diff --git a/src/calamares/testmain.cpp b/src/calamares/testmain.cpp
index 5671a591e..885915041 100644
--- a/src/calamares/testmain.cpp
+++ b/src/calamares/testmain.cpp
@@ -26,17 +26,22 @@
 #include "utils/Logger.h"
 #include "utils/Yaml.h"
 
+#include "Branding.h"
 #include "GlobalStorage.h"
 #include "Job.h"
 #include "JobQueue.h"
 #include "Settings.h"
 #include "ViewManager.h"
 
+#include "modulesystem/ModuleManager.h"
+
 #include <QApplication>
 #include <QCommandLineOption>
 #include <QCommandLineParser>
 #include <QCoreApplication>
 #include <QFileInfo>
+#include <QLabel>
+#include <QMainWindow>
 
 #include <memory>
 
@@ -51,13 +56,15 @@ struct ModuleConfig
     QString m_jobConfig;
     QString m_globalConfig;
     QString m_language;
+    QString m_branding;
+    bool m_ui;
 };
 
 static ModuleConfig
 handle_args( QCoreApplication& a )
 {
     QCommandLineOption debugLevelOption(
-        QStringLiteral( "D" ), "Verbose output for debugging purposes (0-8).", "level" );
+        QStringLiteral( "D" ), "Verbose output for debugging purposes (0-8), ignored.", "level" );
     QCommandLineOption globalOption( QStringList() << QStringLiteral( "g" ) << QStringLiteral( "global " ),
                                      QStringLiteral( "Global settings document" ),
                                      "global.yaml" );
@@ -67,6 +74,12 @@ handle_args( QCoreApplication& a )
     QCommandLineOption langOption( QStringList() << QStringLiteral( "l" ) << QStringLiteral( "language" ),
                                    QStringLiteral( "Language (global)" ),
                                    "languagecode" );
+    QCommandLineOption brandOption( QStringList() << QStringLiteral( "b" ) << QStringLiteral( "branding" ),
+                                    QStringLiteral( "Branding directory" ),
+                                    "path/to/branding.desc",
+                                    "src/branding/default/branding.desc" );
+    QCommandLineOption uiOption( QStringList() << QStringLiteral( "U" ) << QStringLiteral( "ui" ),
+                                 QStringLiteral( "Enable UI" ) );
 
     QCommandLineParser parser;
     parser.setApplicationDescription( "Calamares module tester" );
@@ -77,27 +90,13 @@ handle_args( QCoreApplication& a )
     parser.addOption( globalOption );
     parser.addOption( jobOption );
     parser.addOption( langOption );
+    parser.addOption( brandOption );
+    parser.addOption( uiOption );
     parser.addPositionalArgument( "module", "Path or name of module to run." );
     parser.addPositionalArgument( "job.yaml", "Path of job settings document to use.", "[job.yaml]" );
 
     parser.process( a );
 
-    if ( parser.isSet( debugLevelOption ) )
-    {
-        bool ok = true;
-        unsigned int l = parser.value( debugLevelOption ).toUInt( &ok );
-        unsigned int dlevel = 0;
-        if ( !ok )
-        {
-            dlevel = Logger::LOGVERBOSE;
-        }
-        else
-        {
-            dlevel = l;
-        }
-        Logger::setupLogLevel( dlevel );
-    }
-
     const QStringList args = parser.positionalArguments();
     if ( args.isEmpty() )
     {
@@ -117,7 +116,12 @@ handle_args( QCoreApplication& a )
             jobSettings = args.at( 1 );
         }
 
-        return ModuleConfig { args.first(), jobSettings, parser.value( globalOption ), parser.value( langOption ) };
+        return ModuleConfig { args.first(),
+                              jobSettings,
+                              parser.value( globalOption ),
+                              parser.value( langOption ),
+                              parser.value( brandOption ),
+                              parser.isSet( uiOption ) };
     }
 }
 
@@ -184,13 +188,38 @@ load_module( const ModuleConfig& moduleConfig )
     return module;
 }
 
+/** @brief Create the right kind of QApplication
+ *
+ * Does primitive parsing of argv[] to find the --ui option and returns
+ * a UI-enabled application if it does.
+ *
+ * @p argc must be a reference (to main's argc) because the QCoreApplication
+ * constructors take a reference as well, and that would otherwise be a
+ * reference to a temporary.
+ */
+QCoreApplication*
+createApplication( int& argc, char* argv[] )
+{
+    for ( int i = 1; i < argc; ++i )
+    {
+        if ( !qstrcmp( argv[ i ], "--ui" ) || !qstrcmp( argv[ i ], "-U" ) )
+        {
+            auto* aw = new QApplication( argc, argv );
+            aw->setQuitOnLastWindowClosed( true );
+            return aw;
+        }
+    }
+    return new QCoreApplication( argc, argv );
+}
+
 int
 main( int argc, char* argv[] )
 {
-    QCoreApplication a( argc, argv );
-    QApplication* aw = nullptr;
+    QCoreApplication* aw = createApplication( argc, argv );
 
