diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/DynamicResourceExtensionTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/DynamicResourceExtensionTests.cs
index 987725c314..f2e1a99006 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/DynamicResourceExtensionTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/DynamicResourceExtensionTests.cs
@@ -250,30 +250,32 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void DynamicResource_Can_Be_Assigned_To_Setter_In_Styles_File()
         {
-            var styleXaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
 <Styles xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Styles.Resources>
         <SolidColorBrush x:Key='brush'>#ff506070</SolidColorBrush>
     </Styles.Resources>
-
     <Style Selector='Border'>
         <Setter Property='Background' Value='{DynamicResource brush}'/>
     </Style>
-</Styles>";
-
-            using (StyledWindow(assets: ("test:style.xaml", styleXaml)))
-            {
-                var xaml = @"
+</Styles>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style.xaml'/>
+        <StyleInclude Source='avares://Tests/Style.xaml'/>
     </Window.Styles>
     <Border Name='border'/>
-</Window>";
-
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+</Window>")
+            };
+            
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[1]);
                 var border = window.FindControl<Border>("border");
                 var brush = (ISolidColorBrush)border.Background;
 
@@ -284,13 +286,14 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void DynamicResource_Can_Be_Assigned_To_Property_In_ControlTemplate_In_Styles_File()
         {
-            var styleXaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
 <Styles xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Styles.Resources>
         <SolidColorBrush x:Key='brush'>#ff506070</SolidColorBrush>
     </Styles.Resources>
-
     <Style Selector='Button'>
         <Setter Property='Template'>
             <ControlTemplate>
@@ -298,20 +301,21 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
             </ControlTemplate>
         </Setter>
     </Style>
-</Styles>";
-
-            using (StyledWindow(assets: ("test:style.xaml", styleXaml)))
-            {
-                var xaml = @"
+</Styles>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style.xaml'/>
+        <StyleInclude Source='avares://Tests/Style.xaml'/>
     </Window.Styles>
     <Button Name='button'/>
-</Window>";
-
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+</Window>")
+            };
+            
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[1]);
                 var button = window.FindControl<Button>("button");
 
                 window.Show();
@@ -553,35 +557,37 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void DynamicResource_Can_Be_Found_Across_Xaml_Style_Files()
         {
-            var style1Xaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style1.xaml"), @"
 <Style xmlns='https://github.com/avaloniaui'
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
   <Style.Resources>
     <Color x:Key='Red'>Red</Color>
   </Style.Resources>
-</Style>";
-            var style2Xaml = @"
+</Style>"),
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style2.xaml"), @"
 <Style xmlns='https://github.com/avaloniaui'
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
   <Style.Resources>
     <SolidColorBrush x:Key='RedBrush' Color='{DynamicResource Red}'/>
   </Style.Resources>
-</Style>";
-            using (StyledWindow(
-                ("test:style1.xaml", style1Xaml), 
-                ("test:style2.xaml", style2Xaml)))
-            {
-                var xaml = @"
+</Style>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style1.xaml'/>
-        <StyleInclude Source='test:style2.xaml'/>
+        <StyleInclude Source='avares://Tests/Style1.xaml'/>
+        <StyleInclude Source='avares://Tests/Style2.xaml'/>
     </Window.Styles>
     <Border Name='border' Background='{DynamicResource RedBrush}'/>
-</Window>";
-
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+</Window>")
+            };
+            
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[2]);
                 var border = window.FindControl<Border>("border");
                 var borderBrush = (ISolidColorBrush)border.Background;
 
