diff --git a/src/SharpCompress/IO/MarkingBinaryReader.cs b/src/SharpCompress/IO/MarkingBinaryReader.cs
index be26df86..49d9fe5a 100644
--- a/src/SharpCompress/IO/MarkingBinaryReader.cs
+++ b/src/SharpCompress/IO/MarkingBinaryReader.cs
@@ -1,15 +1,14 @@
 using System;
 using System.Buffers.Binary;
 using System.IO;
+using System.Text;
 using SharpCompress.Common;
 
 namespace SharpCompress.IO;
 
-internal class MarkingBinaryReader : BinaryReader
+internal class MarkingBinaryReader(Stream stream)
+    : BinaryReader(stream, Encoding.UTF8, leaveOpen: true) //always leave the stream open
 {
-    public MarkingBinaryReader(Stream stream)
-        : base(stream) { }
-
     public virtual long CurrentReadByteCount { get; protected set; }
 
     public virtual void Mark() => CurrentReadByteCount = 0;
diff --git a/tests/SharpCompress.Test/Tar/TarArchiveAsyncTests.cs b/tests/SharpCompress.Test/Tar/TarArchiveAsyncTests.cs
index 78b851f7..2a085408 100644
--- a/tests/SharpCompress.Test/Tar/TarArchiveAsyncTests.cs
+++ b/tests/SharpCompress.Test/Tar/TarArchiveAsyncTests.cs
@@ -43,11 +43,9 @@ public class TarArchiveAsyncTests : ArchiveTests
             )
             using (Stream inputStream = new MemoryStream())
             {
-                using (var sw = new StreamWriter(inputStream))
-                {
-                    await sw.WriteAsync("dummy filecontent");
-                    await sw.FlushAsync();
-                }
+                var sw = new StreamWriter(inputStream);
+                await sw.WriteAsync("dummy filecontent");
+                await sw.FlushAsync();
 
                 inputStream.Position = 0;
                 await writer.WriteAsync(filename, inputStream, null);
@@ -104,11 +102,9 @@ public class TarArchiveAsyncTests : ArchiveTests
         )
         using (Stream inputStream = new MemoryStream())
         {
-            using (var sw = new StreamWriter(inputStream))
-            {
-                await sw.WriteAsync("dummy filecontent");
-                await sw.FlushAsync();
-            }
+            var sw = new StreamWriter(inputStream);
+            await sw.WriteAsync("dummy filecontent");
+            await sw.FlushAsync();
 
             inputStream.Position = 0;
             await writer.WriteAsync(longFilename, inputStream, null);
diff --git a/tests/SharpCompress.Test/Tar/TarArchiveTests.cs b/tests/SharpCompress.Test/Tar/TarArchiveTests.cs
index ab399231..008bb145 100644
--- a/tests/SharpCompress.Test/Tar/TarArchiveTests.cs
+++ b/tests/SharpCompress.Test/Tar/TarArchiveTests.cs
@@ -54,11 +54,9 @@ public class TarArchiveTests : ArchiveTests
         )
         using (Stream inputStream = new MemoryStream())
         {
-            using (var sw = new StreamWriter(inputStream))
-            {
-                sw.Write("dummy filecontent");
-                sw.Flush();
-            }
+            var sw = new StreamWriter(inputStream);
+            sw.Write("dummy filecontent");
+            sw.Flush();
 
             inputStream.Position = 0;
             writer.Write(filename, inputStream, null);
@@ -122,11 +120,9 @@ public class TarArchiveTests : ArchiveTests
         )
         using (Stream inputStream = new MemoryStream())
         {
-            using (var sw = new StreamWriter(inputStream))
-            {
-                sw.Write("dummy filecontent");
-                sw.Flush();
-            }
+            var sw = new StreamWriter(inputStream);
+            sw.Write("dummy filecontent");
+            sw.Flush();
 
             inputStream.Position = 0;
             writer.Write(longFilename, inputStream, null);