diff --git a/X10D.Tests/src/Hosting/ServiceCollectionTests.cs b/X10D.Tests/src/Hosting/ServiceCollectionTests.cs
index 3713763..a4c673c 100644
--- a/X10D.Tests/src/Hosting/ServiceCollectionTests.cs
+++ b/X10D.Tests/src/Hosting/ServiceCollectionTests.cs
@@ -1,7 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using Moq;
 using X10D.Hosting.DependencyInjection;
 
 namespace X10D.Tests.Hosting;
diff --git a/X10D.Tests/src/Linq/EnumerableTests.cs b/X10D.Tests/src/Linq/EnumerableTests.cs
index 40947a4..336b21d 100644
--- a/X10D.Tests/src/Linq/EnumerableTests.cs
+++ b/X10D.Tests/src/Linq/EnumerableTests.cs
@@ -1,5 +1,4 @@
-using System.Collections;
-using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
 using X10D.Linq;
 
 namespace X10D.Tests.Linq;