diff --git a/tests/worker/jobs/step_run_mock_job.py b/tests/worker/jobs/step_run_mock_job.py
index 7089c370..c95b631b 100644
--- a/tests/worker/jobs/step_run_mock_job.py
+++ b/tests/worker/jobs/step_run_mock_job.py
@@ -13,20 +13,21 @@ def __init__(self, run_id, realtime, timescale, external_clock, start_datetime,
         super().__init__()
         self.checkout_run(run_id)
         StepRunBase.__init__(self, run_id, realtime, timescale, external_clock, start_datetime, end_datetime, skip_site_init=True, skip_stop_db_writes=True)
-        self.first_step_warmup = True
-        self.simulation_step_duration = 1
-        self.run.sim_time = self.start_datetime
+        self.options.warmup_is_first_step = True
+        self.options.timestep_duration = timedelta(minutes=1)
+        self.run.sim_time = self.options.start_datetime
 
     def step(self):
         sleep(self.simulation_step_duration)
         self.set_run_time(self.run.sim_time + self.time_per_step())
 
-    def time_per_step(self) -> timedelta:
-        return timedelta(seconds=60)
-
     def get_sim_time(self) -> datetime.datetime:
         return self.run.sim_time
 
     @message
     def set_simulation_step_duration(self, simulation_step_duration):
-        self.simulation_step_duration = simulation_step_duration
+        self.options.timestep_duration = timedelta(minutes=simulation_step_duration)
+
+    @message
+    def advance(self):
+        self.run.sim_time = self.run.sim_time + 1