diff --git a/moptipyapps/dynamic_control/objective.py b/moptipyapps/dynamic_control/objective.py
index a77bed05..ca703f8e 100644
--- a/moptipyapps/dynamic_control/objective.py
+++ b/moptipyapps/dynamic_control/objective.py
@@ -198,10 +198,13 @@ def evaluate(self, x: np.ndarray) -> float:
             np.copy(start.flatten())  # <--- This should make no sense...
             ode = run_ode(
                 start, equations, controller, x, controller_dim, steps, time)
-            results[i] = j_from_ode(ode, state_dim, state_dims_in_j, gamma)
+            results[i] = z = j_from_ode(ode, state_dim, state_dims_in_j, gamma)
+            if not (0.0 <= z <= 1e100):
+                return 1e200
             if collector is not None:
                 collector(diff_from_ode(ode, state_dim))
-        return self.sum_up_results(results)
+        z = self.sum_up_results(results)
+        return z if 0.0 <= z <= 1e100 else 1e200
 
     def sum_up_results(self, results: np.ndarray) -> float:
         """
diff --git a/tests/dynamic_control/test_experiment_raw.py b/tests/dynamic_control/test_experiment_raw.py
index 2783a610..dc67f86e 100644
--- a/tests/dynamic_control/test_experiment_raw.py
+++ b/tests/dynamic_control/test_experiment_raw.py
@@ -58,9 +58,10 @@ def test_experiment_raw(random: Generator = default_rng()) -> None:
 
     :param random: a randomizer
     """
-    n_runs: Final[int] = int(random.integers(1, 5))
+    n_runs: Final[int] = 1
     er: list[EndResult] = []
     insts: list[Callable[[], Instance]] = __make_instances()
+    insts = [insts[random.integers(len(insts))]]
 
     with TempDir.create() as use_dir:
         er.clear()
diff --git a/tests/dynamic_control/test_experiment_surrogate.py b/tests/dynamic_control/test_experiment_surrogate.py
index a7b362ad..b822e506 100644
--- a/tests/dynamic_control/test_experiment_surrogate.py
+++ b/tests/dynamic_control/test_experiment_surrogate.py
@@ -1,6 +1,6 @@
 """A test for the surrogate experiment of the dynamic control problem."""
 
-from typing import Callable, cast
+from typing import Callable, Final, cast
 
 from moptipy.api.execution import Execution
 from moptipy.api.experiment import run_experiment
@@ -66,6 +66,7 @@ def test_experiment_surrogate(random: Generator = default_rng()) -> None:
 
     :param random: a randomizer
     """
+    n_runs: Final[int] = 1
     er: list[EndResult] = []
     insts: list[Callable[[], SystemModel]] = list(__make_instances(random))
     insts = [insts[random.integers(len(insts))]]
@@ -75,8 +76,8 @@ def test_experiment_surrogate(random: Generator = default_rng()) -> None:
         run_experiment(base_dir=use_dir,
                        instances=insts,
                        setups=[__cmaes],
-                       n_runs=1,
+                       n_runs=n_runs,
                        perform_warmup=False,
                        perform_pre_warmup=False)
         EndResult.from_logs(use_dir, er.append)
-    assert len(er) == len(insts)
+    assert len(er) == (len(insts) * n_runs)
diff --git a/tests/dynamic_control/test_objective.py b/tests/dynamic_control/test_objective.py
index f26dccd9..eb512bf2 100644
--- a/tests/dynamic_control/test_objective.py
+++ b/tests/dynamic_control/test_objective.py
@@ -10,12 +10,6 @@
 from moptipyapps.dynamic_control.controllers.ann import anns
 from moptipyapps.dynamic_control.controllers.cubic import cubic
 from moptipyapps.dynamic_control.controllers.linear import linear
-from moptipyapps.dynamic_control.controllers.min_ann import min_anns
-from moptipyapps.dynamic_control.controllers.partially_linear import (
-    partially_linear,
-)
-from moptipyapps.dynamic_control.controllers.peaks import peaks
-from moptipyapps.dynamic_control.controllers.predefined import predefined
 from moptipyapps.dynamic_control.controllers.quadratic import quadratic
 from moptipyapps.dynamic_control.instance import Instance
 from moptipyapps.dynamic_control.objective import (
@@ -23,11 +17,8 @@
     FigureOfMeritLE,
 )
 from moptipyapps.dynamic_control.system import System
-from moptipyapps.dynamic_control.systems.lorenz import LORENZ_4, LORENZ_111
-from moptipyapps.dynamic_control.systems.stuart_landau import (
-    STUART_LANDAU_4,
-    STUART_LANDAU_111,
-)
+from moptipyapps.dynamic_control.systems.lorenz import LORENZ_4
+from moptipyapps.dynamic_control.systems.stuart_landau import STUART_LANDAU_4
 
 
 def __objective_test(fc: Callable[[Instance, bool], FigureOfMerit],
@@ -63,8 +54,7 @@ def __objective_tests(fc: Callable[[Instance, bool], FigureOfMerit],
     :param fc: the figure of merit
     :param random: the generator
     """
-    for orig_system in (STUART_LANDAU_111, LORENZ_111, STUART_LANDAU_4,
-                        LORENZ_4):
+    for orig_system in (STUART_LANDAU_4, LORENZ_4):
         system = System(orig_system.name,
                         orig_system.state_dims, orig_system.control_dims,
                         orig_system.state_dim_mod,
@@ -78,10 +68,6 @@ def __objective_tests(fc: Callable[[Instance, bool], FigureOfMerit],
 
         controllers = [linear(system), quadratic(system), cubic(system)]
         controllers.extend(anns(system))
-        controllers.extend(min_anns(system))
-        controllers.extend(partially_linear(system))
-        controllers.extend(predefined(system))
-        controllers.extend(peaks(system))
         for c in controllers:
             __objective_test(fc, Instance(system, c))