diff --git a/tests/test_bl_types/test_material.py b/tests/test_bl_types/test_material.py
index 910d4bc..953bae2 100644
--- a/tests/test_bl_types/test_material.py
+++ b/tests/test_bl_types/test_material.py
@@ -7,13 +7,12 @@ import bpy
 from multi_user.bl_types.bl_material import BlMaterial
 
 
-def test_material(clear_blend):
+def test_material_nodes(clear_blend):
     nodes_types = [node.bl_rna.identifier for node in bpy.types.ShaderNode.__subclasses__()]
-    
+
     datablock = bpy.data.materials.new("test")
     datablock.use_nodes = True
-    bpy.data.materials.create_gpencil_data(datablock)
-    
+
     for ntype in nodes_types:
         datablock.node_tree.nodes.new(ntype) 
 
@@ -26,3 +25,18 @@ def test_material(clear_blend):
     result = implementation._dump(test)
 
     assert not DeepDiff(expected, result)
+
+
+def test_material_gpencil(clear_blend):
+    datablock = bpy.data.materials.new("test")
+    bpy.data.materials.create_gpencil_data(datablock)
+
+    implementation = BlMaterial()
+    expected = implementation._dump(datablock)
+    bpy.data.materials.remove(datablock)
+
+    test = implementation._construct(expected)
+    implementation._load(expected, test)
+    result = implementation._dump(test)
+
+    assert not DeepDiff(expected, result)