@@ -593,33 +599,35 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void DynamicResource_Can_Be_Found_In_Nested_Style_File()
         {
-            var style1Xaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style1.xaml"), @"
 <Styles xmlns='https://github.com/avaloniaui'
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
-  <StyleInclude Source='test:style2.xaml'/>
-</Styles>";
-            var style2Xaml = @"
+  <StyleInclude Source='avares://Tests/Style2.xaml'/>
+</Styles>"),
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style2.xaml"), @"
 <Style xmlns='https://github.com/avaloniaui'
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
   <Style.Resources>
     <Color x:Key='Red'>Red</Color>
     <SolidColorBrush x:Key='RedBrush' Color='{DynamicResource Red}'/>
   </Style.Resources>
-</Style>";
-            using (StyledWindow(
-                ("test:style1.xaml", style1Xaml),
-                ("test:style2.xaml", style2Xaml)))
-            {
-                var xaml = @"
+</Style>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style1.xaml'/>
+        <StyleInclude Source='avares://Tests/Style1.xaml'/>
     </Window.Styles>
     <Border Name='border' Background='{DynamicResource RedBrush}'/>
-</Window>";
-
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+</Window>")
+            };
+            
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[2]);
                 var border = window.FindControl<Border>("border");
                 var borderBrush = (ISolidColorBrush)border.Background;
 
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/ResourceIncludeTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/ResourceIncludeTests.cs
index d8ecba36f5..ac4000b4c6 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/ResourceIncludeTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/ResourceIncludeTests.cs
@@ -14,29 +14,32 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
             [Fact]
             public void ResourceInclude_Loads_ResourceDictionary()
             {
-                var includeXaml = @"
+                var documents = new[]
+                {
+                    new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Resource.xaml"), @"
 <ResourceDictionary xmlns='https://github.com/avaloniaui'
                     xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <SolidColorBrush x:Key='brush'>#ff506070</SolidColorBrush>
-</ResourceDictionary>
-";
-                using (StartWithResources(("test:include.xaml", includeXaml)))
-                {
-                    var xaml = @"
+</ResourceDictionary>"),
+                    new RuntimeXamlLoaderDocument(@"
 <UserControl xmlns='https://github.com/avaloniaui'
              xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <UserControl.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ResourceInclude Source='test:include.xaml'/>
+                <ResourceInclude Source='avares://Tests/Resource.xaml'/>
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </UserControl.Resources>
 
     <Border Name='border' Background='{StaticResource brush}'/>
-</UserControl>";
+</UserControl>")
+                };
 
-                    var userControl = (UserControl)AvaloniaRuntimeXamlLoader.Load(xaml);
+                using (StartWithResources())
+                {
+                    var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                    var userControl = Assert.IsType<UserControl>(compiled[1]);
                     var border = userControl.FindControl<Border>("border");
 
                     var brush = (ISolidColorBrush)border.Background;
@@ -47,31 +50,32 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
             [Fact]
             public void Missing_ResourceKey_In_ResourceInclude_Does_Not_Cause_StackOverflow()
             {
-                var styleXaml = @"
+                var app = Application.Current;
+                var documents = new[]
+                {
+                    new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Resource.xaml"), @"
 <ResourceDictionary xmlns='https://github.com/avaloniaui'
                     xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <StaticResource x:Key='brush' ResourceKey='missing' />
-</ResourceDictionary>";
-
-                using (StartWithResources(("test:style.xaml", styleXaml)))
-                {
-                    var xaml = @"
+</ResourceDictionary>"),
+                    new RuntimeXamlLoaderDocument(app, @"
 <Application xmlns='https://github.com/avaloniaui'
              xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ResourceInclude Source='test:style.xaml'/>
+                <ResourceInclude Source='avares://Tests/Resource.xaml'/>
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Application.Resources>
-</Application>";
-
-                    var app = Application.Current;
+</Application>")
+                };
 