-    ModuleConfig module = handle_args( a );
+    Logger::setupLogLevel( Logger::LOGVERBOSE );
+
+    ModuleConfig module = handle_args( *aw );
     if ( module.moduleName().isEmpty() )
     {
         return 1;
@@ -198,6 +227,7 @@ main( int argc, char* argv[] )
 
     std::unique_ptr< Calamares::Settings > settings_p( new Calamares::Settings( QString(), true ) );
     std::unique_ptr< Calamares::JobQueue > jobqueue_p( new Calamares::JobQueue( nullptr ) );
+    QMainWindow* mw = nullptr;
 
     auto gs = jobqueue_p->globalStorage();
     if ( !module.globalConfigFile().isEmpty() )
@@ -223,8 +253,11 @@ main( int argc, char* argv[] )
     cDebug() << " .. got" << m->name() << m->typeString() << m->interfaceString();
     if ( m->type() == Calamares::Module::Type::View )
     {
-        aw = new QApplication( argc, argv );
-        (void)Calamares::ViewManager::instance( nullptr );
+        mw = module.m_ui ? new QMainWindow() : nullptr;
+
+        (void)new Calamares::Branding( module.m_branding );
+        (void)new Calamares::ModuleManager( QStringList(), nullptr );
+        (void)Calamares::ViewManager::instance( mw );
     }
 
     if ( !m->isLoaded() )
@@ -238,6 +271,16 @@ main( int argc, char* argv[] )
         return 1;
     }
 
+    if ( mw )
+    {
+        QWidget* w = Calamares::ViewManager::instance()->currentStep()->widget();
+        w->setParent( mw );
+        mw->setCentralWidget( w );
+        w->show();
+        mw->show();
+        return aw->exec();
+    }
+
     using TR = Logger::DebugRow< const char*, const QString >;
 
     cDebug() << "Module metadata" << TR( "name", m->name() ) << TR( "type", m->typeString() )
diff --git a/src/modules/license/LicensePage.cpp b/src/modules/license/LicensePage.cpp
index 3c241e467..2cc025f83 100644
--- a/src/modules/license/LicensePage.cpp
+++ b/src/modules/license/LicensePage.cpp
@@ -21,11 +21,11 @@
 
 #include "LicensePage.h"
 
-#include "ui_LicensePage.h"
 #include "LicenseWidget.h"
+#include "ui_LicensePage.h"
 
-#include "JobQueue.h"
 #include "GlobalStorage.h"
+#include "JobQueue.h"
 #include "ViewManager.h"
 
 #include "utils/CalamaresUtilsGui.h"
@@ -36,10 +36,10 @@
 
 #include <QApplication>
 #include <QBoxLayout>
+#include <QComboBox>
 #include <QDesktopServices>
 #include <QFocusEvent>
 #include <QLabel>
-#include <QComboBox>
 #include <QMessageBox>
 
 #include <algorithm>
@@ -47,11 +47,11 @@
 const NamedEnumTable< LicenseEntry::Type >&
 LicenseEntry::typeNames()
 {
-    static const NamedEnumTable< LicenseEntry::Type > names{
-        { QStringLiteral( "software" ), LicenseEntry::Type::Software},
+    static const NamedEnumTable< LicenseEntry::Type > names {
+        { QStringLiteral( "software" ), LicenseEntry::Type::Software },
         { QStringLiteral( "driver" ), LicenseEntry::Type::Driver },
         { QStringLiteral( "gpudriver" ), LicenseEntry::Type::GpuDriver },
-        { QStringLiteral( "browserplugin" ), LicenseEntry::Type::BrowserPlugin},
+        { QStringLiteral( "browserplugin" ), LicenseEntry::Type::BrowserPlugin },
         { QStringLiteral( "codec" ), LicenseEntry::Type::Codec },
         { QStringLiteral( "package" ), LicenseEntry::Type::Package }
     };
@@ -59,10 +59,12 @@ LicenseEntry::typeNames()
     return names;
 }
 
