second));
         }
     }
-    listener->sendMessage(QString("GET_STRINGS:END"));
+    listener->sendMessage(QStringLiteral("GET_STRINGS:END"));
 }
 
 void SocketApi::sendSharingContextMenuOptions(const FileData &fileData, SocketListener *listener, SharingContextItemEncryptedFlag itemEncryptionFlag, SharingContextItemRootEncryptedFolderFlag rootE2eeFolderFlag)
@@ -1364,7 +1364,7 @@ SocketApi::FileData SocketApi::FileData::parentFolder() const
 
 void SocketApi::command_GET_MENU_ITEMS(const QString &argument, OCC::SocketListener *listener)
 {
-    listener->sendMessage(QString("GET_MENU_ITEMS:BEGIN"), true);
+    listener->sendMessage(QStringLiteral("GET_MENU_ITEMS:BEGIN"), true);
     const QStringList files = split(argument);
 
     // Find the common sync folder.
@@ -1522,7 +1522,7 @@ void SocketApi::command_GET_MENU_ITEMS(const QString &argument, OCC::SocketListe
         }
     }
 
-    listener->sendMessage(QString("GET_MENU_ITEMS:END"));
+    listener->sendMessage(QStringLiteral("GET_MENU_ITEMS:END"));
 }
 
 DirectEditor* SocketApi::getDirectEditorForLocalFile(const QString &localFile)
diff --git a/src/gui/syncrunfilelog.cpp b/src/gui/syncrunfilelog.cpp
index 5610fb6a02ff7..4150d1f92615b 100644
--- a/src/gui/syncrunfilelog.cpp
+++ b/src/gui/syncrunfilelog.cpp
@@ -52,7 +52,7 @@ void SyncRunFileLog::start(const QString &folderPath)
         if(QString::compare(folderPath,line,Qt::CaseSensitive)!=0) {
             depthIndex++;
             if(depthIndex <= length) {
-                filenameSingle = folderPath.split(QLatin1String("/")).at(length - depthIndex) + QString("_") ///
+                filenameSingle = folderPath.split(QLatin1String("/")).at(length - depthIndex) + QStringLiteral("_") ///
                         + filenameSingle;
                 filename = logpath+ QLatin1String("/") + filenameSingle + QLatin1String("_sync.log");
             }
diff --git a/src/gui/tray/activitylistmodel.cpp b/src/gui/tray/activitylistmodel.cpp
index f2fc26ba1e18a..4016ef2567d2a 100644
--- a/src/gui/tray/activitylistmodel.cpp
+++ b/src/gui/tray/activitylistmodel.cpp
@@ -342,7 +342,7 @@ QVariant ActivityListModel::data(const QModelIndex &index, int role) const
     case AccountRole:
         return a._accName;
     case PointInTimeRole:
-        //return a._id == -1 ? "" : QString("%1 - %2").arg(Utility::timeAgoInWords(a._dateTime.toLocalTime()), a._dateTime.toLocalTime().toString(Qt::DefaultLocaleShortDate));
+        //return a._id == -1 ? "" : QStringLiteral("%1 - %2").arg(Utility::timeAgoInWords(a._dateTime.toLocalTime()), a._dateTime.toLocalTime().toString(Qt::DefaultLocaleShortDate));
         return a._id == -1 ? "" : Utility::timeAgoInWords(a._dateTime.toLocalTime());
     case AccountConnectedRole:
         return (ast && ast->isConnected());
diff --git a/src/gui/tray/unifiedsearchresultslistmodel.cpp b/src/gui/tray/unifiedsearchresultslistmodel.cpp
index 6ec9a7a2a6382..f28c8ce464846 100644
--- a/src/gui/tray/unifiedsearchresultslistmodel.cpp
+++ b/src/gui/tray/unifiedsearchresultslistmodel.cpp
@@ -383,7 +383,7 @@ void UnifiedSearchResultsListModel::slotSearchTermEditingFinished()
         &UnifiedSearchResultsListModel::slotSearchTermEditingFinished);
 
     if (!_accountState || !_accountState->account()) {
-        qCCritical(lcUnifiedSearch) << QString("Account state is invalid. Could not start search!");
+        qCCritical(lcUnifiedSearch) << QStringLiteral("Account state is invalid. Could not start search!");
         return;
     }
 
@@ -401,14 +401,14 @@ void UnifiedSearchResultsListModel::slotFetchProvidersFinished(const QJsonDocume
     const auto job = qobject_cast<JsonApiJob *>(sender());
 
     if (!job) {
-        qCCritical(lcUnifiedSearch) << QString("Failed to fetch providers.").arg(_searchTerm);
+        qCCritical(lcUnifiedSearch) << QStringLiteral("Failed to fetch providers.").arg(_searchTerm);
         _errorString += tr("Failed to fetch providers.") + QLatin1Char('\n');
         emit errorStringChanged();
         return;
     }
     
     if (statusCode != 200) {
-        qCCritical(lcUnifiedSearch) << QString("%1: Failed to fetch search providers for '%2'. Error: %3")
+        qCCritical(lcUnifiedSearch) << QStringLiteral("%1: Failed to fetch search providers for '%2'. Error: %3")
                                            .arg(statusCode)
                                            .arg(_searchTerm)
                                            .arg(job->errorString());
@@ -446,7 +446,7 @@ void UnifiedSearchResultsListModel::slotSearchForProviderFinished(const QJsonDoc
     const auto job = qobject_cast<JsonApiJob *>(sender());
 
     if (!job) {
-        qCCritical(lcUnifiedSearch) << QString("Search has failed for '%2'.").arg(_searchTerm);
+        qCCritical(lcUnifiedSearch) << QStringLiteral("Search has failed for '%2'.").arg(_searchTerm);
         _errorString += tr("Search has failed for '%2'.").arg(_searchTerm) + QLatin1Char('\n');
         emit errorStringChanged();
         return;
@@ -471,7 +471,7 @@ void UnifiedSearchResultsListModel::slotSearchForProviderFinished(const QJsonDoc
     }
 
     if (statusCode != 200) {
-        qCCritical(lcUnifiedSearch) << QString("%1: Search has failed for '%2'. Error: %3")
+        qCCritical(lcUnifiedSearch) << QStringLiteral("%1: Search has failed for '%2'. Error: %3")
                                            .arg(statusCode)
                                            .arg(_searchTerm)
                                            .arg(job->errorString());
diff --git a/src/gui/updater/ocupdater.cpp b/src/gui/updater/ocupdater.cpp
index e44cae12f6fda..b5f6ad49ddf84 100644
--- a/src/gui/updater/ocupdater.cpp
+++ b/src/gui/updater/ocupdater.cpp
@@ -221,7 +221,7 @@ void OCUpdater::slotStartInstaller()
         };
 
