diff --git a/src/SshNetTests/TestBase.cs b/src/SshNetTests/TestBase.cs
index 022697d..2ab872b 100644
--- a/src/SshNetTests/TestBase.cs
+++ b/src/SshNetTests/TestBase.cs
@@ -40,11 +40,8 @@ protected static string CreateHash(Stream stream)
 
         protected static string CreateHash(byte[] buffer)
         {
-            using (var ms = new MemoryStream())
+            using (var ms = new MemoryStream(buffer))
             {
-                ms.Write(buffer, 0, buffer.Length);
-                ms.Position = 0;
-
                 return CreateHash(ms);
             }
         }