diff --git a/X10D.Tests/src/Core/SingleTests.cs b/X10D.Tests/src/Core/SingleTests.cs
index 87db537..386dc15 100644
--- a/X10D.Tests/src/Core/SingleTests.cs
+++ b/X10D.Tests/src/Core/SingleTests.cs
@@ -1,5 +1,7 @@
 using System.Numerics;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using X10D.Math;
+using X10D.Numerics;
 
 namespace X10D.Tests.Core;