diff --git a/tests/test_misc.sh b/tests/test_misc.sh
index d5536516..6f1dd405 100755
--- a/tests/test_misc.sh
+++ b/tests/test_misc.sh
@@ -32,6 +32,9 @@ test_get_process_name() {
 
 
 printf "%s\\n" "Test MISC functions."
+
 test_convert_time
 test_get_ppid
 test_get_process_name
+
+[[ -f /tmp/err ]] || exit 0 && { rm /tmp/err; exit 1; }
diff --git a/tests/test_util.sh b/tests/test_util.sh
index 1eecc998..32657f9a 100644
--- a/tests/test_util.sh
+++ b/tests/test_util.sh
@@ -7,4 +7,5 @@ assert_equals() {
     local status
     [[ "$1" == "$2" ]] && status="✔"
     printf "%s\\n" "  ${status:-✖} : ${FUNCNAME[1]}"
+    [[ "$1" == "$2" ]] || { :>/tmp/err; return 1; } && return 0
 }