diff --git a/assets/bigger_staggered.png b/assets/trivial-bigger-staggered.png
similarity index 100%
rename from assets/bigger_staggered.png
rename to assets/trivial-bigger-staggered.png
diff --git a/assets/bigger.png b/assets/trivial-bigger.png
similarity index 100%
rename from assets/bigger.png
rename to assets/trivial-bigger.png
diff --git a/io/reader/image_test.go b/io/reader/image_test.go
index 9dbc24a..a3ae3f4 100644
--- a/io/reader/image_test.go
+++ b/io/reader/image_test.go
@@ -34,7 +34,7 @@ func TestImageReader(t *testing.T) {
 			7, 5,
 			40, 40,
 			white, black,
-			"../../assets/bigger.png",
+			"../../assets/trivial-bigger.png",
 			[][]byte{
 				{0b_0001000_0},
 				{0b_0001000_0},
@@ -49,7 +49,7 @@ func TestImageReader(t *testing.T) {
 			40, 40,
 
 			white, black,
-			"../../assets/bigger_staggered.png",
+			"../../assets/trivial-bigger-staggered.png",
 			[][]byte{
 				{0b_0001000_0},
 				{0b_0001000_0},