         QString msiLogFile = cfg.configPath() + "msi.log";
-        QString command = QString("&{msiexec /i '%1' /L*V '%2'| Out-Null ; &'%3'}")
+        QString command = QStringLiteral("&{msiexec /i '%1' /L*V '%2'| Out-Null ; &'%3'}")
              .arg(preparePathForPowershell(updateFile))
              .arg(preparePathForPowershell(msiLogFile))
              .arg(preparePathForPowershell(QCoreApplication::applicationFilePath()));
diff --git a/src/gui/updater/updateinfo.cpp b/src/gui/updater/updateinfo.cpp
index 55512374a1f57..76a7ac36c2d47 100644
--- a/src/gui/updater/updateinfo.cpp
+++ b/src/gui/updater/updateinfo.cpp
@@ -90,7 +90,7 @@ UpdateInfo UpdateInfo::parseString(const QString &xml, bool *ok)
     if (!doc.setContent(xml, false, &errorMsg, &errorLine, &errorCol)) {
         qCWarning(lcUpdater).noquote().nospace() << errorMsg << " at " << errorLine << "," << errorCol
                                 << "\n" <<  xml.split("\n").value(errorLine-1) << "\n"
-                                << QString(" ").repeated(errorCol - 1) << "^\n"
+                                << QStringLiteral(" ").repeated(errorCol - 1) << "^\n"
                                 << "->" << xml << "<-";
         if (ok)
             *ok = false;
diff --git a/src/gui/wizard/flow2authwidget.cpp b/src/gui/wizard/flow2authwidget.cpp
index 87f63d59197a8..9dabe299bd8e6 100644
--- a/src/gui/wizard/flow2authwidget.cpp
+++ b/src/gui/wizard/flow2authwidget.cpp
@@ -157,7 +157,7 @@ void Flow2AuthWidget::slotStatusChanged(Flow2Auth::PollStatus status, int second
             _statusUpdateSkipCount--;
             break;
         }
-        _ui.statusLabel->setText(tr("Waiting for authorization") + QString("… (%1)").arg(secondsLeft));
+        _ui.statusLabel->setText(tr("Waiting for authorization") + QStringLiteral("… (%1)").arg(secondsLeft));
         stopSpinner(true);
         break;
     case Flow2Auth::statusPollNow:
diff --git a/src/gui/wizard/owncloudsetuppage.cpp b/src/gui/wizard/owncloudsetuppage.cpp
index 708949f759a6d..b50c5c2012cf5 100644
--- a/src/gui/wizard/owncloudsetuppage.cpp
+++ b/src/gui/wizard/owncloudsetuppage.cpp
@@ -63,7 +63,7 @@ OwncloudSetupPage::OwncloudSetupPage(QWidget *parent)
             const auto serverObject = serverJson.toObject();
             const auto serverName = serverObject.value("name").toString();
             const auto serverUrl = serverObject.value("url").toString();
-            const auto serverDisplayString = QString("%1 (%2)").arg(serverName, serverUrl);
+            const auto serverDisplayString = QStringLiteral("%1 (%2)").arg(serverName, serverUrl);
             _ui.comboBox->addItem(serverDisplayString, serverUrl);
         }
     } else if (theme->forceOverrideServerUrl()) {
diff --git a/src/gui/wizard/welcomepage.cpp b/src/gui/wizard/welcomepage.cpp
index 1228f51599d87..fa706fbcd4052 100644
--- a/src/gui/wizard/welcomepage.cpp
+++ b/src/gui/wizard/welcomepage.cpp
@@ -71,8 +71,8 @@ void WelcomePage::styleSlideShow()
     _ui->slideShow->addSlide(wizardTalkIconFileName, tr("Screensharing, online meetings & web conferences"));
 
     const auto isDarkBackground = Theme::isDarkColor(backgroundColor);
-    _ui->slideShowNextButton->setIcon(theme->uiThemeIcon(QString("control-next.svg"), isDarkBackground));
-    _ui->slideShowPreviousButton->setIcon(theme->uiThemeIcon(QString("control-prev.svg"), isDarkBackground));
+    _ui->slideShowNextButton->setIcon(theme->uiThemeIcon(QStringLiteral("control-next.svg"), isDarkBackground));
+    _ui->slideShowPreviousButton->setIcon(theme->uiThemeIcon(QStringLiteral("control-prev.svg"), isDarkBackground));
 }
 
 void WelcomePage::setupSlideShow()
diff --git a/src/libsync/abstractnetworkjob.cpp b/src/libsync/abstractnetworkjob.cpp
index f08b135823f79..3ff6dd2c37b30 100644
--- a/src/libsync/abstractnetworkjob.cpp
+++ b/src/libsync/abstractnetworkjob.cpp
@@ -359,7 +359,7 @@ void AbstractNetworkJob::start()
     _timer.start();
 
     const QUrl url = account()->url();
-    const QString displayUrl = QString("%1://%2%3").arg(url.scheme()).arg(url.host()).arg(url.path());
+    const QString displayUrl = QStringLiteral("%1://%2%3").arg(url.scheme()).arg(url.host()).arg(url.path());
 
     QString parentMetaObjectName = parent() ? parent()->metaObject()->className() : "";
     qCInfo(lcNetworkJob) << metaObject()->className() << "created for" << displayUrl << "+" << path() << parentMetaObjectName;
diff --git a/src/libsync/account.cpp b/src/libsync/account.cpp
index 401e22ae9a038..02edfc60aad8c 100644
--- a/src/libsync/account.cpp
+++ b/src/libsync/account.cpp
@@ -156,7 +156,7 @@ void Account::setAvatar(const QImage &img)
 
 QString Account::displayName() const
 {
-    QString dn = QString("%1@%2").arg(credentials()->user(), _url.host());
+    QString dn = QStringLiteral("%1@%2").arg(credentials()->user(), _url.host());
     int port = url().port();
     if (port > 0 && port != 80 && port != 443) {
         dn.append(QLatin1Char(':'));
diff --git a/src/libsync/clientproxy.cpp b/src/libsync/clientproxy.cpp
index 2deba9d546943..48c277de626d1 100644
--- a/src/libsync/clientproxy.cpp
+++ b/src/libsync/clientproxy.cpp
@@ -78,7 +78,7 @@ const char *ClientProxy::proxyTypeToCStr(QNetworkProxy::ProxyType type)
 
 QString ClientProxy::printQNetworkProxy(const QNetworkProxy &proxy)
 {
-    return QString("%1://%2:%3").arg(proxyTypeToCStr(proxy.type())).arg(proxy.hostName()).arg(proxy.port());
+    return QStringLiteral("%1://%2:%3").arg(proxyTypeToCStr(proxy.type())).arg(proxy.hostName()).arg(proxy.port());
 }
 
 void ClientProxy::setupQtProxyFromConfig()
diff --git a/src/libsync/configfile.cpp b/src/libsync/configfile.cpp
index 7e62925c79d29..6f2c152ed134f 100644
--- a/src/libsync/configfile.cpp
+++ b/src/libsync/configfile.cpp
@@ -449,7 +449,7 @@ QString ConfigFile::backup(const QString &fileName) const
     }
 
