diff --git a/src/easyreflectometry/project.py b/src/easyreflectometry/project.py
index 4480b828..883edf8b 100644
--- a/src/easyreflectometry/project.py
+++ b/src/easyreflectometry/project.py
@@ -23,8 +23,8 @@
 from easyreflectometry.model import ModelCollection
 from easyreflectometry.model import PercentageFhwm
 from easyreflectometry.sample import Layer
-from easyreflectometry.sample import MaterialCollection
 from easyreflectometry.sample import Material
+from easyreflectometry.sample import MaterialCollection
 from easyreflectometry.sample import Multilayer
 from easyreflectometry.sample import Sample
 from easyreflectometry.sample.collections.base_collection import BaseCollection
@@ -284,18 +284,15 @@ def default_model(self):
 
         layers = [
             Layer(material=self._materials[0], thickness=0.0, roughness=0.0, name='Vacuum Layer'),
-            Layer(material=self._materials[1], thickness=100.0, roughness=3.0, name='Multi-layer'),
+            Layer(material=self._materials[1], thickness=100.0, roughness=3.0, name='D2O Layer'),
             Layer(material=self._materials[2], thickness=0.0, roughness=1.2, name='Si Layer'),
         ]
         assemblies = [
             Multilayer(layers[0], name='Superphase'),
-            Multilayer(layers[1], name='Multi-layer'),
+            Multilayer(layers[1], name='D2O'),
             Multilayer(layers[2], name='Subphase'),
         ]
         sample = Sample(*assemblies)
-        sample[0].layers[0].thickness.enabled = False
-        sample[0].layers[0].roughness.enabled = False
-        sample[-1].layers[-1].thickness.enabled = False
         model = Model(sample=sample)
         self.models = ModelCollection([model])
 
diff --git a/src/easyreflectometry/sample/collections/sample.py b/src/easyreflectometry/sample/collections/sample.py
index 626aff6d..12394474 100644
--- a/src/easyreflectometry/sample/collections/sample.py
+++ b/src/easyreflectometry/sample/collections/sample.py
@@ -49,6 +49,7 @@ def __init__(
             if not issubclass(type(assembly), BaseAssembly):
                 raise ValueError('The elements must be an Assembly.')
         super().__init__(name, interface, unique_name=unique_name, *assemblies, **kwargs)
+        self._disable_changes_to_outermost_layers()
 
     def add_assembly(self, assembly: Optional[BaseAssembly] = None):
         """Add an assembly to the sample.
diff --git a/tests/sample/collections/test_sample.py b/tests/sample/collections/test_sample.py
index 1cca441a..fb9955bf 100644
--- a/tests/sample/collections/test_sample.py
+++ b/tests/sample/collections/test_sample.py
@@ -51,7 +51,7 @@ def test_add_assembly(self):
         # Expect
         assert_equal(p[0].name, 'EasyMultilayer')
         assert_equal(p[1].name, 'EasyMultilayer')
-        assert_equal(p[2].name, 'New EasyMultilayer')
+        assert_equal(p[2].name, 'EasyMultilayer added')
         assert_equal(p[3].name, 'EasySurfactantLayer')
         p._enable_changes_to_outermost_layers.assert_called()
         p._disable_changes_to_outermost_layers.assert_called()
diff --git a/tests/test_project.py b/tests/test_project.py
index 8edd4de6..095b1581 100644
--- a/tests/test_project.py
+++ b/tests/test_project.py
@@ -30,8 +30,8 @@ def test_constructor(self):
 
         # Expect
         assert project._info == {
-            'name': 'Example Project',
-            'short_description': 'reflectometry, 1D',
+            'name': 'ExampleProject',
+            'short_description': 'Reflectometry, 1D',
             'samples': 'None',
             'experiments': 'None',
             'modified': datetime.datetime.now().strftime('%d.%m.%Y %H:%M'),
@@ -78,8 +78,8 @@ def test_reset(self):
 
         # Expect
         assert project._info == {
-            'name': 'Example Project',
-            'short_description': 'reflectometry, 1D',
+            'name': 'ExampleProject',
+            'short_description': 'Reflectometry, 1D',
             'samples': 'None',
             'experiments': 'None',
             'modified': datetime.datetime.now().strftime('%d.%m.%Y %H:%M'),
@@ -222,7 +222,7 @@ def test_path_json(self, tmp_path):
         project.set_path_project_parent(tmp_path)
 
         # Then Expect
-        assert project.path_json == Path(tmp_path) / 'Example Project' / 'project.json'
+        assert project.path_json == Path(tmp_path) / 'ExampleProject' / 'project.json'
 
     def test_add_material(self):
         # When
@@ -270,8 +270,8 @@ def test_default_info(self):
 
         # Expect
         assert info == {
-            'name': 'Example Project',
-            'short_description': 'reflectometry, 1D',
+            'name': 'ExampleProject',
+            'short_description': 'Reflectometry, 1D',
             'samples': 'None',
             'experiments': 'None',
             'modified': datetime.datetime.now().strftime('%d.%m.%Y %H:%M'),
@@ -294,8 +294,8 @@ def test_as_dict(self):
             'with_experiments',
         ]
         assert project_dict['info'] == {
-            'name': 'Example Project',
-            'short_description': 'reflectometry, 1D',
+            'name': 'ExampleProject',
+            'short_description': 'Reflectometry, 1D',
             'samples': 'None',
             'experiments': 'None',
             'modified': datetime.datetime.now().strftime('%d.%m.%Y %H:%M'),
@@ -491,19 +491,19 @@ def test_create(self, tmp_path):
         project = Project()
         project.set_path_project_parent(tmp_path)
         project._info['modified'] = 'modified'
-        project._info['name'] = 'Test Project'
+        project._info['name'] = 'TestProject'
 
         # Then
         project.create()
 
         # Expect
-        assert project.path == tmp_path / 'Test Project'
+        assert project.path == tmp_path / 'TestProject'
         assert project.path.exists()
         assert (project.path / 'experiments').exists()
         assert project.created is True
         assert project._info == {
-            'name': 'Test Project',
-            'short_description': 'reflectometry, 1D',
+            'name': 'TestProject',
+            'short_description': 'Reflectometry, 1D',
             'samples': 'None',
             'experiments': 'None',
             'modified': datetime.datetime.now().strftime('%d.%m.%Y %H:%M'),