diff --git a/tests/linphone.pro b/tests/linphone.pro
index 5bb80b85b..6fb09055a 100644
--- a/tests/linphone.pro
+++ b/tests/linphone.pro
@@ -33,6 +33,7 @@ lupdate_only{
     ui/components/scrollBar/*.qml \
     ui/components/select/*.qml \
     ui/components/timeline/*.qml \
+    ui/style/collapse/*.qml \
     ui/views/*.qml \
     ui/views/mainWindow/*.qml
 }
diff --git a/tests/resources.qrc b/tests/resources.qrc
index 427e93006..801fc49fd 100644
--- a/tests/resources.qrc
+++ b/tests/resources.qrc
@@ -33,6 +33,8 @@
     <file>ui/components/form/DarkButton.qml</file>
     <file>ui/components/invertedMouseArea/InvertedMouseArea.qml</file>
     <file>ui/scripts/utils.js</file>
+    <file>ui/style/qmldir</file>
+    <file>ui/style/collapse/Style.qml</file>
     <file>ui/views/newCall.qml</file>
     <file>ui/views/manageAccounts.qml</file>
     <file>ui/views/mainWindow/mainWindow.qml</file>
diff --git a/tests/src/main.cpp b/tests/src/main.cpp
index a1d83cf3a..858db2cdd 100644
--- a/tests/src/main.cpp
+++ b/tests/src/main.cpp
@@ -1,5 +1,6 @@
 #include <cstdlib>
 
+#include <QQmlFileSelector>
 #include <QMenu>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
@@ -46,9 +47,15 @@ void setTrayIcon (QQmlApplicationEngine &engine) {
 }
 
 int main (int argc, char *argv[]) {
+  QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
   App app(argc, argv);
-  QQmlApplicationEngine engine(QUrl("qrc:/ui/views/mainWindow/mainWindow.qml"));
+  QQmlApplicationEngine engine;
 
+  // Provide `+custom` folders for custom components.
+  QQmlFileSelector *selector = new QQmlFileSelector(&engine);
+  selector->setExtraSelectors(QStringList("custom"));
+
+  engine.load(QUrl("qrc:/ui/views/mainWindow/mainWindow.qml"));
   if (engine.rootObjects().isEmpty())
     return EXIT_FAILURE;
 
diff --git a/tests/ui/components/collapse/Collapse.qml b/tests/ui/components/collapse/Collapse.qml
index def381519..558e32593 100644
--- a/tests/ui/components/collapse/Collapse.qml
+++ b/tests/ui/components/collapse/Collapse.qml
@@ -3,6 +3,8 @@ import QtQuick 2.7
 import 'qrc:/ui/components/form'
 import 'qrc:/ui/components/image'
 
+import 'qrc:/ui/style' as Style
+
 // ===================================================================
 
 Item {
@@ -18,9 +20,7 @@ Item {
 
     ActionButton {
         anchors.centerIn: parent
-        background: Rectangle {
-            color: 'transparent'
-        }
+        background: Style.CollapseStyle.background
         icon: 'collapse'
         iconSize: 32
         id: button
diff --git a/tests/ui/components/invertedMouseArea/InvertedMouseArea.qml b/tests/ui/components/invertedMouseArea/InvertedMouseArea.qml
index cf2c84417..ef9df855e 100644
--- a/tests/ui/components/invertedMouseArea/InvertedMouseArea.qml
+++ b/tests/ui/components/invertedMouseArea/InvertedMouseArea.qml
@@ -17,7 +17,6 @@ Item {
         }
 
         _mouseArea.parent = (function () {
-            // Search root.
             var root = item
 
             while (root.parent != null) {