diff --git a/src/core-taggeds-failure/Failure.Tests/AssertHelper/AssertHelper.cs b/src/core-taggeds-failure/Failure.Tests/AssertHelper/AssertHelper.cs
index 6a32ad3f..3577af48 100644
--- a/src/core-taggeds-failure/Failure.Tests/AssertHelper/AssertHelper.cs
+++ b/src/core-taggeds-failure/Failure.Tests/AssertHelper/AssertHelper.cs
@@ -1,5 +1,4 @@
 using System;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/GlobalUsings.cs b/src/core-taggeds-failure/Failure.Tests/GlobalUsings.cs
new file mode 100644
index 00000000..8c927eb7
--- /dev/null
+++ b/src/core-taggeds-failure/Failure.Tests/GlobalUsings.cs
@@ -0,0 +1 @@
+global using Xunit;
\ No newline at end of file
diff --git a/src/core-taggeds-failure/Failure.Tests/Source/Source.Equal.cs b/src/core-taggeds-failure/Failure.Tests/Source/Source.Equal.cs
index 5f4e898f..b57b9742 100644
--- a/src/core-taggeds-failure/Failure.Tests/Source/Source.Equal.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Source/Source.Equal.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Source/Source.ToException.cs b/src/core-taggeds-failure/Failure.Tests/Source/Source.ToException.cs
index 17141579..932be39f 100644
--- a/src/core-taggeds-failure/Failure.Tests/Source/Source.ToException.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Source/Source.ToException.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Reflection;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Source/Source.Unequal.cs b/src/core-taggeds-failure/Failure.Tests/Source/Source.Unequal.cs
index 057cc79d..6c876f31 100644
--- a/src/core-taggeds-failure/Failure.Tests/Source/Source.Unequal.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Source/Source.Unequal.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.Exception.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.Exception.cs
index 57ac2b7c..e2470343 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.Exception.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.Exception.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.cs
index b08df5b2..e33523f3 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Deconstruct.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Equality.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Equality.cs
index f9f3828a..25b926f9 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Equality.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Equality.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Inequality.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Inequality.cs
index b1527683..a022df8c 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Inequality.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Inequality.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Object.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Object.cs
index 82b16e66..0f698dbc 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Object.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Object.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Other.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Other.cs
index 4af1893a..95900d8f 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Other.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Other.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Static.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Static.cs
index 3c3ad653..f5dbf225 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Static.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Equals.Static.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Exception.To.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Exception.To.cs
index 13762db1..13ebd068 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Exception.To.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Exception.To.cs
@@ -1,7 +1,6 @@
 using System;
 using DeepEqual.Syntax;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Factory.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Factory.cs
index 301cf916..9335516d 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Factory.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.Factory.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.Map.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.Map.cs
index aef7b883..9fe0a9b8 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.Map.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.Map.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.With.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.With.cs
index f46087ad..f2415a8d 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.With.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.FailureCode.With.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 
 namespace PrimeFuncPack.Core.Tests;
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.GetHashCode.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.GetHashCode.cs
index 520a08bb..0b4660fc 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.GetHashCode.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.GetHashCode.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.UnitTest.TestData;
 
 namespace PrimeFuncPack.Core.Tests;
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.ToString.cs b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.ToString.cs
index c5ec7cee..f189db0c 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.ToString.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.Failure/Test.ToString.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Globalization;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.UnitTest.TestData;
 
 namespace PrimeFuncPack.Core.Tests;
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.Unit.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.Unit.cs
index 7c757558..fe07a481 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.Unit.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.Unit.cs
@@ -1,5 +1,4 @@
 using System;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.cs
index 7539695a..83dd818c 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureExtensions/Test.ToFailure.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Equals.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Equals.cs
index 50735040..42eb5d73 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Equals.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Equals.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 
 namespace PrimeFuncPack.Core.Tests;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Exception.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Exception.cs
index 6e172ad2..352b980e 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Exception.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Exception.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.Exception.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.Exception.cs
index a6141080..eabd3eab 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.Exception.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.Exception.cs
@@ -1,5 +1,4 @@
 using System;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.cs
index e3fc81d6..2da36f28 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.Unit.cs
@@ -1,5 +1,4 @@
 using System;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;
 
diff --git a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.cs b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.cs
index 1107e62b..54bf3230 100644
--- a/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.cs
+++ b/src/core-taggeds-failure/Failure.Tests/Test.FailureStatic/FailureStaticTest.Factory.cs
@@ -1,6 +1,5 @@
 using System;
 using PrimeFuncPack.UnitTest;
-using Xunit;
 using static PrimeFuncPack.Core.Tests.AssertHelper;
 using static PrimeFuncPack.UnitTest.TestData;