diff --git a/test/test_helper/common.bash b/test/test_helper/common.bash
index 6552945a..287c910b 100644
--- a/test/test_helper/common.bash
+++ b/test/test_helper/common.bash
@@ -181,7 +181,7 @@ function wait_for_changes_to_be_detected_in_container() {
     local CONTAINER_NAME="${1}"
     local TIMEOUT=${TEST_TIMEOUT_IN_SECONDS}
     # shellcheck disable=SC2016
-    repeat_in_container_until_success_or_timeout "${TIMEOUT}" "${CONTAINER_NAME}" bash -c 'source /usr/local/bin/helper_functions.sh; cmp --silent -- <(_monitored_files_checksums) "${CHKSUM_FILE}" >/dev/null'
+    repeat_in_container_until_success_or_timeout "${TIMEOUT}" "${CONTAINER_NAME}" bash -c 'source /usr/local/bin/helper-functions.sh; cmp --silent -- <(_monitored_files_checksums) "${CHKSUM_FILE}" >/dev/null'
 }
 
 function wait_for_empty_mail_queue_in_container() {