--- a/test-data/refresh_test_results.sh	Wed Jun 18 14:33:12 2014 +0200
+++ b/test-data/refresh_test_results.sh	Thu Jun 19 17:00:29 2014 +0200
@@ -2,7 +2,9 @@
 
 # run this from the directory it exists in to update the test outputs
 
+set -eu
+
 for i in 1 2 3 4
 do
-	../blast2html.py -i "blast xml example$i.xml" -o "blast xml example$i.html"
+	"$@" ../blast2html.py -i "blast xml example$i.xml" -o "blast xml example$i.html"
 done