diff --git a/test/miaou-bash.test.bash b/test/miaou-bash.test.bash
index 108da52..3425c53 100755
--- a/test/miaou-bash.test.bash
+++ b/test/miaou-bash.test.bash
@@ -28,7 +28,6 @@ function assert_grep {
   ((test_count++))
   local script="$1" content="$2" extra_args=()
   [[ $# -gt 3 ]] && shift 3 && extra_args=("$@")
-  #TODO: quote extra_args
   cmd="./test/stub/scenario.bash $script"
   if $cmd "${extra_args[@]}" >_stdout 2>/dev/null 3>/dev/null; then
     if grep -q "$content" _stdout; then
@@ -37,7 +36,9 @@ function assert_grep {
     fi
   fi
   echo -n F
-  failures+=("$cmd")
+  #TODO: quote extra_args
+  for i in "${extra_args[@]}"; do safe_args+=$(printf '%q ' "$i"); done
+  failures+=("$cmd $safe_args")
   return 1
 }
 function fail_type {