diff --git a/tests/ImageSharp.Tests/Formats/Gif/GifMetadataTests.cs b/tests/ImageSharp.Tests/Formats/Gif/GifMetadataTests.cs
index e209586f5f..d3aa4b913a 100644
--- a/tests/ImageSharp.Tests/Formats/Gif/GifMetadataTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Gif/GifMetadataTests.cs
@@ -13,6 +13,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Gif
 {
+    [Collection("RunSerial")]
     [Trait("Format", "Gif")]
     public class GifMetadataTests
     {