diff --git a/scripts/dunedaq_integtest_bundle.sh b/scripts/dunedaq_integtest_bundle.sh
index 3681736..8a109aa 100755
--- a/scripts/dunedaq_integtest_bundle.sh
+++ b/scripts/dunedaq_integtest_bundle.sh
@@ -69,6 +69,15 @@ invalid_numeric_option_value() {
     echo ""
 }
 
+# function to report one or more unexpected command-line arguments
+unexpected_command_arguments() {
+    declare -r script_name=$(basename "$0")
+    echo ""
+    echo -e "\U0001F534 ERROR: ${script_name} received unexpected command-line argument(s): $@"
+    echo ">>> Reminder: running '${script_name} --help' will list the supported options"
+    echo ""
+}
+
 # function to check for a specific string in a list
 string_in_list() {
     # get the search string from the first argument
@@ -331,6 +340,13 @@ while true; do
     esac
 done
 
+# if any command-line arguments remain after all of the 'getopt' processing, that is
+# a problem (since we don't expect any), so we let the user know.
+if [ $# -ne 0 ]; then
+    unexpected_command_arguments "$@"
+    exit 1
+fi
+
 # assemble the basic elements for the pytest command that we will use
 if [[ "${#PYTEST_OPTIONS[@]}" -gt 0 ]]; then
     PYTEST_BASE_COMMAND+=("${PYTEST_OPTIONS[@]}" "--")  # Add the requested options to the pytest command