diff --git a/tests/toit-png-tools b/tests/toit-png-tools
index ee472ac..e6ef736 160000
--- a/tests/toit-png-tools
+++ b/tests/toit-png-tools
@@ -1 +1 @@
-Subproject commit ee472ac9d4333a138206f9d3a817d3c5432d6f87
+Subproject commit e6ef73621cac0a69823efc7899f06debed7ebc0b