diff --git a/tests/SharpCompress.Test/Zip/TestPseudoTextStream.cs b/tests/SharpCompress.Test/Zip/TestPseudoTextStream.cs
index e04351a7..20f1c9ce 100644
--- a/tests/SharpCompress.Test/Zip/TestPseudoTextStream.cs
+++ b/tests/SharpCompress.Test/Zip/TestPseudoTextStream.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Text;
 
 namespace SharpCompress.Test.Zip;