diff --git a/tests/Beutl.Core.UnitTests/CommandRecorderTests.cs b/tests/Beutl.Core.UnitTests/CommandRecorderTests.cs
index f1809719d..a06835f42 100644
--- a/tests/Beutl.Core.UnitTests/CommandRecorderTests.cs
+++ b/tests/Beutl.Core.UnitTests/CommandRecorderTests.cs
@@ -2,6 +2,8 @@
 
 using NUnit.Framework;
 
+using Beutl.Logging;
+
 namespace Beutl.Core.UnitTests;
 
 public class CommandRecorderTests
@@ -9,7 +11,7 @@ public class CommandRecorderTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
     }
 
     [Test]
diff --git a/tests/Beutl.Core.UnitTests/JsonSerializationTest.cs b/tests/Beutl.Core.UnitTests/JsonSerializationTest.cs
index efc5d6e39..7ed6e15fc 100644
--- a/tests/Beutl.Core.UnitTests/JsonSerializationTest.cs
+++ b/tests/Beutl.Core.UnitTests/JsonSerializationTest.cs
@@ -7,6 +7,7 @@
 using Beutl.Operators.Configure.Transform;
 using Beutl.Operators.Source;
 using Beutl.ProjectSystem;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -19,7 +20,7 @@ public class JsonSerializationTest
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
     }
 
     [Test]
diff --git a/tests/Beutl.Core.UnitTests/PropertyChangeTrackerTests.cs b/tests/Beutl.Core.UnitTests/PropertyChangeTrackerTests.cs
index cd958f547..b6e819d50 100644
--- a/tests/Beutl.Core.UnitTests/PropertyChangeTrackerTests.cs
+++ b/tests/Beutl.Core.UnitTests/PropertyChangeTrackerTests.cs
@@ -1,5 +1,6 @@
 
 using Beutl.Collections;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -12,7 +13,7 @@ public class PropertyChangeTrackerTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
     }
 
     [Test]
diff --git a/tests/Beutl.Engine.UnitTests/DeferradCanvasTests.cs b/tests/Beutl.Engine.UnitTests/DeferradCanvasTests.cs
index 9bb0a23de..cd0043730 100644
--- a/tests/Beutl.Engine.UnitTests/DeferradCanvasTests.cs
+++ b/tests/Beutl.Engine.UnitTests/DeferradCanvasTests.cs
@@ -2,6 +2,7 @@
 using Beutl.Graphics.Rendering;
 using Beutl.Media;
 using Beutl.Media.Pixel;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -14,7 +15,7 @@ public class DeferradCanvasTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
     }
 
     private static void Draw(ICanvas canvas)
diff --git a/tests/Beutl.Engine.UnitTests/ShapeTests.cs b/tests/Beutl.Engine.UnitTests/ShapeTests.cs
index 0da278cf3..bfed28e7a 100644
--- a/tests/Beutl.Engine.UnitTests/ShapeTests.cs
+++ b/tests/Beutl.Engine.UnitTests/ShapeTests.cs
@@ -2,6 +2,7 @@
 using Beutl.Graphics.Shapes;
 using Beutl.Media;
 using Beutl.Media.Pixel;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -15,7 +16,7 @@ public class ShapeTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
     }
 
     [Test]
diff --git a/tests/Beutl.Engine.UnitTests/StyleTests.cs b/tests/Beutl.Engine.UnitTests/StyleTests.cs
index 652c460d9..9c07e10f9 100644
--- a/tests/Beutl.Engine.UnitTests/StyleTests.cs
+++ b/tests/Beutl.Engine.UnitTests/StyleTests.cs
@@ -2,6 +2,7 @@
 using Beutl.Graphics.Shapes;
 using Beutl.Media;
 using Beutl.Styling;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -22,7 +23,7 @@ public class StyleTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
 
         _obj = new StyleableObject();
         Style style1 = new Style<StyleableObject>
diff --git a/tests/Beutl.Engine.UnitTests/TextBlockTests.cs b/tests/Beutl.Engine.UnitTests/TextBlockTests.cs
index e96a0bbf5..b11255907 100644
--- a/tests/Beutl.Engine.UnitTests/TextBlockTests.cs
+++ b/tests/Beutl.Engine.UnitTests/TextBlockTests.cs
@@ -2,6 +2,7 @@
 using Beutl.Graphics.Shapes;
 using Beutl.Media;
 using Beutl.Media.Pixel;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -29,7 +30,7 @@ public class TextBlockTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
         _ = TypefaceProvider.Typeface();
     }
 
diff --git a/tests/Beutl.Engine.UnitTests/TextElementsTests.cs b/tests/Beutl.Engine.UnitTests/TextElementsTests.cs
index c2fb973fc..8a1676980 100644
--- a/tests/Beutl.Engine.UnitTests/TextElementsTests.cs
+++ b/tests/Beutl.Engine.UnitTests/TextElementsTests.cs
@@ -5,6 +5,7 @@
 using Beutl.Graphics.Shapes;
 using Beutl.Media;
 using Beutl.Media.TextFormatting;
+using Beutl.Logging;
 
 using Microsoft.Extensions.Logging;
 
@@ -17,7 +18,7 @@ public class TextElementsTests
     [SetUp]
     public void Setup()
     {
-        BeutlApplication.Current.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
+        Log.LoggerFactory = LoggerFactory.Create(b => b.AddSimpleConsole());
         _ = TypefaceProvider.Typeface();
     }