diff --git a/multi_user/bl_types/bl_curve.py b/multi_user/bl_types/bl_curve.py
index caa1754..205f8cc 100644
--- a/multi_user/bl_types/bl_curve.py
+++ b/multi_user/bl_types/bl_curve.py
@@ -87,7 +87,20 @@ class BlCurve(BlDatablock):
     def _dump_implementation(self, data, instance=None):
         assert(instance)
         dumper = Dumper()
-
+        # Conflicting attributes
+        # TODO: remove them with the NURBS support
+        dumper.exclude_filter = [
+            'users',
+            'order_u',
+            'order_v',
+            'point_count_v',
+            'point_count_u',
+            'active_textbox'
+        ]
+        if instance.use_auto_texspace:
+            dumper.exclude_filter.extend([
+                'texspace_location',
+                'texspace_size'])
         data = dumper.dump(instance)
         data['splines'] = {}
 
diff --git a/multi_user/bl_types/bl_metaball.py b/multi_user/bl_types/bl_metaball.py
index 32d3f01..503839c 100644
--- a/multi_user/bl_types/bl_metaball.py
+++ b/multi_user/bl_types/bl_metaball.py
@@ -88,12 +88,15 @@ class BlMetaball(BlDatablock):
         assert(instance)
         dumper = Dumper()
         dumper.depth = 1
-        dumper.exclude_filter = [
-            "is_editmode",
-            "is_evaluated",
-            "is_embedded_data",
-            "is_library_indirect",
-            "name_full"
+        dumper.include_filter = [
+            'name',
+            'resolution',
+            'render_resolution',
+            'threshold',
+            'update_method',
+            'use_auto_texspace',
+            'texspace_location',
+            'texspace_size'
         ]
 
         data = dumper.dump(instance)
diff --git a/multi_user/bl_types/bl_scene.py b/multi_user/bl_types/bl_scene.py
index a563af3..95ce1cc 100644
--- a/multi_user/bl_types/bl_scene.py
+++ b/multi_user/bl_types/bl_scene.py
@@ -37,7 +37,6 @@ class BlScene(BlDatablock):
         return instance
 
