diff --git a/tests/test_simulation_execution_options.py b/tests/test_simulation_execution_options.py
index 8a25de9b..7e2a9f3c 100644
--- a/tests/test_simulation_execution_options.py
+++ b/tests/test_simulation_execution_options.py
@@ -162,7 +162,7 @@ def test_as_list_custom_record(self):
         options = self.default_options
         self.mock_sensor.record = ["p_max", "u_min", "I_avg"]
         options.device_num = 2
-        options.num_threads = 8
+        options.num_threads = os.cpu_count()
         options.verbose_level = 1
 
         options_list = options.as_list(self.mock_sensor)
@@ -192,7 +192,7 @@ def test_as_list_no_record(self):
         options = self.default_options
         self.mock_sensor.record = None
         options.device_num = 1
-        options.num_threads = 4
+        options.num_threads = os.cpu_count()
         options.verbose_level = 0
 
         options_list = options.as_list(self.mock_sensor)
@@ -210,7 +210,7 @@ def test_list_compared_to_string(self):
         """Test the list representation compared to the string representation."""
         options = self.default_options
         options.device_num = 1
-        options.num_threads = 4
+        options.num_threads = os.cpu_count()
         options.verbose_level = 1
 
         options_list = options.as_list(self.mock_sensor)