diff --git a/test.sh b/test.sh
index 013a041..d130f32 100755
--- a/test.sh
+++ b/test.sh
@@ -121,7 +121,7 @@ img2pdf()
 {
 	# we use --without-pdfrw to better "grep" the result and because we
 	# cannot write palette based images otherwise
-	$img2pdfprog --without-pdfrw --producer="" --nodate "$1" > "$2" 2>/dev/null
+	python3 $img2pdfprog -v --without-pdfrw --producer="" --nodate "$1" > "$2"
 }
 
 tests=51 # number of tests