diff --git a/tools/test/bin/stw b/tools/test/bin/stw
index 8231ee7..677d29c 100755
--- a/tools/test/bin/stw
+++ b/tools/test/bin/stw
@@ -33,8 +33,13 @@
 
     # Iterate over all listed scenarios
     for scenario in "${@:-smoke}"; do
-        printf "Running scenario %s...\n" $scenario
-        stc $scenario
+        if [[ $scenario =~ ^[0-9]*$ ]]; then
+            printf "Waiting %d seconds...\n" $scenario
+            sleep $scenario
+        else
+            printf "Running scenario %s...\n" $scenario
+            stc $scenario
+        fi
     done
     status=$?