+                using (StartWithResources())
+                {
                     try
                     {
-                        AvaloniaRuntimeXamlLoader.Load(xaml, null, app);
+                        AvaloniaRuntimeXamlLoader.LoadGroup(documents);
                     }
                     catch (KeyNotFoundException)
                     {
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/StaticResourceExtensionTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/StaticResourceExtensionTests.cs
index 340eac0d4f..b9afd5fdba 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/StaticResourceExtensionTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/MarkupExtensions/StaticResourceExtensionTests.cs
@@ -238,7 +238,9 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void StaticResource_Can_Be_Assigned_To_Setter_In_Styles_File()
         {
-            var styleXaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
 <Styles xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Styles.Resources>
@@ -248,20 +250,21 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
     <Style Selector='Border'>
         <Setter Property='Background' Value='{StaticResource brush}'/>
     </Style>
-</Styles>";
-
-            using (StyledWindow(assets: ("test:style.xaml", styleXaml)))
-            {
-                var xaml = @"
+</Styles>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style.xaml'/>
+        <StyleInclude Source='avares://Tests/Style.xaml'/>
     </Window.Styles>
     <Border Name='border'/>
-</Window>";
+</Window>")
+            };
 
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[1]);
                 var border = window.FindControl<Border>("border");
                 var brush = (ISolidColorBrush)border.Background;
 
@@ -311,7 +314,9 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
         [Fact]
         public void StaticResource_Can_Be_Assigned_To_Property_In_ControlTemplate_In_Styles_File()
         {
-            var styleXaml = @"
+            var documents = new[]
+            {
+                new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
 <Styles xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Styles.Resources>
@@ -325,20 +330,21 @@ namespace Avalonia.Markup.Xaml.UnitTests.MarkupExtensions
             </ControlTemplate>
         </Setter>
     </Style>
-</Styles>";
-
-            using (StyledWindow(assets: ("test:style.xaml", styleXaml)))
-            {
-                var xaml = @"
+</Styles>"),
+                new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Styles>
-        <StyleInclude Source='test:style.xaml'/>
+        <StyleInclude Source='avares://Tests/Style.xaml'/>
     </Window.Styles>
     <Button Name='button'/>
-</Window>";
-
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+</Window>")
+            };
+            
+            using (StyledWindow())
+            {
+                var compiled = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(compiled[1]);
                 var button = window.FindControl<Button>("button");
 
                 window.Show();
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/StyleIncludeTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/StyleIncludeTests.cs
deleted file mode 100644
index 239a109193..0000000000
--- a/tests/Avalonia.Markup.Xaml.UnitTests/StyleIncludeTests.cs
+++ /dev/null
@@ -1,51 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Avalonia.UnitTests;
-using Xunit;
-
-namespace Avalonia.Markup.Xaml.UnitTests
-{
-    public class StyleIncludeTests : XamlTestBase
-    {
-        [Fact]
-        public void Missing_ResourceKey_In_StyleInclude_Does_Not_Cause_StackOverflow()
-        {
-            var styleXaml = @"
-<Style xmlns='https://github.com/avaloniaui'
-       xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
-    <Style.Resources>
-        <StaticResource x:Key='brush' ResourceKey='missing' />
-    </Style.Resources>
-</Style>";
-
-            using (StartWithResources(("test:style.xaml", styleXaml)))
-            {
-                var xaml = @"
-<Application xmlns='https://github.com/avaloniaui'
-             xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
-    <Application.Styles>
-        <StyleInclude Source='test:style.xaml'/>
-    </Application.Styles>
-</Application>";
-
-                var app = Application.Current;
-
-                try
-                {
-                    AvaloniaRuntimeXamlLoader.Load(xaml, null, app);
-                }
-                catch (KeyNotFoundException)
-                {
-
-                }
-            }
-        }
-
-        private IDisposable StartWithResources(params (string, string)[] assets)
-        {
-            var assetLoader = new MockAssetLoader(assets);
-            var services = new TestServices(assetLoader: assetLoader);
-            return UnitTestApplication.Start(services);
-        }
-    }
-}
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/BasicTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/BasicTests.cs
index af133cca73..c7afaee697 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/BasicTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/BasicTests.cs
@@ -18,6 +18,7 @@ using System.Xml;
 using Xunit;
 using Avalonia.Controls.Documents;
 using Avalonia.Metadata;
+using Avalonia.Themes.Simple;
 
 namespace Avalonia.Markup.Xaml.UnitTests.Xaml
 {
@@ -458,27 +459,6 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
             Assert.Equal(10.0, d);
         }
 
