diff --git a/tests/Avalonia.DesignerSupport.TestApp/App.xaml b/tests/Avalonia.DesignerSupport.TestApp/App.xaml
index 56c0e8059a..5a33ffff80 100644
--- a/tests/Avalonia.DesignerSupport.TestApp/App.xaml
+++ b/tests/Avalonia.DesignerSupport.TestApp/App.xaml
@@ -1,8 +1,10 @@
-<Application xmlns="https://github.com/avaloniaui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             x:Class="Avalonia.DesignerSupport.TestApp.App">
+<Application
+    x:Class="Avalonia.DesignerSupport.TestApp.App"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Application.Styles>
-        <StyleInclude Source="resm:Avalonia.Themes.Default.DefaultTheme.xaml?assembly=Avalonia.Themes.Default"/>
-        <StyleInclude Source="resm:Avalonia.Themes.Default.Accents.BaseLight.xaml?assembly=Avalonia.Themes.Default"/>
+        <StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml" />
+        <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/Base.xaml" />
+        <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseLight.xaml" />
     </Application.Styles>
 </Application>