diff --git a/lib/features/copy-paste/BpmnCopyPaste.js b/lib/features/copy-paste/BpmnCopyPaste.js
index 194c8ec3..f4c036f3 100644
--- a/lib/features/copy-paste/BpmnCopyPaste.js
+++ b/lib/features/copy-paste/BpmnCopyPaste.js
@@ -108,7 +108,7 @@ export default function BpmnCopyPaste(bpmnFactory, eventBus, moddleCopy) {
           property = reference.property;
 
       if (key === descriptor.id) {
-        element[ property ] = businessObject;
+        element.set(property, businessObject);
 
         array.push(descriptor.id);
       }
diff --git a/test/spec/features/copy-paste/BpmnCopyPasteSpec.js b/test/spec/features/copy-paste/BpmnCopyPasteSpec.js
index 3923348c..13ab5f2a 100644
--- a/test/spec/features/copy-paste/BpmnCopyPasteSpec.js
+++ b/test/spec/features/copy-paste/BpmnCopyPasteSpec.js
@@ -227,7 +227,7 @@ describe('features/copy-paste', function() {
 
     describe('integration', function() {
 
-      it('should copy conditional and default flow properties',
+      it('should copy conditionExpression and default flow properties',
         inject(function(canvas, copyPaste, elementRegistry, modeling) {
 
           // given
@@ -264,11 +264,12 @@ describe('features/copy-paste', function() {
 
           expect(conditionalFlow).to.exist;
           expect(defaultFlow).to.exist;
+          expect(Object.prototype.propertyIsEnumerable.call(taskBo, 'default')).to.be.false;
         })
       );
 
 
-      it('should copy attacher properties', inject(function(canvas, copyPaste, elementRegistry) {
+      it('should copy attachedToRef properties', inject(function(canvas, copyPaste, elementRegistry) {
 
         // given
         var task = elementRegistry.get('Task_1'),
@@ -296,11 +297,13 @@ describe('features/copy-paste', function() {
         });
 
         // then
-        expect(getBusinessObject(boundaryEvent).attachedToRef).to.equal(getBusinessObject(task));
+        var boundaryEventBo = getBusinessObject(boundaryEvent);
+
+        expect(boundaryEventBo.attachedToRef).to.equal(getBusinessObject(task));
       }));
 
 
-      it('should copy loop characteristics porperties',
+      it('should copy loopCharacteristics properties',
         inject(function(canvas, copyPaste, elementRegistry, modeling) {
 
           // given
@@ -375,7 +378,7 @@ describe('features/copy-paste', function() {
 
 
       it('should copy label', inject(
-        function(canvas, copyPaste, elementRegistry, modeling) {
+        function(canvas, copyPaste, elementRegistry) {
 
           // given
           var startEvent = elementRegistry.get('StartEvent_1'),