-        [Fact]
-        public void StyleInclude_Is_Built()
-        {
-            using (UnitTestApplication.Start(TestServices.StyledWindow))
-            {
-                var xaml = @"
-<Styles xmlns='https://github.com/avaloniaui'
-        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
-    <StyleInclude Source='avares://Avalonia.Themes.Simple/Controls/UserControl.xaml'/>
-</Styles>";
-
-                var styles = AvaloniaRuntimeXamlLoader.Parse<Styles>(xaml);
-
-                Assert.True(styles.Count == 1);
-
-                var styleInclude = styles.First() as IStyle;
-
-                Assert.NotNull(styleInclude);
-            }
-        }
-
         [Fact]
         public void Simple_Xaml_Binding_Is_Operational()
         {
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs
index 5066341bbb..d74d85e2bc 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/ResourceDictionaryTests.cs
@@ -33,29 +33,32 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
         [Fact]
         public void DynamicResource_Finds_Resource_In_Parent_Dictionary()
         {
-            var dictionaryXaml = @"
+            using (StyledWindow())
+            {
+                var documents = new[]
+                {
+                    new RuntimeXamlLoaderDocument(new Uri("avares://Avalonia.Markup.Xaml.UnitTests/dict.xaml"), @"
 <ResourceDictionary xmlns='https://github.com/avaloniaui'
                     xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
   <SolidColorBrush x:Key='RedBrush' Color='{DynamicResource Red}'/>
-</ResourceDictionary>";
-
-            using (StyledWindow(assets: ("test:dict.xaml", dictionaryXaml)))
-            {
-                var xaml = @"
+</ResourceDictionary>"),
+                    new RuntimeXamlLoaderDocument(@"
 <Window xmlns='https://github.com/avaloniaui'
         xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
     <Window.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ResourceInclude Source='test:dict.xaml'/>
+                <ResourceInclude Source='avares://Avalonia.Markup.Xaml.UnitTests/dict.xaml'/>
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
         <Color x:Key='Red'>Red</Color>
     </Window.Resources>
     <Button Name='button' Background='{DynamicResource RedBrush}'/>
-</Window>";
+</Window>")
+                };
 
-                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+                var loaded = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+                var window = Assert.IsType<Window>(loaded[1]);
                 var button = window.FindControl<Button>("button");
 
