diff --git a/script/test/otf_test.py b/script/test/otf_test.py
index 2399011..85a5277 100644
--- a/script/test/otf_test.py
+++ b/script/test/otf_test.py
@@ -8,7 +8,7 @@
 nr_loops=1000
 loop_count = 0
 while loop_count < nr_loops:
-    otf(start=480, end=510, time=5, delay=, mode='LINEAR', alpha = 0.0, offset=0.0, name='pshell-test')
+    otf(start=480, end=510, time=5, delay=60, mode='LINEAR', alpha = 0.0, offset=0.0, name='pshell-test')
 #    otf(start=520, end=570, time=5, delay=5.0, mode='LINEAR', alpha = 0.0, offset=0.0, name='pshell-test')
     loop_count = loop_count + 1