diff --git a/test/test_book/syntax_datadir/songs/images.csg b/test/test_book/syntax_datadir/songs/images.csg
index 1c220bd6..c5e5d399 100644
--- a/test/test_book/syntax_datadir/songs/images.csg
+++ b/test/test_book/syntax_datadir/songs/images.csg
@@ -1,3 +1,4 @@
+TODO Update with test file from test_song
 {title : Test of image sizes}
 
 {image: dices.png}
diff --git a/test/test_song/image.csg.source b/test/test_song/image.csg.source
index 8eeee847..dc5c9e32 100644
--- a/test/test_song/image.csg.source
+++ b/test/test_song/image.csg.source
@@ -17,6 +17,10 @@
 {image: "image with spaces.png" size=x50pt}
 {image: dices.png size=50ptx100pt}
 
+{image: dices.png size=2.5cmx}
+{image: "image with spaces.png" size=x2.5cm}
+{image: dices.png size=2.5cmx1.5cm}
+
 {image: dices.png size=3cmx10%}
 {image: "image with spaces.png" size=10%x3cm}
 {image: dices.png size=x}