diff --git a/selfdrive/car/tests/test_car_interfaces.py b/selfdrive/car/tests/test_car_interfaces.py
index f320e0be2..c6c908efd 100755
--- a/selfdrive/car/tests/test_car_interfaces.py
+++ b/selfdrive/car/tests/test_car_interfaces.py
@@ -30,6 +30,17 @@ class TestCarInterfaces(unittest.TestCase):
         assert car_params
         assert car_interface
 
+        self.assertGreater(car_params.mass, 1)
+        self.assertGreater(car_params.steerRateCost, 1e-3)
+
+        tuning = car_params.lateralTuning.which()
+        if tuning == 'pid':
+          self.assertTrue(len(car_params.lateralTuning.pid.kpV))
+        elif tuning == 'lqr':
+          self.assertTrue(len(car_params.lateralTuning.lqr.a))
+        elif tuning == 'indi':
+          self.assertGreater(car_params.lateralTuning.indi.outerLoopGain, 1e-3)
+
         # Run car interface
         CC = car.CarControl.new_message()
         for _ in range(10):