                 var brush = Assert.IsType<SolidColorBrush>(button.Background);
@@ -276,7 +279,6 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
         private IDisposable StyledWindow(params (string, string)[] assets)
         {
             var services = TestServices.StyledWindow.With(
-                assetLoader: new MockAssetLoader(assets),
                 theme: () => new Styles
                 {
                     WindowStyle(),
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml
index 1f195c4605..fefd2021e2 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml
@@ -1,6 +1,5 @@
 <Style xmlns="https://github.com/avaloniaui"
-       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-       x:Precompile="False">
+       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <Style.Resources>
     <Color x:Key="Red">Red</Color>
     <Color x:Key="Green">Green</Color>
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style2.xaml b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style2.xaml
index 04db8fd2dd..f9abd5c63a 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style2.xaml
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/Style2.xaml
@@ -1,6 +1,5 @@
 <Style xmlns="https://github.com/avaloniaui"
-       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-       x:Precompile="False">
+       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <Style.Resources>
     <SolidColorBrush x:Key="RedBrush" Color="{DynamicResource Red}"/>
     <SolidColorBrush x:Key="GreenBrush" Color="{DynamicResource Green}"/>
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleIncludeTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleIncludeTests.cs
new file mode 100644
index 0000000000..4ff4405109
--- /dev/null
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleIncludeTests.cs
@@ -0,0 +1,184 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Avalonia.Controls;
+using Avalonia.Styling;
+using Avalonia.Themes.Simple;
+using Avalonia.UnitTests;
+using Xunit;
+
+namespace Avalonia.Markup.Xaml.UnitTests.Xaml;
+
+public class StyleIncludeTests
+{
+    [Fact]
+    public void StyleInclude_Is_Built()
+    {
+        using (UnitTestApplication.Start(TestServices.StyledWindow
+                   .With(theme: () => new Styles())))
+        {
+            var xaml = @"
+<ContentControl xmlns='https://github.com/avaloniaui'>
+    <ContentControl.Styles>
+        <StyleInclude Source='avares://Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml'/>
+    </ContentControl.Styles>
+</ContentControl>";
+
+            var window = AvaloniaRuntimeXamlLoader.Parse<ContentControl>(xaml);
+                
+            Assert.IsType<Style>(window.Styles[0]);
+        }
+    }
+        
+    [Fact]
+    public void StyleInclude_Is_Built_Resources()
+    {
+        using (UnitTestApplication.Start(TestServices.StyledWindow
+                   .With(theme: () => new Styles())))
+        {
+            var xaml = @"
+<ContentControl xmlns='https://github.com/avaloniaui'
+                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <ContentControl.Resources>
+        <StyleInclude x:Key='Include' Source='avares://Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml'/>
+    </ContentControl.Resources>
+</ContentControl>";
+
+            var contentControl = AvaloniaRuntimeXamlLoader.Parse<ContentControl>(xaml);
+
+            Assert.IsType<Style>(contentControl.Resources["Include"]);
+        }
+    }
+
+    [Fact]
+    public void StyleInclude_Is_Resolved_With_Two_Files()
+    {
+        var documents = new[]
+        {
+            new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
+<Style xmlns='https://github.com/avaloniaui'
+       xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Style.Resources>
+        <Color x:Key='Red'>Red</Color>
+    </Style.Resources>
+</Style>"),
+            new RuntimeXamlLoaderDocument(@"
+<ContentControl xmlns='https://github.com/avaloniaui'
+                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <ContentControl.Resources>
+        <StyleInclude x:Key='Include' Source='avares://Tests/Style.xaml'/>
+    </ContentControl.Resources>
+</ContentControl>")
+        };
+        
+        var objects = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+        var style = Assert.IsType<Style>(objects[0]);
+        var contentControl = Assert.IsType<ContentControl>(objects[1]);
+
+        Assert.IsType<Style>(contentControl.Resources["Include"]);
+    }
+    
+    [Fact]
+    public void Relative_StyleInclude_Is_Resolved_With_Two_Files()
+    {
+        var documents = new[]
+        {
+            new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
+<Style xmlns='https://github.com/avaloniaui'
+       xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Style.Resources>
+        <Color x:Key='Red'>Red</Color>
+    </Style.Resources>
+</Style>"),
+            new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Folder/Root.xaml"), @"
+<ContentControl xmlns='https://github.com/avaloniaui'
+                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <ContentControl.Resources>
+        <StyleInclude x:Key='Include' Source='/../Style.xaml'/>
+    </ContentControl.Resources>
+</ContentControl>")
+        };
+        
+        var objects = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+        var style = Assert.IsType<Style>(objects[0]);
+        var contentControl = Assert.IsType<ContentControl>(objects[1]);
+
+        Assert.IsType<Style>(contentControl.Resources["Include"]);
+    }
+    
+    [Fact]
+    public void NonLatin_StyleInclude_Is_Resolved_With_Two_Files()
+    {
+        var documents = new[]
+        {
+            new RuntimeXamlLoaderDocument(new Uri("avares://アセンブリ/スタイル.xaml"), @"
+<Style xmlns='https://github.com/avaloniaui'
+       xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Style.Resources>
+        <Color x:Key='Red'>Red</Color>
+    </Style.Resources>
+</Style>"),
+            new RuntimeXamlLoaderDocument(@"
+<ContentControl xmlns='https://github.com/avaloniaui'
+                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <ContentControl.Resources>
+        <StyleInclude x:Key='Include' Source='avares://アセンブリ/スタイル.xaml'/>
+    </ContentControl.Resources>
+</ContentControl>")
+        };
+        
+        var objects = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+        var style = Assert.IsType<Style>(objects[0]);
+        var contentControl = Assert.IsType<ContentControl>(objects[1]);
+
+        Assert.IsType<Style>(contentControl.Resources["Include"]);
+    }
+    
+    [Fact]
+    public void Missing_ResourceKey_In_StyleInclude_Does_Not_Cause_StackOverflow()
+    {
+        var documents = new[]
+        {
+            new RuntimeXamlLoaderDocument(new Uri("avares://Tests/Style.xaml"), @"
+<Style xmlns='https://github.com/avaloniaui'
+       xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <Style.Resources>
+        <StaticResource x:Key='brush' ResourceKey='missing' />
+    </Style.Resources>
+</Style>"),
+            new RuntimeXamlLoaderDocument(@"
+<ContentControl xmlns='https://github.com/avaloniaui'
+             xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
+    <ContentControl.Styles>
+        <StyleInclude Source='avares://Tests/Style.xaml'/>
+    </ContentControl.Styles>
+</ContentControl>")
+        };
+
+
+        try
+        {
+            _ = AvaloniaRuntimeXamlLoader.LoadGroup(documents);
+        }
+        catch (KeyNotFoundException)
+        {
+
+        }
+    }
+    
+    [Fact]
+    public void StyleInclude_Should_Be_Replaced_With_Direct_Call()
+    {
+        var control = (ContentControl)AvaloniaRuntimeXamlLoader.Load(@"
+<ContentControl xmlns='https://github.com/avaloniaui'
+                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
+                xmlns:themes='clr-namespace:Avalonia.Themes.Simple;assembly=Avalonia.Themes.Simple'>
+    <ContentControl.Styles>
+        <themes:SimpleTheme />
+        <StyleInclude Source='avares://Avalonia.Themes.Simple/SimpleTheme.xaml'/>
+    </ContentControl.Styles>
+</ContentControl>");
+        Assert.IsType<SimpleTheme>(control.Styles[0]);
+        Assert.IsType<SimpleTheme>(control.Styles[1]);
+    }
+}
diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleTests.cs b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleTests.cs
index 339609cb4f..70a5295008 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleTests.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Xaml/StyleTests.cs
@@ -109,45 +109,6 @@ namespace Avalonia.Markup.Xaml.UnitTests.Xaml
             }
         }
 