     QString backupFile =
-        QString("%1.backup_%2%3")
+        QStringLiteral("%1.backup_%2%3")
             .arg(baseFilePath)
             .arg(QDateTime::currentDateTime().toString("yyyyMMdd_HHmmss"))
             .arg(versionString);
diff --git a/src/libsync/creds/keychainchunk.cpp b/src/libsync/creds/keychainchunk.cpp
index dc2fff401dba6..115c4321dbdc8 100644
--- a/src/libsync/creds/keychainchunk.cpp
+++ b/src/libsync/creds/keychainchunk.cpp
@@ -205,7 +205,7 @@ void WriteJob::slotWriteJobDone(QKeychain::Job *incomingJob)
             return;
         }
 
-        const QString keyWithIndex = _key + (index > 0 ? (QString(".") + QString::number(index)) : QString());
+        const QString keyWithIndex = _key + (index > 0 ? (QStringLiteral(".") + QString::number(index)) : QString());
         const QString kck = _account ? AbstractCredentials::keychainKey(
                 _account->url().toString(),
                 keyWithIndex,
@@ -313,7 +313,7 @@ void ReadJob::slotReadJobDone(QKeychain::Job *incomingJob)
 #if defined(Q_OS_WIN)
         // try to fetch next chunk
         if (_chunkCount < KeychainChunk::MaxChunks) {
-            const QString keyWithIndex = _key + QString(".") + QString::number(_chunkCount);
+            const QString keyWithIndex = _key + QStringLiteral(".") + QString::number(_chunkCount);
             const QString kck = _account ? AbstractCredentials::keychainKey(
                     _account->url().toString(),
                     keyWithIndex,
@@ -442,7 +442,7 @@ void DeleteJob::slotDeleteJobDone(QKeychain::Job *incomingJob)
 #if defined(Q_OS_WIN)
         // try to delete next chunk
         if (_chunkCount < KeychainChunk::MaxChunks) {
-            const QString keyWithIndex = _key + QString(".") + QString::number(_chunkCount);
+            const QString keyWithIndex = _key + QStringLiteral(".") + QString::number(_chunkCount);
             const QString kck = _account ? AbstractCredentials::keychainKey(
                     _account->url().toString(),
                     keyWithIndex,
diff --git a/src/libsync/discovery.cpp b/src/libsync/discovery.cpp
index ee7f7ae3a847a..3982f6cbef1ff 100644
--- a/src/libsync/discovery.cpp
+++ b/src/libsync/discovery.cpp
@@ -450,7 +450,7 @@ bool ProcessDirectoryJob::handleExcluded(const QString &path, const Entries &ent
             if (containsForbiddenCharacters) {
                 reasonString = tr("Reason: the filename contains a forbidden character (%1).").arg(forbiddenCharMatch);
             }
-            item->_errorString = reasonString.isEmpty() ? errorString : QString("%1 %2").arg(errorString, reasonString);
+            item->_errorString = reasonString.isEmpty() ? errorString : QStringLiteral("%1 %2").arg(errorString, reasonString);
             item->_status = SyncFileItem::FileNameInvalidOnServer;
             break;
         }
diff --git a/src/libsync/networkjobs.cpp b/src/libsync/networkjobs.cpp
index 78356f8c92f3d..0ed448a5c46a7 100644
--- a/src/libsync/networkjobs.cpp
+++ b/src/libsync/networkjobs.cpp
@@ -796,9 +796,9 @@ AvatarJob::AvatarJob(AccountPtr account, const QString &userId, int size, QObjec
     : AbstractNetworkJob(account, QString(), parent)
 {
     if (account->serverVersionInt() >= Account::makeServerVersion(10, 0, 0)) {
-        _avatarUrl = Utility::concatUrlPath(account->url(), QString("remote.php/dav/avatars/%1/%2.png").arg(userId, QString::number(size)));
+        _avatarUrl = Utility::concatUrlPath(account->url(), QStringLiteral("remote.php/dav/avatars/%1/%2.png").arg(userId, QString::number(size)));
     } else {
-        _avatarUrl = Utility::concatUrlPath(account->url(), QString("index.php/avatar/%1/%2").arg(userId, QString::number(size)));
+        _avatarUrl = Utility::concatUrlPath(account->url(), QStringLiteral("index.php/avatar/%1/%2").arg(userId, QString::number(size)));
     }
 }
 
diff --git a/src/libsync/nextcloudtheme.cpp b/src/libsync/nextcloudtheme.cpp
index 2a709564c6e4a..cae0e68da6eeb 100644
--- a/src/libsync/nextcloudtheme.cpp
+++ b/src/libsync/nextcloudtheme.cpp
@@ -35,7 +35,7 @@ NextcloudTheme::NextcloudTheme()
 
 QString NextcloudTheme::wizardUrlHint() const
 {
-    return QString("https://try.nextcloud.com");
+    return QStringLiteral("https://try.nextcloud.com");
 }
 
 }
diff --git a/src/libsync/propagatedownload.cpp b/src/libsync/propagatedownload.cpp
index 9fcc3988fb78e..067e6d0a58e46 100644
--- a/src/libsync/propagatedownload.cpp
+++ b/src/libsync/propagatedownload.cpp
@@ -1093,7 +1093,7 @@ namespace { // Anonymous namespace for the recall feature
         int chownErr = chown(fileName.toLocal8Bit().constData(), -1, fi.groupId());
         if (chownErr) {
             // TODO: Consider further error handling!
-            qCWarning(lcPropagateDownload) << QString("preserveGroupOwnership: chown error %1: setting group %2 failed on file %3").arg(chownErr).arg(fi.groupId()).arg(fileName);
+            qCWarning(lcPropagateDownload) << QStringLiteral("preserveGroupOwnership: chown error %1: setting group %2 failed on file %3").arg(chownErr).arg(fi.groupId()).arg(fileName);
         }
 #else
         Q_UNUSED(fileName);
@@ -1290,7 +1290,7 @@ void PropagateDownloadFile::downloadFinished()
     emit propagator()->touchedFile(filename);
     // The fileChanged() check is done above to generate better error messages.
     if (!FileSystem::uncheckedRenameReplace(_tmpFile.fileName(), filename, &error)) {
-        qCWarning(lcPropagateDownload) << QString("Rename failed: %1 => %2").arg(_tmpFile.fileName()).arg(filename);
+        qCWarning(lcPropagateDownload) << QStringLiteral("Rename failed: %1 => %2").arg(_tmpFile.fileName()).arg(filename);
         // If the file is locked, we want to retry this sync when it
         // becomes available again, otherwise try again directly
         if (FileSystem::isFileLocked(filename)) {
diff --git a/src/libsync/propagateuploadng.cpp b/src/libsync/propagateuploadng.cpp
index 32e1192f3fa2f..d7f189417a447 100644
--- a/src/libsync/propagateuploadng.cpp
+++ b/src/libsync/propagateuploadng.cpp
@@ -50,7 +50,7 @@ QUrl PropagateUploadFileNG::chunkUrl(const int chunk) const
     constexpr auto maxChunkDigits = 5; // Chunk V2: max num of chunks is 10000
 
