diff --git a/src/main.rs b/src/main.rs
index e2e13e5..73644e7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -473,7 +473,7 @@ mod test {
             QOI_OP_RGBA, 0x20, 0x20, 0x20, 0x20,
             (QOI_OP_INDEX | 1),
             (QOI_OP_DIFF | 0b0011_1111),
-            (QOI_OP_LUMA | 0b0011_111), 0b0011_1111,
+            (QOI_OP_LUMA | 0b0011_1111), 0b1111_1111,
             (QOI_OP_RUN | 2),
             QOI_OP_RGBA, 0xFF, 0xFF, 0xFF, 0xFF,
         ];
@@ -481,23 +481,22 @@ mod test {
         let expected = [
             PixelRGBA::new(0, 0, 0, 0xFF),          // init
             PixelRGBA::new(0x10, 0x10, 0x10, 0xFF), // RGB 
-            PixelRGBA::new(0x20, 0x20, 0x20, 0xFF), // RGBA
+            PixelRGBA::new(0x20, 0x20, 0x20, 0x20), // RGBA
             PixelRGBA::new(0, 0, 0, 0),             // INDEX -- this doubles as a small test for the backbuffer operation
             PixelRGBA::new(0x1, 0x1, 0x1, 0x0),     // DIFF
             PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // LUMA
             PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 1
             PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 2
             PixelRGBA::new(0x27, 0x20, 0x27, 0x0),   // RUN 3
-            // final OP_RGBA is just to flush out the OP_RUN prev_pixel value
+            PixelRGBA::new(0xFF, 0xFF, 0xFF, 0xFF)
         ];
 
         let mut decoder = Decoder::new(compressed.into_iter());
 
         let mut result = Vec::<PixelRGBA>::new();
         loop {
-            if let Some(_) = decoder.next() {
-                result.push(*decoder.peek_prev_pixel());
-            } else {
+            result.push(*decoder.peek_prev_pixel());
+            if let None = decoder.next() {
                 break;
             }
         }