diff --git a/src/Ryujinx.Tests/Graphics/AstcDecoderTests.cs b/src/Ryujinx.Tests/Graphics/AstcDecoderTests.cs
index b44b1cafb9..7d8868c67a 100644
--- a/src/Ryujinx.Tests/Graphics/AstcDecoderTests.cs
+++ b/src/Ryujinx.Tests/Graphics/AstcDecoderTests.cs
@@ -11,6 +11,24 @@ using System.Threading.Tasks;
 
 namespace Ryujinx.Tests.Graphics
 {
+    /**
+     * 
+     * NOTES
+     * 
+     * HOW I GENERATED INPUT DATA
+     * Step 1. Create ASTC-compressed image from sample data.
+     * *** NOTE This image isn't 2^x evenly sized, it's 768x512 - something that would break down into nice squares, for sure. 
+     *     `bin/astcenc-avx2 -cl sources/kodim01.png output/kodim01.l4x4.astc 4x4 -fast`
+     * 
+     * Step 2. Decompress the data we just created. 
+     *     `bin/astcenc-avx2 -dl output/kodim01.l4x4.astc output/kodim01.l4x4.astc.png`
+     * 
+     * WHAT WE DO IN THE TEST BELOW:
+     * 1. Read the sample iamge, ASTC-compressed reference, and decompressed reference that we generated above.
+     * 2. Run TryDecodeToRgba8P on our ASTC-compressed texture.
+     * 3. Assert that the data we decompressed in our method is the same data as the decompressed reference image. 
+     */
+
     public class AstcDecoderTests
     {
         private string _workingDir;
@@ -39,7 +57,7 @@ namespace Ryujinx.Tests.Graphics
             int levels = 1;
             int layers = 1;
 
-            _ = AstcDecoder.TryDecodeToRgba8P(original, blockWidth, blockHeight, texWidth, texHeight, depth, levels, layers, out outputBuffer);
+            _ = AstcDecoder.TryDecodeToRgba8P(encodedRef, blockWidth, blockHeight, texWidth, texHeight, depth, levels, layers, out outputBuffer);
             var outputPath = Path.Join(_testDataDir, "kodim01.l4x4.output.png");
 
             // Make sure we're clobbering the test output.