     // We need to do add leading 0 because the server orders the chunk alphabetically
-    const auto chunkNumString = QString("%1").arg(chunk, maxChunkDigits, 10, QChar('0'));
+    const auto chunkNumString = QStringLiteral("%1").arg(chunk, maxChunkDigits, 10, QChar('0'));
     return Utility::concatUrlPath(chunkUploadFolderUrl(), chunkNumString);
 }
 
diff --git a/src/libsync/propagateuploadv1.cpp b/src/libsync/propagateuploadv1.cpp
index 6bab06305b756..31b2703eeed6d 100644
--- a/src/libsync/propagateuploadv1.cpp
+++ b/src/libsync/propagateuploadv1.cpp
@@ -115,7 +115,7 @@ void PropagateUploadFileV1::startNextChunk()
         // XOR with chunk size to make sure everything goes well if chunk size changes between runs
         uint transid = _transferId ^ uint(chunkSize());
         qCInfo(lcPropagateUploadV1) << "Upload chunk" << sendingChunk << "of" << _chunkCount << "transferid(remote)=" << transid;
-        path += QString("-chunking-%1-%2-%3").arg(transid).arg(_chunkCount).arg(sendingChunk);
+        path += QStringLiteral("-chunking-%1-%2-%3").arg(transid).arg(_chunkCount).arg(sendingChunk);
 
         headers[QByteArrayLiteral("OC-Chunked")] = QByteArrayLiteral("1");
 
diff --git a/src/libsync/vfs/cfapi/cfapiwrapper.cpp b/src/libsync/vfs/cfapi/cfapiwrapper.cpp
index a483d2c066383..aa9e87c1b8c01 100644
--- a/src/libsync/vfs/cfapi/cfapiwrapper.cpp
+++ b/src/libsync/vfs/cfapi/cfapiwrapper.cpp
@@ -567,7 +567,7 @@ bool createSyncRootRegistryKeys(const QString &providerName, const QString &fold
 
     // syncRootId should be: [storage provider ID]![Windows SID]![Account ID]![FolderAlias] (FolderAlias is a custom part added here to be able to register multiple sync folders for the same account)
     // folder registry keys go like: Nextcloud!S-1-5-21-2096452760-2617351404-2281157308-1001!user@nextcloud.lan:8080!0, Nextcloud!S-1-5-21-2096452760-2617351404-2281157308-1001!user@nextcloud.lan:8080!1, etc. for each sync folder
-    const auto syncRootId = QString("%1!%2!%3!%4").arg(providerName).arg(windowsSid).arg(accountDisplayName).arg(folderAlias);
+    const auto syncRootId = QStringLiteral("%1!%2!%3!%4").arg(providerName).arg(windowsSid).arg(accountDisplayName).arg(folderAlias);
 
     const QString providerSyncRootIdRegistryKey = syncRootManagerRegKey + QStringLiteral("\\") + syncRootId;
     const QString providerSyncRootIdUserSyncRootsRegistryKey = providerSyncRootIdRegistryKey + QStringLiteral(R"(\UserSyncRoots\)");
@@ -615,7 +615,7 @@ bool deleteSyncRootRegistryKey(const QString &syncRootPath, const QString &provi
             return false;
         }
 
-        const auto currentUserSyncRootIdPattern = QString("%1!%2!%3").arg(providerName).arg(windowsSid).arg(accountDisplayName);
+        const auto currentUserSyncRootIdPattern = QStringLiteral("%1!%2!%3").arg(providerName).arg(windowsSid).arg(accountDisplayName);
 
         bool result = true;
 
@@ -689,7 +689,7 @@ void unregisterSyncRootShellExtensions(const QString &providerName, const QStrin
         return;
     }
 
-    const auto syncRootId = QString("%1!%2!%3!%4").arg(providerName).arg(windowsSid).arg(accountDisplayName).arg(folderAlias);
+    const auto syncRootId = QStringLiteral("%1!%2!%3!%4").arg(providerName).arg(windowsSid).arg(accountDisplayName).arg(folderAlias);
 
     const QString providerSyncRootIdRegistryKey = syncRootManagerRegKey + QStringLiteral("\\") + syncRootId;
 
@@ -755,7 +755,7 @@ bool OCC::CfApiWrapper::isAnySyncRoot(const QString &providerName, const QString
         return false;
     }
 
-    const auto syncRootPrefix = QString("%1!%2!%3!").arg(providerName).arg(windowsSid).arg(accountDisplayName);
+    const auto syncRootPrefix = QStringLiteral("%1!%2!%3!").arg(providerName).arg(windowsSid).arg(accountDisplayName);
 
     if (Utility::registryKeyExists(HKEY_LOCAL_MACHINE, syncRootManagerRegKey)) {
         bool foundSyncRoots = false;
diff --git a/src/libsync/vfs/cfapi/shellext/customstateprovider.cpp b/src/libsync/vfs/cfapi/shellext/customstateprovider.cpp
index 8f7a2266fa4b8..baa92cfbb8266 100644
--- a/src/libsync/vfs/cfapi/shellext/customstateprovider.cpp
+++ b/src/libsync/vfs/cfapi/shellext/customstateprovider.cpp
@@ -84,8 +84,8 @@ CustomStateProvider::GetItemProperties(hstring const &itemPath)
 
             winrt::Windows::Storage::Provider::StorageProviderItemProperty itemProperty;
             itemProperty.Id(stateValue);
-            itemProperty.Value(QString("Value%1").arg(stateValue).toStdWString());
-            itemProperty.IconResource(QString(_dllFilePath + QString(",%1").arg(QString::number(stateValue))).toStdWString());
+            itemProperty.Value(QStringLiteral("Value%1").arg(stateValue).toStdWString());
+            itemProperty.IconResource(QString(_dllFilePath + QStringLiteral(",%1").arg(QString::number(stateValue))).toStdWString());
             properties.push_back(std::move(itemProperty));
         }
     }
diff --git a/src/libsync/vfs/suffix/vfs_suffix.cpp b/src/libsync/vfs/suffix/vfs_suffix.cpp
index 59c868b31fb69..b1c9dcea997f6 100644
--- a/src/libsync/vfs/suffix/vfs_suffix.cpp
+++ b/src/libsync/vfs/suffix/vfs_suffix.cpp
@@ -95,13 +95,13 @@ Result<void, QString> VfsSuffix::createPlaceholder(const SyncFileItem &item)
     QString fn = _setupParams.filesystemPath + item._file;
     if (!fn.endsWith(fileSuffix())) {
         ASSERT(false, "vfs file isn't ending with suffix");
-        return QString("vfs file isn't ending with suffix");
+        return QStringLiteral("vfs file isn't ending with suffix");
     }
 
