diff --git a/src/main.rs b/src/main.rs
index 9038217..6474ec7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -368,7 +368,7 @@ mod test {
     fn decoder_unpack_run() {
         let compressed = [
             (QOI_OP_RUN | 0b0000_0000), //  1 -- bias of -1, so all zeros is a run of 1 pixel
-            (QOI_OP_RUN | 0b0000_1111), // 13
+            (QOI_OP_RUN | 0b0000_1100), // 13 // 0b1111?  no it isn't. what?
         ];
 
         let init_pixel = PixelRGBA::new(50, 100, 150, 200);