diff --git a/test/miaou-bash.test.bash b/test/miaou-bash.test.bash
index 095dee6..23ac96b 100755
--- a/test/miaou-bash.test.bash
+++ b/test/miaou-bash.test.bash
@@ -10,14 +10,14 @@ readonly TMP_DIRECTORY TMP_OUT TMP_ERR TMP_MIAOU
 
 # functions
 
-function assert_stderr {
+function assert_tty {
   ((test_count++))
-  if [[ -w /dev/stderr ]]; then
+  if [[ -w /dev/tty ]]; then
     echo -n .
     return
   fi
   echo -n F
-  failures+=("test -w /dev/stderr")
+  failures+=("test -w /dev/tty")
   return 1
 }
 
@@ -148,8 +148,7 @@ mkdir -p "$TMP_DIRECTORY"
 TIMEFORMAT=$'\nelapsed: %Rs'
 
 time {
-  assert_stderr
-
+  assert_tty
   assert success
   assert exit_0
   assert return_conditional