-LicenseEntry::LicenseEntry(const QVariantMap& conf)
+LicenseEntry::LicenseEntry( const QVariantMap& conf )
 {
     if ( !conf.contains( "id" ) || !conf.contains( "name" ) || !conf.contains( "url" ) )
+    {
         return;
+    }
 
     m_id = conf[ "id" ].toString();
     m_prettyName = conf[ "name" ].toString();
@@ -75,7 +77,9 @@ LicenseEntry::LicenseEntry(const QVariantMap& conf)
     QString typeString = conf.value( "type", "software" ).toString();
     m_type = typeNames().find( typeString, ok );
     if ( !ok )
+    {
         cWarning() << "License entry" << m_id << "has unknown type" << typeString << "(using 'software')";
+    }
 }
 
 bool
@@ -85,7 +89,7 @@ LicenseEntry::isLocal() const
 }
 
 
-LicensePage::LicensePage(QWidget *parent)
+LicensePage::LicensePage( QWidget* parent )
     : QWidget( parent )
     , m_isNextEnabled( false )
     , m_allLicensesOptional( false )
@@ -119,9 +123,7 @@ LicensePage::LicensePage(QWidget *parent)
 
     connect( ui->acceptCheckBox, &QCheckBox::toggled, this, &LicensePage::checkAcceptance );
 
-    CALAMARES_RETRANSLATE(
-        ui->acceptCheckBox->setText( tr( "I accept the terms and conditions above." ) );
-    )
+    CALAMARES_RETRANSLATE( ui->acceptCheckBox->setText( tr( "I accept the terms and conditions above." ) ); )
 }
 
 
@@ -132,41 +134,40 @@ LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
     m_entries.clear();
     m_entries.reserve( entriesList.count() );
 
-    const bool required = std::any_of( entriesList.cbegin(), entriesList.cend(), []( const LicenseEntry& e ){ return e.m_required; });
+    const bool required
+        = std::any_of( entriesList.cbegin(), entriesList.cend(), []( const LicenseEntry& e ) { return e.m_required; } );
     if ( entriesList.isEmpty() )
+    {
         m_allLicensesOptional = true;
+    }
     else
+    {
         m_allLicensesOptional = !required;
+    }
 
     checkAcceptance( false );
 
-    CALAMARES_RETRANSLATE(
-        if ( required )
-        {
-            ui->mainText->setText( tr( "<h1>License Agreement</h1>"
-                "This setup procedure will install proprietary "
-                "software that is subject to licensing terms." ) );
-            ui->additionalText->setText( tr( "Please review the End User License "
-                "Agreements (EULAs) above.<br/>"
-                "If you do not agree with the terms, the setup procedure cannot continue." ) );
-        }
-        else
-        {
-            ui->mainText->setText( tr( "<h1>License Agreement</h1>"
-                "This setup procedure can install proprietary "
-                "software that is subject to licensing terms "
-                "in order to provide additional features and enhance the user "
-                "experience." ) );
-            ui->additionalText->setText( tr( "Please review the End User License "
-                "Agreements (EULAs) above.<br/>"
-                "If you do not agree with the terms, proprietary software will not "
-                "be installed, and open source alternatives will be used instead." ) );
-        }
-        ui->retranslateUi( this );
+    CALAMARES_RETRANSLATE( if ( required ) {
+        ui->mainText->setText( tr( "<h1>License Agreement</h1>"
+                                   "This setup procedure will install proprietary "
+                                   "software that is subject to licensing terms." ) );
+        ui->additionalText->setText( tr( "Please review the End User License "
+                                         "Agreements (EULAs) above.<br/>"
+                                         "If you do not agree with the terms, the setup procedure cannot continue." ) );
+    } else {
+        ui->mainText->setText( tr( "<h1>License Agreement</h1>"
+                                   "This setup procedure can install proprietary "
+                                   "software that is subject to licensing terms "
+                                   "in order to provide additional features and enhance the user "
+                                   "experience." ) );
+        ui->additionalText->setText( tr( "Please review the End User License "
+                                         "Agreements (EULAs) above.<br/>"
+                                         "If you do not agree with the terms, proprietary software will not "
+                                         "be installed, and open source alternatives will be used instead." ) );
+    } ui->retranslateUi( this );
 
-        for ( const auto& w : m_entries )
-            w->retranslateUi();
-    )
+                           for ( const auto& w
+                                 : m_entries ) w->retranslateUi(); )
 
     for ( const LicenseEntry& entry : entriesList )
     {
@@ -190,7 +191,8 @@ LicensePage::updateGlobalStorage( bool v )
     Calamares::JobQueue::instance()->globalStorage()->insert( "licenseAgree", v );
 }
 
