@@ -23,6 +23,12 @@ class DummyTextRunner(BaseRunner):
                     _('Missing required parameter - Time to First Token (in seconds) (key=ttft,type=int)')
                 )
             )
+        if not ({'tbt'} & parameters.keys()):
+            errors.append(
+                ValidationError(
+                    _('Missing required parameter - Time Between Tokens (in seconds) (key=tbt,type=int)')
+                )
+            )
         if not ({'ttpr'} & parameters.keys()):
             errors.append(
                 ValidationError(
@@ -39,6 +45,7 @@ class DummyTextRunner(BaseRunner):
         message = parameters['message']
         rates = parameters['ttpr']
         delay = parameters['ttft']
+        delay_between = parameters['tbt']
 
         time.sleep(delay)
 
@@ -46,6 +53,7 @@ class DummyTextRunner(BaseRunner):
             rate = rates[random.randint(0, len(rates) - 1)]
             chunk, message = message[:rate], message[rate:]
             yield chunk
+            time.sleep(delay_between)
 
 
 class DummyImageRunner(BaseRunner):