     QFile file(fn);
     if (file.exists() && file.size() > 1
         && !FileSystem::verifyFileUnchanged(fn, item._size, item._modtime)) {
-        return QString("Cannot create a placeholder because a file with the placeholder name already exist");
+        return QStringLiteral("Cannot create a placeholder because a file with the placeholder name already exist");
     }
 
     if (!file.open(QFile::ReadWrite | QFile::Truncate))
diff --git a/test/syncenginetestutils.h b/test/syncenginetestutils.h
index 49cdac710338b..866d49124ccc3 100644
--- a/test/syncenginetestutils.h
+++ b/test/syncenginetestutils.h
@@ -614,18 +614,18 @@ struct ItemCompletedSpy : QSignalSpy {
 // QTest::toString overloads
 namespace OCC {
     inline char *toString(const SyncFileStatus &s) {
-        return QTest::toString(QString("SyncFileStatus(" + s.toSocketAPIString() + ")"));
+        return QTest::toString(QStringLiteral("SyncFileStatus(" + s.toSocketAPIString() + ")"));
     }
 }
 
 inline void addFiles(QStringList &dest, const FileInfo &fi)
 {
     if (fi.isDir) {
-        dest += QString("%1 - dir").arg(fi.path());
+        dest += QStringLiteral("%1 - dir").arg(fi.path());
         foreach (const FileInfo &fi, fi.children)
             addFiles(dest, fi);
     } else {
-        dest += QString("%1 - %2 %3-bytes").arg(fi.path()).arg(fi.size).arg(fi.contentChar);
+        dest += QStringLiteral("%1 - %2 %3-bytes").arg(fi.path()).arg(fi.size).arg(fi.contentChar);
     }
 }
 
@@ -635,7 +635,7 @@ inline QString toStringNoElide(const FileInfo &fi)
     foreach (const FileInfo &fi, fi.children)
         addFiles(files, fi);
     files.sort();
-    return QString("FileInfo with %1 files(\n\t%2\n)").arg(files.size()).arg(files.join("\n\t"));
+    return QStringLiteral("FileInfo with %1 files(\n\t%2\n)").arg(files.size()).arg(files.join("\n\t"));
 }
 
 inline char *toString(const FileInfo &fi)
@@ -647,7 +647,7 @@ inline void addFilesDbData(QStringList &dest, const FileInfo &fi)
 {
     // could include etag, permissions etc, but would need extra work
     if (fi.isDir) {
-        dest += QString("%1 - %2 %3 %4").arg(
+        dest += QStringLiteral("%1 - %2 %3 %4").arg(
             fi.name,
             fi.isDir ? "dir" : "file",
             QString::number(fi.lastModified.toSecsSinceEpoch()),
@@ -655,7 +655,7 @@ inline void addFilesDbData(QStringList &dest, const FileInfo &fi)
         foreach (const FileInfo &fi, fi.children)
             addFilesDbData(dest, fi);
     } else {
-        dest += QString("%1 - %2 %3 %4 %5").arg(
+        dest += QStringLiteral("%1 - %2 %3 %4 %5").arg(
             fi.name,
             fi.isDir ? "dir" : "file",
             QString::number(fi.size),
@@ -669,5 +669,5 @@ inline char *printDbData(const FileInfo &fi)
     QStringList files;
     foreach (const FileInfo &fi, fi.children)
         addFilesDbData(files, fi);
-    return QTest::toString(QString("FileInfo with %1 files(%2)").arg(files.size()).arg(files.join(", ")));
+    return QTest::toString(QStringLiteral("FileInfo with %1 files(%2)").arg(files.size()).arg(files.join(", ")));
 }
diff --git a/test/testcfapishellextensionsipc.cpp b/test/testcfapishellextensionsipc.cpp
index 12af7724c1cbd..3b823097adbdf 100644
--- a/test/testcfapishellextensionsipc.cpp
+++ b/test/testcfapishellextensionsipc.cpp
@@ -241,7 +241,7 @@ private slots:
         std::thread t1([&] {
             VfsShellExtensions::ThumbnailProviderIpc thumbnailProviderIpc;
             thumbnailReplyData = thumbnailProviderIpc.fetchThumbnailForFile(
-                fakeFolder.localPath() + QString("A/photos/wrong.jpg"), QSize(256, 256));
+                fakeFolder.localPath() + QStringLiteral("A/photos/wrong.jpg"), QSize(256, 256));
             QMetaObject::invokeMethod(&loop, &QEventLoop::quit, Qt::QueuedConnection);
         });
         loop.exec();
diff --git a/test/testchunkingng.cpp b/test/testchunkingng.cpp
index 87612fab538a1..20126ee452867 100644
--- a/test/testchunkingng.cpp
+++ b/test/testchunkingng.cpp
@@ -100,7 +100,7 @@ private slots:
         const auto chunkingId = fakeFolder.uploadState().children.first().name;
         const auto chunkMap = fakeFolder.uploadState().children.first().children;
         const auto firstChunkName = chunkMap.first().name;
-        const auto expectedChunkName = QString("%1").arg(1, 5, 10, QChar('0'));
+        const auto expectedChunkName = QStringLiteral("%1").arg(1, 5, 10, QChar('0'));
         QCOMPARE(firstChunkName, expectedChunkName);
     }
 
@@ -232,7 +232,7 @@ private slots:
 
         // Add a chunk that makes the file completely uploaded
         const auto testChunkNameNum = chunkMap.count() + 1; // Chunk nums start at 1 with Chunk V2, so size() == last num, add 1
-        const auto testChunkName = QString("%1").arg(testChunkNameNum, 5, 10, QChar('0'));
+        const auto testChunkName = QStringLiteral("%1").arg(testChunkNameNum, 5, 10, QChar('0'));
         const auto testChunkSize = size - uploadedSize;
         fakeFolder.uploadState().children.first().insert(testChunkName, testChunkSize);
 
@@ -285,7 +285,7 @@ private slots:
 
         // Add a chunk that makes the file more than completely uploaded
         const auto testChunkNameNum = chunkMap.count() + 1; // Chunk nums start at 1 with Chunk V2, so size() == last num, add 1
-        const auto testChunkName = QString("%1").arg(testChunkNameNum, 5, 10, QChar('0'));
+        const auto testChunkName = QStringLiteral("%1").arg(testChunkNameNum, 5, 10, QChar('0'));
         const auto testChunkSize = size - uploadedSize + 100;
         fakeFolder.uploadState().children.first().insert(testChunkName, testChunkSize);
 
diff --git a/test/testdownload.cpp b/test/testdownload.cpp
index 62108f457b51a..97df1c0983965 100644
--- a/test/testdownload.cpp
+++ b/test/testdownload.cpp
@@ -82,7 +82,7 @@ private slots:
 
         QVERIFY(!fakeFolder.syncOnce()); // The sync must fail because not all the file was downloaded
         QCOMPARE(getItem(completeSpy, "A/a0")->_status, SyncFileItem::SoftError);
-        QCOMPARE(getItem(completeSpy, "A/a0")->_errorString, QString("The file could not be downloaded completely."));
+        QCOMPARE(getItem(completeSpy, "A/a0")->_errorString, QStringLiteral("The file could not be downloaded completely."));
         QVERIFY(fakeFolder.syncEngine().isAnotherSyncNeeded());
 
