diff --git a/content/canvas/src/nsCanvasRenderingContext2D.cpp b/content/canvas/src/nsCanvasRenderingContext2D.cpp
index 0eb467676f40..517c01eb0623 100644
--- a/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -3518,10 +3518,8 @@ nsCanvasRenderingContext2D::SetGlobalCompositeOperation(const nsAString& op)
     if (op.EqualsLiteral(cvsop))   \
         thebes_op = gfxContext::OPERATOR_##thebesop;
 
-    // XXX "darker" isn't really correct
     CANVAS_OP_TO_THEBES_OP("clear", CLEAR)
     else CANVAS_OP_TO_THEBES_OP("copy", SOURCE)
-    else CANVAS_OP_TO_THEBES_OP("darker", SATURATE)  // XXX
     else CANVAS_OP_TO_THEBES_OP("destination-atop", DEST_ATOP)
     else CANVAS_OP_TO_THEBES_OP("destination-in", DEST_IN)
     else CANVAS_OP_TO_THEBES_OP("destination-out", DEST_OUT)
diff --git a/content/canvas/test/test_canvas.html b/content/canvas/test/test_canvas.html
index c385ce6d31da..f1b9233ffd84 100644
--- a/content/canvas/test/test_canvas.html
+++ b/content/canvas/test/test_canvas.html
@@ -1501,7 +1501,7 @@ var ctx = canvas.getContext('2d');
 
 ctx.globalCompositeOperation = 'xor';
 ctx.globalCompositeOperation = 'darker';
-todo(ctx.globalCompositeOperation == 'xor', "ctx.globalCompositeOperation == 'xor'");
+ok(ctx.globalCompositeOperation == 'xor', "ctx.globalCompositeOperation == 'xor'");
 
 
 }