-        [Fact]
-        public void StyleInclude_Is_Built()
-        {
-            using (UnitTestApplication.Start(TestServices.StyledWindow
-                       .With(theme: () => new Styles())))
-            {
-                var xaml = @"
-<ContentControl xmlns='https://github.com/avaloniaui'>
-    <ContentControl.Styles>
-        <StyleInclude Source='avares://Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml'/>
-    </ContentControl.Styles>
-</ContentControl>";
-
-                var window = AvaloniaRuntimeXamlLoader.Parse<ContentControl>(xaml);
-                
-                Assert.IsType<Style>(window.Styles[0]);
-            }
-        }
-        
-        [Fact]
-        public void StyleInclude_Is_Built_Resources()
-        {
-            using (UnitTestApplication.Start(TestServices.StyledWindow
-                       .With(theme: () => new Styles())))
-            {
-                var xaml = @"
-<ContentControl xmlns='https://github.com/avaloniaui'
-                xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
-    <ContentControl.Resources>
-        <StyleInclude x:Key='Include' Source='avares://Avalonia.Markup.Xaml.UnitTests/Xaml/Style1.xaml'/>
-    </ContentControl.Resources>
-</ContentControl>";
-
-                var window = AvaloniaRuntimeXamlLoader.Parse<ContentControl>(xaml);
-
-                Assert.IsType<Style>(window.Resources["Include"]);
-            }
-        }
-        
         [Fact]
         public void Setter_Can_Contain_Template()
         {