-void LicensePage::checkAcceptance( bool checked )
+void
+LicensePage::checkAcceptance( bool checked )
 {
     updateGlobalStorage( checked );
 
diff --git a/src/modules/license/LicensePage.h b/src/modules/license/LicensePage.h
index e595f7ad8..bd9543937 100644
--- a/src/modules/license/LicensePage.h
+++ b/src/modules/license/LicensePage.h
@@ -24,8 +24,8 @@
 
 #include "utils/NamedEnum.h"
 
-#include <QWidget>
 #include <QUrl>
+#include <QWidget>
 
 namespace Ui
 {
@@ -101,4 +101,4 @@ private:
     QList< LicenseWidget* > m_entries;
 };
 
-#endif //LICENSEPAGE_H
+#endif  //LICENSEPAGE_H
diff --git a/src/modules/license/LicenseViewStep.cpp b/src/modules/license/LicenseViewStep.cpp
index f5f4b6e2b..89cddf27f 100644
--- a/src/modules/license/LicenseViewStep.cpp
+++ b/src/modules/license/LicenseViewStep.cpp
@@ -19,29 +19,30 @@
 
 #include "LicenseViewStep.h"
 
-#include "LicensePage.h"
-#include "JobQueue.h"
 #include "GlobalStorage.h"
+#include "JobQueue.h"
+#include "LicensePage.h"
 #include "utils/Logger.h"
 
 #include <QVariantMap>
 
-CALAMARES_PLUGIN_FACTORY_DEFINITION( LicenseViewStepFactory, registerPlugin<LicenseViewStep>(); )
+CALAMARES_PLUGIN_FACTORY_DEFINITION( LicenseViewStepFactory, registerPlugin< LicenseViewStep >(); )
 
 LicenseViewStep::LicenseViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_widget( new LicensePage )
 {
     emit nextStatusChanged( false );
-    connect( m_widget, &LicensePage::nextStatusChanged,
-             this, &LicenseViewStep::nextStatusChanged );
+    connect( m_widget, &LicensePage::nextStatusChanged, this, &LicenseViewStep::nextStatusChanged );
 }
 
 
 LicenseViewStep::~LicenseViewStep()
 {
     if ( m_widget && m_widget->parent() == nullptr )
+    {
         m_widget->deleteLater();
+    }
 }
 
 
@@ -97,18 +98,21 @@ void
 LicenseViewStep::setConfigurationMap( const QVariantMap& configurationMap )
 {
     QList< LicenseEntry > entriesList;
-    if ( configurationMap.contains( "entries" ) &&
-         configurationMap.value( "entries" ).type() == QVariant::List )
+    if ( configurationMap.contains( "entries" ) && configurationMap.value( "entries" ).type() == QVariant::List )
     {
         const auto entries = configurationMap.value( "entries" ).toList();
         for ( const QVariant& entryV : entries )
         {
             if ( entryV.type() != QVariant::Map )
+            {
                 continue;
+            }
 
             LicenseEntry entry( entryV.toMap() );
             if ( entry.isValid() )
+            {
                 entriesList.append( entry );
+            }
         }
     }
 
diff --git a/src/modules/license/LicenseViewStep.h b/src/modules/license/LicenseViewStep.h
index a4fabc8e1..957110f3d 100644
--- a/src/modules/license/LicenseViewStep.h
+++ b/src/modules/license/LicenseViewStep.h
@@ -20,9 +20,9 @@
 #ifndef LICENSEPAGEPLUGIN_H
 #define LICENSEPAGEPLUGIN_H
 
+#include <PluginDllMacro.h>
 #include <utils/PluginFactory.h>
 #include <viewpages/ViewStep.h>
-#include <PluginDllMacro.h>
 
 #include <QObject>
 #include <QUrl>
@@ -58,4 +58,4 @@ private:
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( LicenseViewStepFactory )
 
-#endif // LICENSEPAGEPLUGIN_H
+#endif  // LICENSEPAGEPLUGIN_H
diff --git a/src/modules/license/LicenseWidget.cpp b/src/modules/license/LicenseWidget.cpp
index 238d57b07..25509be95 100644
--- a/src/modules/license/LicenseWidget.cpp
+++ b/src/modules/license/LicenseWidget.cpp
@@ -34,10 +34,12 @@ static QString
 loadLocalFile( const QUrl& u )
 {
     if ( !u.isLocalFile() )
+    {
         return QString();
+    }
 
     QFile file( u.path() );
-    if ( !file.open(QIODevice::ReadOnly | QIODevice::Text) )
+    if ( !file.open( QIODevice::ReadOnly | QIODevice::Text ) )
     {
         cWarning() << "Could not load license file" << u.path();
         return QString();
@@ -108,11 +110,10 @@ LicenseWidget::LicenseWidget( LicenseEntry entry, QWidget* parent )
     retranslateUi();
 }
 