         // Now, we need to restart, this time, it should resume.
diff --git a/test/testexcludedfiles.cpp b/test/testexcludedfiles.cpp
index ea525748447bf..2fd33c990dd8a 100644
--- a/test/testexcludedfiles.cpp
+++ b/test/testexcludedfiles.cpp
@@ -715,7 +715,7 @@ private slots:
     void testAddExcludeFilePath_addSameFilePath_listSizeDoesNotIncrease()
     {
         excludedFiles.reset(new ExcludedFiles());
-        const auto filePath = QString("exclude/.sync-exclude.lst");
+        const auto filePath = QStringLiteral("exclude/.sync-exclude.lst");
         
         excludedFiles->addExcludeFilePath(filePath);
         excludedFiles->addExcludeFilePath(filePath);        
@@ -727,8 +727,8 @@ private slots:
     {
         excludedFiles.reset(new ExcludedFiles());
         
-        const auto filePath1 = QString("exclude1/.sync-exclude.lst");
-        const auto filePath2 = QString("exclude2/.sync-exclude.lst");
+        const auto filePath1 = QStringLiteral("exclude1/.sync-exclude.lst");
+        const auto filePath2 = QStringLiteral("exclude2/.sync-exclude.lst");
     
         excludedFiles->addExcludeFilePath(filePath1);
         excludedFiles->addExcludeFilePath(filePath2);
diff --git a/test/testfolderwatcher.cpp b/test/testfolderwatcher.cpp
index 10d945b5de5d7..598c361a76c44 100644
--- a/test/testfolderwatcher.cpp
+++ b/test/testfolderwatcher.cpp
@@ -17,7 +17,7 @@ void touch(const QString &file)
     OCC::Utility::writeRandomFile(file);
 #else
     QString cmd;
-    cmd = QString("touch %1").arg(file);
+    cmd = QStringLiteral("touch %1").arg(file);
     qDebug() << "Command: " << cmd;
     system(cmd.toLocal8Bit());
 #endif
@@ -29,7 +29,7 @@ void mkdir(const QString &file)
     QDir dir;
     dir.mkdir(file);
 #else
-    QString cmd = QString("mkdir %1").arg(file);
+    QString cmd = QStringLiteral("mkdir %1").arg(file);
     qDebug() << "Command: " << cmd;
     system(cmd.toLocal8Bit());
 #endif
@@ -41,7 +41,7 @@ void rmdir(const QString &file)
     QDir dir;
     dir.rmdir(file);
 #else
-    QString cmd = QString("rmdir %1").arg(file);
+    QString cmd = QStringLiteral("rmdir %1").arg(file);
     qDebug() << "Command: " << cmd;
     system(cmd.toLocal8Bit());
 #endif
@@ -52,7 +52,7 @@ void rm(const QString &file)
 #ifdef Q_OS_WIN
     QFile::remove(file);
 #else
-    QString cmd = QString("rm %1").arg(file);
+    QString cmd = QStringLiteral("rm %1").arg(file);
     qDebug() << "Command: " << cmd;
     system(cmd.toLocal8Bit());
 #endif
@@ -63,7 +63,7 @@ void mv(const QString &file1, const QString &file2)
 #ifdef Q_OS_WIN
     QFile::rename(file1, file2);
 #else
-    QString cmd = QString("mv %1 %2").arg(file1, file2);
+    QString cmd = QStringLiteral("mv %1 %2").arg(file1, file2);
     qDebug() << "Command: " << cmd;
     system(cmd.toLocal8Bit());
 #endif
@@ -158,7 +158,7 @@ private slots:
     void testACreate() { // create a new file
         QString file(_rootPath + "/foo.txt");
         QString cmd;
-        cmd = QString("echo \"xyz\" > \"%1\"").arg(file);
+        cmd = QStringLiteral("echo \"xyz\" > \"%1\"").arg(file);
         qDebug() << "Command: " << cmd;
         system(cmd.toLocal8Bit());
 
diff --git a/test/testinotifywatcher.cpp b/test/testinotifywatcher.cpp
index 204939f9132c6..bb87c4b4aa839 100644
--- a/test/testinotifywatcher.cpp
+++ b/test/testinotifywatcher.cpp
@@ -62,7 +62,7 @@ private slots:
 
     void cleanupTestCase() {
         if( _root.startsWith(QDir::tempPath() )) {
-           system( QString("rm -rf %1").arg(_root).toLocal8Bit() );
+           system( QStringLiteral("rm -rf %1").arg(_root).toLocal8Bit() );
         }
     }
 };
diff --git a/test/testlockfile.cpp b/test/testlockfile.cpp
index ce91016f7ae09..720c768389eb5 100644
--- a/test/testlockfile.cpp
+++ b/test/testlockfile.cpp
@@ -768,8 +768,8 @@ private slots:
         fakeFolder.syncEngine().account()->setCapabilities({{"files", QVariantMap{{"locking", QByteArray{"1.0"}}}}});
         QSignalSpy lockFileDetectedNewlyUploadedSpy(&fakeFolder.syncEngine(), &OCC::SyncEngine::lockFileDetected);
 
-        fakeFolder.localModifier().insert(testDocumentsDirName + QString("/") + testLockFileName);
-        fakeFolder.localModifier().insert(testDocumentsDirName + QString("/") + testFileName);
+        fakeFolder.localModifier().insert(testDocumentsDirName + QStringLiteral("/") + testLockFileName);
+        fakeFolder.localModifier().insert(testDocumentsDirName + QStringLiteral("/") + testFileName);
 
         QVERIFY(fakeFolder.syncOnce());
 
diff --git a/test/testnetrcparser.cpp b/test/testnetrcparser.cpp
index f826edd8db536..3c32f00763bd3 100644
--- a/test/testnetrcparser.cpp
+++ b/test/testnetrcparser.cpp
@@ -55,10 +55,10 @@ private slots:
        NetrcParser parser(testfileC);
        QEXPECT_FAIL("", "test currently broken, eventually will be fixed", Abort);
        QVERIFY(parser.parse());
-       QCOMPARE(parser.find("foo"), qMakePair(QString("bar"), QString("baz")));
-       QCOMPARE(parser.find("broken"), qMakePair(QString("bar2"), QString()));
-       QCOMPARE(parser.find("funnysplit"), qMakePair(QString("bar3"), QString("baz3")));
-       QCOMPARE(parser.find("frob"), qMakePair(QString("user with spaces"), QString("space pwd")));
+       QCOMPARE(parser.find("foo"), qMakePair(QStringLiteral("bar"), QStringLiteral("baz")));
+       QCOMPARE(parser.find("broken"), qMakePair(QStringLiteral("bar2"), QString()));
+       QCOMPARE(parser.find("funnysplit"), qMakePair(QStringLiteral("bar3"), QStringLiteral("baz3")));
+       QCOMPARE(parser.find("frob"), qMakePair(QStringLiteral("user with spaces"), QStringLiteral("space pwd")));
     }
 
     void testEmptyNetrc() {
@@ -71,8 +71,8 @@ private slots:
        NetrcParser parser(testfileWithDefaultC);
        QEXPECT_FAIL("", "test currently broken, eventually will be fixed", Abort);
        QVERIFY(parser.parse());
-       QCOMPARE(parser.find("foo"), qMakePair(QString("bar"), QString("baz")));
-       QCOMPARE(parser.find("dontknow"), qMakePair(QString("user"), QString("pass")));
+       QCOMPARE(parser.find("foo"), qMakePair(QStringLiteral("bar"), QStringLiteral("baz")));
+       QCOMPARE(parser.find("dontknow"), qMakePair(QStringLiteral("user"), QStringLiteral("pass")));
     }
 
     void testInvalidNetrc() {
diff --git a/test/testselectivesync.cpp b/test/testselectivesync.cpp
index 2af525007009b..6ec7a5dd32928 100644
--- a/test/testselectivesync.cpp
+++ b/test/testselectivesync.cpp
@@ -65,7 +65,7 @@ private slots:
         QVERIFY(fakeFolder.syncOnce());
 
