# duplicate timestamps in the output.
# If there are, we have to sort the text output to make sure it is
# always the same.
- head -1 "${text_output1}" | "${BT_TESTS_GREP_BIN}" "^\[" >/dev/null
+ head -1 "${text_output1}" | bt_grep "^\[" >/dev/null
if test $? = 0; then
# shellcheck disable=SC2016
uniq_ts_cnt="$("${BT_TESTS_AWK_BIN}" '{ print $1 }' < "${text_output1}" | sort | uniq | wc -l)"