-LicenseWidget::~LicenseWidget()
-{
-}
+LicenseWidget::~LicenseWidget() {}
 
-void LicenseWidget::retranslateUi()
+void
+LicenseWidget::retranslateUi()
 {
     QString productDescription;
     switch ( m_entry.m_type )
@@ -120,40 +121,40 @@ void LicenseWidget::retranslateUi()
     case LicenseEntry::Type::Driver:
         //: %1 is an untranslatable product name, example: Creative Audigy driver
         productDescription = tr( "<strong>%1 driver</strong><br/>"
-                                    "by %2" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "by %2" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
         break;
     case LicenseEntry::Type::GpuDriver:
         //: %1 is usually a vendor name, example: Nvidia graphics driver
         productDescription = tr( "<strong>%1 graphics driver</strong><br/>"
-                                    "<font color=\"Grey\">by %2</font>" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "<font color=\"Grey\">by %2</font>" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
         break;
     case LicenseEntry::Type::BrowserPlugin:
         productDescription = tr( "<strong>%1 browser plugin</strong><br/>"
-                                    "<font color=\"Grey\">by %2</font>" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "<font color=\"Grey\">by %2</font>" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
         break;
     case LicenseEntry::Type::Codec:
         productDescription = tr( "<strong>%1 codec</strong><br/>"
-                                    "<font color=\"Grey\">by %2</font>" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "<font color=\"Grey\">by %2</font>" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
         break;
     case LicenseEntry::Type::Package:
         productDescription = tr( "<strong>%1 package</strong><br/>"
-                                    "<font color=\"Grey\">by %2</font>" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "<font color=\"Grey\">by %2</font>" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
         break;
     case LicenseEntry::Type::Software:
         productDescription = tr( "<strong>%1</strong><br/>"
-                                    "<font color=\"Grey\">by %2</font>" )
-                                .arg( m_entry.m_prettyName )
-                                .arg( m_entry.m_prettyVendor );
+                                 "<font color=\"Grey\">by %2</font>" )
+                                 .arg( m_entry.m_prettyName )
+                                 .arg( m_entry.m_prettyVendor );
     }
     m_label->setText( productDescription );
     updateExpandToolTip();
@@ -173,7 +174,9 @@ LicenseWidget::expandClicked()
 
     // Show/hide based on the new arrow direction.
     if ( m_fullText )
+    {
         m_fullText->setHidden( m_expandLicenseButton->arrowType() == Qt::UpArrow );
+    }
 
     updateExpandToolTip();
 }
@@ -186,21 +189,15 @@ LicenseWidget::updateExpandToolTip()
     {
         const bool isNowCollapsed = m_expandLicenseButton->arrowType() == Qt::UpArrow;
 
-        m_expandLicenseButton->setToolTip(
-            isNowCollapsed
-            ? tr( "Shows the complete license text" )
-            : tr( "Hide license text" )
-            ) ;
-        m_viewLicenseLabel->setText(
-            isNowCollapsed
-            ? tr( "Show license agreement" )
-            : tr( "Hide license agreement" ) );
+        m_expandLicenseButton->setToolTip( isNowCollapsed ? tr( "Shows the complete license text" )
+                                                          : tr( "Hide license text" ) );
+        m_viewLicenseLabel->setText( isNowCollapsed ? tr( "Show license agreement" ) : tr( "Hide license agreement" ) );
     }
     else
     {
         m_expandLicenseButton->setToolTip( tr( "Opens the license agreement in a browser window." ) );
-        m_viewLicenseLabel->setText( tr( "<a href=\"%1\">View license agreement</a>" )
-                                .arg( m_entry.m_url.toString() ) );
+        m_viewLicenseLabel->setText(
+            tr( "<a href=\"%1\">View license agreement</a>" ).arg( m_entry.m_url.toString() ) );
     }
 }
 
diff --git a/src/modules/license/LicenseWidget.h b/src/modules/license/LicenseWidget.h
index c43233da4..e11d7a746 100644
--- a/src/modules/license/LicenseWidget.h
+++ b/src/modules/license/LicenseWidget.h
@@ -39,7 +39,7 @@ public:
 
 private:
     void expandClicked();  // "slot" to toggle show/hide of local license text
-    void viewClicked();    // "slot" to open link
+    void viewClicked();  // "slot" to open link
     void updateExpandToolTip();
 
     LicenseEntry m_entry;
@@ -47,5 +47,5 @@ private:
     QLabel* m_viewLicenseLabel;
     QToolButton* m_expandLicenseButton;
     QLabel* m_fullText;
-} ;
+};
 #endif