     def _load_implementation(self, data, target):
-        target = self.instance
         # Load other meshes metadata
         loader = Loader()
         loader.load(target, data)
diff --git a/tests/test_bl_types/test_curve.py b/tests/test_bl_types/test_curve.py
new file mode 100644
index 0000000..4432d4d
--- /dev/null
+++ b/tests/test_bl_types/test_curve.py
@@ -0,0 +1,29 @@
+import os
+
+import pytest
+from deepdiff import DeepDiff
+
+import bpy
+import random
+from multi_user.bl_types.bl_curve import BlCurve
+
+@pytest.mark.parametrize('curve_type', ['TEXT','BEZIER'])
+def test_curve(clear_blend, curve_type):
+    if curve_type == 'TEXT':
+        bpy.ops.object.text_add(enter_editmode=False, align='WORLD', location=(0, 0, 0))
+    elif curve_type == 'BEZIER':
+        bpy.ops.curve.primitive_bezier_curve_add(enter_editmode=False, align='WORLD', location=(0, 0, 0))
+    else: #TODO: NURBS support
+        bpy.ops.surface.primitive_nurbs_surface_curve_add(radius=1, enter_editmode=False, align='WORLD', location=(0, 0, 0))
+
+    datablock = bpy.data.curves[0]
+
+    implementation = BlCurve()
+    expected = implementation._dump(datablock)
+    bpy.data.curves.remove(datablock)
+
+    test = implementation._construct(expected)
+    implementation._load(expected, test)
+    result = implementation._dump(test)
+
+    assert not DeepDiff(expected, result)
diff --git a/tests/test_bl_types/test_lattice.py b/tests/test_bl_types/test_lattice.py
new file mode 100644
index 0000000..fc23e5f
--- /dev/null
+++ b/tests/test_bl_types/test_lattice.py
@@ -0,0 +1,23 @@
+import os
+
+import pytest
+from deepdiff import DeepDiff
+
+import bpy
+from multi_user.bl_types.bl_lattice import BlLattice
+
+
+def test_lattice(clear_blend):
+    bpy.ops.object.add(type='LATTICE', enter_editmode=False, align='WORLD', location=(0, 0, 0))
+
+    datablock = bpy.data.lattices[0]
+
+    implementation = BlLattice()
+    expected = implementation._dump(datablock)
+    bpy.data.lattices.remove(datablock)
+
+    test = implementation._construct(expected)
+    implementation._load(expected, test)
+    result = implementation._dump(test)
+
+    assert not DeepDiff(expected, result)
diff --git a/tests/test_bl_types/test_lightprobes.py b/tests/test_bl_types/test_lightprobes.py
new file mode 100644
index 0000000..391a391
--- /dev/null
+++ b/tests/test_bl_types/test_lightprobes.py
@@ -0,0 +1,24 @@
+import os
+
+import pytest
+from deepdiff import DeepDiff
+
+import bpy
+from multi_user.bl_types.bl_lightprobe import BlLightprobe
+
+
+@pytest.mark.skipif(bpy.app.version[1] < 83, reason="requires blender 2.83 or higher")
+@pytest.mark.parametrize('lightprobe_type', ['PLANAR','GRID','CUBEMAP'])
+def test_lightprobes(clear_blend, lightprobe_type):
+    bpy.ops.object.lightprobe_add(type=lightprobe_type)
+
+    blender_light = bpy.data.lightprobes[0]
+    lightprobe_dumper = BlLightprobe()
+    expected = lightprobe_dumper._dump(blender_light)
+    bpy.data.lightprobes.remove(blender_light)
+
+    test = lightprobe_dumper._construct(expected)
+    lightprobe_dumper._load(expected, test)
+    result = lightprobe_dumper._dump(test)
+
+    assert not DeepDiff(expected, result)
diff --git a/tests/test_bl_types/test_metaball.py b/tests/test_bl_types/test_metaball.py
new file mode 100644
index 0000000..cb7a1f1
--- /dev/null
+++ b/tests/test_bl_types/test_metaball.py
@@ -0,0 +1,23 @@
+import os
+
+import pytest
+from deepdiff import DeepDiff
+
+import bpy
+from multi_user.bl_types.bl_metaball import BlMetaball
+
+
+@pytest.mark.parametrize('metaballs_type', ['PLANE','CAPSULE','BALL','ELLIPSOID','CUBE'])
+def test_metaball(clear_blend, metaballs_type):
+    bpy.ops.object.metaball_add(type=metaballs_type)
+
+    datablock = bpy.data.metaballs[0]
+    dumper = BlMetaball()
+    expected = dumper._dump(datablock)
+    bpy.data.metaballs.remove(datablock)
+
+    test = dumper._construct(expected)
+    dumper._load(expected, test)
+    result = dumper._dump(test)
+
+    assert not DeepDiff(expected, result)
diff --git a/tests/test_bl_types/test_scene.py b/tests/test_bl_types/test_scene.py
new file mode 100644
index 0000000..2772a00
--- /dev/null
+++ b/tests/test_bl_types/test_scene.py
@@ -0,0 +1,22 @@
+import os
+
+import pytest
+from deepdiff import DeepDiff
+
+import bpy
+import random
+from multi_user.bl_types.bl_scene import BlScene
+
+def test_scene(clear_blend):
+    datablock = bpy.data.scenes.new("toto")
+    
+    # Test
+    implementation = BlScene()
+    expected = implementation._dump(datablock)
+    bpy.data.scenes.remove(datablock)
+
+    test = implementation._construct(expected)
+    implementation._load(expected, test)
+    result = implementation._dump(test)
+
+    assert not DeepDiff(expected, result)