         QCOMPARE(newBigFolder.count(), 1);
-        QCOMPARE(newBigFolder.first()[0].toString(), QString("A/newBigDir"));
+        QCOMPARE(newBigFolder.first()[0].toString(), QStringLiteral("A/newBigDir"));
         QCOMPARE(newBigFolder.first()[1].toBool(), false);
         newBigFolder.clear();
 
@@ -75,7 +75,7 @@ private slots:
 
         auto oldSync = fakeFolder.currentLocalState();
         // syncing again should do the same
-        fakeFolder.syncEngine().journal()->schedulePathForRemoteDiscovery(QString("A/newBigDir"));
+        fakeFolder.syncEngine().journal()->schedulePathForRemoteDiscovery(QStringLiteral("A/newBigDir"));
         QVERIFY(fakeFolder.syncOnce());
         QCOMPARE(fakeFolder.currentLocalState(), oldSync);
         QCOMPARE(newBigFolder.count(), 1); // (since we don't have a real Folder, the files were not added to any list)
@@ -86,7 +86,7 @@ private slots:
         // Simulate that we accept all files by setting a wildcard white list
         fakeFolder.syncEngine().journal()->setSelectiveSyncList(SyncJournalDb::SelectiveSyncWhiteList,
             QStringList() << QLatin1String("/"));
-        fakeFolder.syncEngine().journal()->schedulePathForRemoteDiscovery(QString("A/newBigDir"));
+        fakeFolder.syncEngine().journal()->schedulePathForRemoteDiscovery(QStringLiteral("A/newBigDir"));
         QVERIFY(fakeFolder.syncOnce());
         QCOMPARE(newBigFolder.count(), 0);
         QCOMPARE(sizeRequests.count(), 0);
diff --git a/test/testsharemodel.cpp b/test/testsharemodel.cpp
index 5d8800985b905..041fd5f73ce65 100644
--- a/test/testsharemodel.cpp
+++ b/test/testsharemodel.cpp
@@ -371,7 +371,7 @@ private slots:
 
         // Check correct user avatar
         const auto avatarUrl = shareIndex.data(ShareModel::AvatarUrlRole).toString();
-        const auto relativeAvatarPath = QString("remote.php/dav/avatars/%1/%2.png").arg(_testUserShareDefinition.shareShareWith, QString::number(64));
+        const auto relativeAvatarPath = QStringLiteral("remote.php/dav/avatars/%1/%2.png").arg(_testUserShareDefinition.shareShareWith, QString::number(64));
         const auto expectedAvatarPath = Utility::concatUrlPath(helper.account->url(), relativeAvatarPath).toString();
         const QString expectedUrl(QStringLiteral("image://tray-image-provider/") + expectedAvatarPath);
         QCOMPARE(avatarUrl, expectedUrl);
diff --git a/test/testsyncconflict.cpp b/test/testsyncconflict.cpp
index ce358feeddb66..eb8b938b0a9b3 100644
--- a/test/testsyncconflict.cpp
+++ b/test/testsyncconflict.cpp
@@ -138,7 +138,7 @@ private slots:
         QCOMPARE(Utility::conflictFileBaseNameFromPattern(conflictMap[a1FileId].toUtf8()), QByteArray("A/a1"));
 
         // Check that the conflict file contains the username
-        QVERIFY(conflictMap[a1FileId].contains(QString("(conflicted copy %1 ").arg(fakeFolder.syncEngine().account()->davDisplayName())));
+        QVERIFY(conflictMap[a1FileId].contains(QStringLiteral("(conflicted copy %1 ").arg(fakeFolder.syncEngine().account()->davDisplayName())));
 
         QCOMPARE(remote.find(conflictMap[a1FileId])->contentChar, 'L');
         QCOMPARE(remote.find("A/a1")->contentChar, 'R');
diff --git a/test/testsyncengine.cpp b/test/testsyncengine.cpp
index c46a9f7ab0143..f554c64abba82 100644
--- a/test/testsyncengine.cpp
+++ b/test/testsyncengine.cpp
@@ -721,7 +721,7 @@ private slots:
         // Begin Test mismatch recalculation---------------------------------------------------------------------------------
 
         const auto prevServerVersion = fakeFolder.account()->serverVersion();
-        fakeFolder.account()->setServerVersion(QString("%1.0.0").arg(fakeFolder.account()->checksumRecalculateServerVersionMinSupportedMajor()));
+        fakeFolder.account()->setServerVersion(QStringLiteral("%1.0.0").arg(fakeFolder.account()->checksumRecalculateServerVersionMinSupportedMajor()));
 
