diff --git a/Library/DiscUtils.Core/Compression/BigEndianBitStream.cs b/Library/DiscUtils.Core/Compression/BigEndianBitStream.cs
index de8066d5..45ba1f9c 100644
--- a/Library/DiscUtils.Core/Compression/BigEndianBitStream.cs
+++ b/Library/DiscUtils.Core/Compression/BigEndianBitStream.cs
@@ -82,7 +82,7 @@ private void EnsureBufferFilled()
         {
             _readBuffer[0] = 0;
             _readBuffer[1] = 0;
-            _byteStream.ReadExactly(_readBuffer, 0, 2);
+            _ = _byteStream.Read(_readBuffer, 0, 2);
 
             _buffer = _buffer << 16 | (uint)(_readBuffer[0] << 8) | _readBuffer[1];
             _bufferAvailable += 16;
diff --git a/Tests/LibraryTests/Compression/ZlibStreamTest.cs b/Tests/LibraryTests/Compression/ZlibStreamTest.cs
index 3d874e98..71338c5f 100644
--- a/Tests/LibraryTests/Compression/ZlibStreamTest.cs
+++ b/Tests/LibraryTests/Compression/ZlibStreamTest.cs
@@ -24,6 +24,7 @@
 using System.IO.Compression;
 using System.Text;
 using DiscUtils.Compression;
+using DiscUtils.Streams;
 using Xunit;
 
 namespace LibraryTests.Compression;
diff --git a/Tests/LibraryTests/LibraryTests.csproj b/Tests/LibraryTests/LibraryTests.csproj
index 1f1cb04a..defd2fbe 100644
--- a/Tests/LibraryTests/LibraryTests.csproj
+++ b/Tests/LibraryTests/LibraryTests.csproj
@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFrameworks>net9.0</TargetFrameworks>
+    <TargetFrameworks>net46;net48;net8.0;net9.0</TargetFrameworks>
     <DebugType>portable</DebugType>
     <AssemblyName>LibraryTests</AssemblyName>
     <PackageId>LibraryTests</PackageId>