diff --git a/rc_shared.sh b/rc_shared.sh
index 1aa150c..5a3ce8e 100644
--- a/rc_shared.sh
+++ b/rc_shared.sh
@@ -833,8 +833,10 @@ function pv-test {
 
 								finish=$SECONDS
 								minutes=$(( (finish - start) / 60 ))
+                                seconds=$(( (finish - start) % 60 ))
 								printf -v padded_mins "%03d" "$minutes"
-								mv -v "$newfile" "${filename_in}_${minutes}m${newfile}"
+                                printf -v padded_secs "%02d" "$seconds"
+								mv -v "$newfile" "${filename_in}_${padded_mins}m${padded_secs}s_${newfile}"
 
 								echo -e "\n* Finished run in $minutes minutes!\n"
 							#done