         // Mismatched OC-Checksum and X-Recalculate-Hash is not supported -> sync must fail
         isChecksumRecalculateSupported = false;
diff --git a/test/testutility.cpp b/test/testutility.cpp
index efd6e684cc11b..b1013d3cc3d04 100644
--- a/test/testutility.cpp
+++ b/test/testutility.cpp
@@ -39,29 +39,29 @@ private slots:
     void testOctetsToString()
     {
         QLocale::setDefault(QLocale("en"));
-        QCOMPARE(octetsToString(999) , QString("999 B"));
-        QCOMPARE(octetsToString(1024) , QString("1 KB"));
-        QCOMPARE(octetsToString(1110) , QString("1 KB"));
-        QCOMPARE(octetsToString(1364) , QString("1 KB"));
-
-        QCOMPARE(octetsToString(9110) , QString("9 KB"));
-        QCOMPARE(octetsToString(9910) , QString("10 KB"));
-        QCOMPARE(octetsToString(9999) , QString("10 KB"));
-        QCOMPARE(octetsToString(10240) , QString("10 KB"));
-
-        QCOMPARE(octetsToString(123456) , QString("121 KB"));
-        QCOMPARE(octetsToString(1234567) , QString("1.2 MB"));
-        QCOMPARE(octetsToString(12345678) , QString("12 MB"));
-        QCOMPARE(octetsToString(123456789) , QString("118 MB"));
-        QCOMPARE(octetsToString(1000LL*1000*1000 * 5) , QString("4.7 GB"));
-
-        QCOMPARE(octetsToString(1), QString("1 B"));
-        QCOMPARE(octetsToString(2), QString("2 B"));
-        QCOMPARE(octetsToString(1024), QString("1 KB"));
-        QCOMPARE(octetsToString(1024*1024), QString("1 MB"));
-        QCOMPARE(octetsToString(1024LL*1024*1024), QString("1 GB"));
-        QCOMPARE(octetsToString(1024LL*1024*1024*1024), QString("1 TB"));
-        QCOMPARE(octetsToString(1024LL*1024*1024*1024 * 5), QString("5 TB"));
+        QCOMPARE(octetsToString(999) , QStringLiteral("999 B"));
+        QCOMPARE(octetsToString(1024) , QStringLiteral("1 KB"));
+        QCOMPARE(octetsToString(1110) , QStringLiteral("1 KB"));
+        QCOMPARE(octetsToString(1364) , QStringLiteral("1 KB"));
+
+        QCOMPARE(octetsToString(9110) , QStringLiteral("9 KB"));
+        QCOMPARE(octetsToString(9910) , QStringLiteral("10 KB"));
+        QCOMPARE(octetsToString(9999) , QStringLiteral("10 KB"));
+        QCOMPARE(octetsToString(10240) , QStringLiteral("10 KB"));
+
+        QCOMPARE(octetsToString(123456) , QStringLiteral("121 KB"));
+        QCOMPARE(octetsToString(1234567) , QStringLiteral("1.2 MB"));
+        QCOMPARE(octetsToString(12345678) , QStringLiteral("12 MB"));
+        QCOMPARE(octetsToString(123456789) , QStringLiteral("118 MB"));
+        QCOMPARE(octetsToString(1000LL*1000*1000 * 5) , QStringLiteral("4.7 GB"));
+
+        QCOMPARE(octetsToString(1), QStringLiteral("1 B"));
+        QCOMPARE(octetsToString(2), QStringLiteral("2 B"));
+        QCOMPARE(octetsToString(1024), QStringLiteral("1 KB"));
+        QCOMPARE(octetsToString(1024*1024), QStringLiteral("1 MB"));
+        QCOMPARE(octetsToString(1024LL*1024*1024), QStringLiteral("1 GB"));
+        QCOMPARE(octetsToString(1024LL*1024*1024*1024), QStringLiteral("1 TB"));
+        QCOMPARE(octetsToString(1024LL*1024*1024*1024 * 5), QStringLiteral("5 TB"));
     }
 
     void testLaunchOnStartup()
@@ -88,35 +88,35 @@ private slots:
 
         QDateTime current = QDateTime::currentDateTimeUtc();
 
-        QCOMPARE(durationToDescriptiveString2(0), QString("0 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(5), QString("0 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(1000), QString("1 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(1005), QString("1 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(56123), QString("56 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(90*sec), QString("1 minute(s) 30 second(s)") );
-        QCOMPARE(durationToDescriptiveString2(3*hour), QString("3 hour(s)") );
-        QCOMPARE(durationToDescriptiveString2(3*hour + 20*sec), QString("3 hour(s)") );
-        QCOMPARE(durationToDescriptiveString2(3*hour + 70*sec), QString("3 hour(s) 1 minute(s)") );
-        QCOMPARE(durationToDescriptiveString2(3*hour + 100*sec), QString("3 hour(s) 2 minute(s)") );
+        QCOMPARE(durationToDescriptiveString2(0), QStringLiteral("0 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(5), QStringLiteral("0 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(1000), QStringLiteral("1 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(1005), QStringLiteral("1 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(56123), QStringLiteral("56 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(90*sec), QStringLiteral("1 minute(s) 30 second(s)") );
+        QCOMPARE(durationToDescriptiveString2(3*hour), QStringLiteral("3 hour(s)") );
+        QCOMPARE(durationToDescriptiveString2(3*hour + 20*sec), QStringLiteral("3 hour(s)") );
+        QCOMPARE(durationToDescriptiveString2(3*hour + 70*sec), QStringLiteral("3 hour(s) 1 minute(s)") );
+        QCOMPARE(durationToDescriptiveString2(3*hour + 100*sec), QStringLiteral("3 hour(s) 2 minute(s)") );
         QCOMPARE(durationToDescriptiveString2(current.msecsTo(current.addYears(4).addMonths(5).addDays(2).addSecs(23*60*60))),
-                 QString("4 year(s) 5 month(s)") );
+                 QStringLiteral("4 year(s) 5 month(s)") );
         QCOMPARE(durationToDescriptiveString2(current.msecsTo(current.addDays(2).addSecs(23*60*60))),
-                 QString("2 day(s) 23 hour(s)") );
-
-        QCOMPARE(durationToDescriptiveString1(0), QString("0 second(s)") );
-        QCOMPARE(durationToDescriptiveString1(5), QString("0 second(s)") );
-        QCOMPARE(durationToDescriptiveString1(1000), QString("1 second(s)") );
-        QCOMPARE(durationToDescriptiveString1(1005), QString("1 second(s)") );
-        QCOMPARE(durationToDescriptiveString1(56123), QString("56 second(s)") );
-        QCOMPARE(durationToDescriptiveString1(90*sec), QString("2 minute(s)") );
-        QCOMPARE(durationToDescriptiveString1(3*hour), QString("3 hour(s)") );
-        QCOMPARE(durationToDescriptiveString1(3*hour + 20*sec), QString("3 hour(s)") );
-        QCOMPARE(durationToDescriptiveString1(3*hour + 70*sec), QString("3 hour(s)") );
-        QCOMPARE(durationToDescriptiveString1(3*hour + 100*sec), QString("3 hour(s)") );
+                 QStringLiteral("2 day(s) 23 hour(s)") );
+
+        QCOMPARE(durationToDescriptiveString1(0), QStringLiteral("0 second(s)") );
+        QCOMPARE(durationToDescriptiveString1(5), QStringLiteral("0 second(s)") );
+        QCOMPARE(durationToDescriptiveString1(1000), QStringLiteral("1 second(s)") );
+        QCOMPARE(durationToDescriptiveString1(1005), QStringLiteral("1 second(s)") );
+        QCOMPARE(durationToDescriptiveString1(56123), QStringLiteral("56 second(s)") );
+        QCOMPARE(durationToDescriptiveString1(90*sec), QStringLiteral("2 minute(s)") );
+        QCOMPARE(durationToDescriptiveString1(3*hour), QStringLiteral("3 hour(s)") );
+        QCOMPARE(durationToDescriptiveString1(3*hour + 20*sec), QStringLiteral("3 hour(s)") );
+        QCOMPARE(durationToDescriptiveString1(3*hour + 70*sec), QStringLiteral("3 hour(s)") );
+        QCOMPARE(durationToDescriptiveString1(3*hour + 100*sec), QStringLiteral("3 hour(s)") );
         QCOMPARE(durationToDescriptiveString1(current.msecsTo(current.addYears(4).addMonths(5).addDays(2).addSecs(23*60*60))),
-                 QString("4 year(s)") );
+                 QStringLiteral("4 year(s)") );
         QCOMPARE(durationToDescriptiveString1(current.msecsTo(current.addDays(2).addSecs(23*60*60))),
-                 QString("3 day(s)") );
+                 QStringLiteral("3 day(s)") );
 
     }