diff --git a/urchin b/urchin
index 5594bda..aa47773 100755
--- a/urchin
+++ b/urchin
@@ -181,7 +181,7 @@ urchin_go() {
     printf '%s\n' "$2 $(plural test "$2") failed."
     printf '\033[m'
   fi
-  test "$2" -eq '0'
+  test -z "$2" || test "$2" -eq '0'
 }
 
 urchin_molly_guard() {