diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
index 09c268c14..f70e4e330 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs
@@ -26,6 +26,7 @@ namespace SixLabors.ImageSharp.Tests
             0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A,
             
             // IHDR
+            0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52,
             0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x08, 0x02, 0x00, 0x00, 0x00, 
             // IHDR CRC
             0x90, 0x77, 0x53, 0xDE,