diff --git a/tests/toit-png-tools b/tests/toit-png-tools
index 8387669..e6ef736 160000
--- a/tests/toit-png-tools
+++ b/tests/toit-png-tools
@@ -1 +1 @@
-Subproject commit 8387669efa33a7108c746dcb19dd5ad0ac8f89d0
+Subproject commit e6ef73621cac0a69823efc7899f06debed7ebc0b