diff --git a/bin/fuzz.py b/bin/fuzz.py
index f13138d4..62383714 100644
--- a/bin/fuzz.py
+++ b/bin/fuzz.py
@@ -186,25 +186,16 @@ def run(self):
         self.tasks = 0
         self.queue = parallel.Parallel(lambda task: task.run(bar), pin=True)
 
-        if self.queue.num_threads:
-            # pool of ids used for generators
-            self.tmp_ids = 2 * max(1, self.queue.num_threads) + 1
-            self.free_tmp_id = {*range(self.tmp_ids)}
-            self.tmp_id_count = [0] * self.tmp_ids
+        # pool of ids used for generators
+        self.tmp_ids = 2 * max(1, self.queue.num_threads) + 1
+        self.free_tmp_id = {*range(self.tmp_ids)}
+        self.tmp_id_count = [0] * self.tmp_ids
 
-            # add first generator task
-            self.finish_task()
-
-            # wait for the queue to run empty (after config.args.time)
-            self.queue.join()
-        else:
-            self.tmp_ids = -1
-            while time.monotonic() - self.start_time <= config.args.time:
-                testcase_rule = self.testcase_rules[self.iteration % len(self.testcase_rules)]
-                self.iteration += 1
-                self.queue.put(GeneratorTask(self, testcase_rule, self.iteration, None))
-                self.queue.join()
+        # add first generator task
+        self.finish_task()
 
+        # wait for the queue to run empty (after config.args.time)
+        self.queue.join()
         # At this point, no new tasks may be started anymore.
         self.queue.done()
         bar.done()