diff --git a/_unittest/test_28_Maxwell3D.py b/_unittest/test_28_Maxwell3D.py
index 7bfe443d3d7..219fdc43bde 100644
--- a/_unittest/test_28_Maxwell3D.py
+++ b/_unittest/test_28_Maxwell3D.py
@@ -1,6 +1,7 @@
 # Setup paths for module imports
 from _unittest.conftest import scratch_path, local_path
 import os
+import tempfile
 
 # Import required modules
 from pyaedt import Maxwell3d
@@ -99,6 +100,20 @@ def test_07_setup(self):
         assert Setup.enable()
         assert self.aedtapp.setup_ctrlprog(Setup.name)
 
+    def test_08_setup_ctrlprog_with_file(self):
+        transient_setup = self.aedtapp.create_setup()
+        transient_setup.props["MaximumPasses"] = 12
+        transient_setup.props["MinimumPasses"] = 2
+        transient_setup.props["MinimumConvergedPasses"] = 1
+        transient_setup.props["PercentRefinement"] = 30
+        transient_setup.props["Frequency"] = "200Hz"
+        transient_setup.update()
+        transient_setup.enable_expression_cache(["CoreLoss"], "Fields", "Phase='0deg' ", True)
+
+        # Test the creation of the control program file
+        with tempfile.TemporaryFile("w+") as fp:
+            assert self.aedtapp.setup_ctrlprog(transient_setup.name, file_str=fp.name)
+
     def test_22_create_length_mesh(self):
         assert self.aedtapp.mesh.assign_length_mesh(["Plate"])
 
diff --git a/_unittest/test_29_Mechanical.py b/_unittest/test_29_Mechanical.py
index 2918f09d112..56cac01b90b 100644
--- a/_unittest/test_29_Mechanical.py
+++ b/_unittest/test_29_Mechanical.py
@@ -90,6 +90,10 @@ def test_07_assign_mechanical_boundaries(self):
         assert mech.assign_fixed_support(mech.modeler["MyCylinder"].faces[0].id)
         assert mech.assign_frictionless_support(mech.modeler["MyCylinder"].faces[1].id)
 
+        mech = Mechanical(solution_type=self.aedtapp.SOLUTIONS.Mechanical.Thermal)
+        assert not mech.assign_fixed_support(mech.modeler["MyCylinder"].faces[0].id)
+        assert not mech.assign_frictionless_support(mech.modeler["MyCylinder"].faces[0].id)
+
     def test_08_mesh_settings(self):
         assert self.aedtapp.mesh.initial_mesh_settings
         assert self.aedtapp.mesh.initial_mesh_settings.props
diff --git a/_unittest/test_31_Q3D.py b/_unittest/test_31_Q3D.py
index 2e4ec2d6b07..64a35ee37df 100644
--- a/_unittest/test_31_Q3D.py
+++ b/_unittest/test_31_Q3D.py
@@ -53,6 +53,9 @@ def test_06a_create_setup(self):
         assert sweep
         assert sweep.props["RangeStart"] == "1GHz"
 
+        # Create a discrete sweep with the same name of an existing sweep is not possible.
+        assert not self.aedtapp.create_discrete_sweep(mysetup.name, sweepname="mysweep", freqstart=1, units="GHz")
+
     def test_06b_create_setup(self):
         mysetup = self.aedtapp.create_setup()
         mysetup.props["SaveFields"] = True
diff --git a/_unittest/test_41_3dlayout_modeler.py b/_unittest/test_41_3dlayout_modeler.py
index 15d52ef881f..84061e60db0 100644
--- a/_unittest/test_41_3dlayout_modeler.py
+++ b/_unittest/test_41_3dlayout_modeler.py
@@ -292,6 +292,23 @@ def test_18b_create_linear_step_sweep(self):
         )
         assert sweep4.props["Sweeps"]["Data"] == "LIN 1GHz 10GHz 0.12GHz"
 
+        # Create a linear step sweep with the incorrect sweep type.
+        try:
+            sweep_raising_error = self.aedtapp.create_linear_step_sweep(
+                setupname=setup_name,
+                unit="GHz",
+                freqstart=1,
+                freqstop=10,
+                step_size=0.12,
+                sweepname="RFBoardSweep4",
+                sweep_type="Incorrect",
+                save_fields=True,
+            )
+        except AttributeError as e:
+            exception_raised = True
+            assert e.args[0] == "Invalid in `sweep_type`. It has to be either 'Discrete', 'Interpolating', or 'Fast'"
+        assert exception_raised
+
     def test_18c_create_single_point_sweep(self):
         setup_name = "RFBoardSetup"
         sweep5 = self.aedtapp.create_single_point_sweep(