diff --git a/lib/features/modeling/behavior/GroupBehavior.js b/lib/features/modeling/behavior/GroupBehavior.js
index 2cba2453..fd43293b 100644
--- a/lib/features/modeling/behavior/GroupBehavior.js
+++ b/lib/features/modeling/behavior/GroupBehavior.js
@@ -24,7 +24,7 @@ var HIGH_PRIORITY = 2000;
  */
 export default function GroupBehavior(
     bpmnFactory,
-    canvas,
+    bpmnjs,
     elementRegistry,
     eventBus,
     injector,
@@ -32,18 +32,6 @@ export default function GroupBehavior(
 ) {
   injector.invoke(CommandInterceptor, this);
 
-  /**
-   * Gets process definitions
-   *
-   * @return {ModdleElement} definitions
-   */
-  function getDefinitions() {
-    var rootElement = canvas.getRootElement(),
-        businessObject = getBusinessObject(rootElement);
-
-    return businessObject.$parent;
-  }
-
   /**
    * Removes a referenced category value for a given group shape
    *
@@ -79,7 +67,7 @@ export default function GroupBehavior(
    */
   function removeCategory(category) {
 
-    var definitions = getDefinitions();
+    var definitions = bpmnjs.getDefinitions();
 
     collectionRemove(definitions.get('rootElements'), category);
   }
@@ -144,7 +132,7 @@ export default function GroupBehavior(
 
       var businessObject = getBusinessObject(shape),
           categoryValueRef = businessObject.categoryValueRef,
-          definitions = getDefinitions(),
+          definitions = bpmnjs.getDefinitions(),
           category = categoryValueRef ? categoryValueRef.$parent : null;
 
       collectionAdd(category.get('categoryValue'), categoryValueRef);
@@ -162,7 +150,7 @@ export default function GroupBehavior(
 
     if (is(businessObject, 'bpmn:Group') && !businessObject.categoryValueRef) {
 
-      var definitions = getDefinitions(),
+      var definitions = bpmnjs.getDefinitions(),
           categoryValue = createCategoryValue(definitions, bpmnFactory);
 
       // link the reference to the Group
@@ -190,7 +178,7 @@ export default function GroupBehavior(
         categoryValue;
 
     if (is(property, 'bpmn:CategoryValue')) {
-      categoryValue = createCategoryValue(getDefinitions(), bpmnFactory);
+      categoryValue = createCategoryValue(bpmnjs.getDefinitions(), bpmnFactory);
 
       // return copy of category
       return moddleCopy.copyElement(property, categoryValue);
@@ -201,7 +189,7 @@ export default function GroupBehavior(
 
 GroupBehavior.$inject = [
   'bpmnFactory',
-  'canvas',
+  'bpmnjs',
   'elementRegistry',
   'eventBus',
   'injector',
diff --git a/test/spec/features/modeling/behavior/GroupBehaviorSpec.bpmn b/test/spec/features/modeling/behavior/GroupBehaviorSpec.bpmn
index 940a1d75..2729d3a0 100644
--- a/test/spec/features/modeling/behavior/GroupBehaviorSpec.bpmn
+++ b/test/spec/features/modeling/behavior/GroupBehaviorSpec.bpmn
@@ -8,6 +8,7 @@
     <categoryValue id="CategoryValue_3" value="Value 3" />
   </category>
   <process id="Process_1" isExecutable="false">
+    <subProcess id="Subprocess_1" />
     <group id="Group_1" categoryValueRef="CategoryValue_1" />
     <group id="Group_2" categoryValueRef="CategoryValue_1" />
     <group id="Group_3" categoryValueRef="CategoryValue_2" />
@@ -15,6 +16,9 @@
   </process>
   <bpmndi:BPMNDiagram id="BPMNDiagram_1">
     <bpmndi:BPMNPlane bpmnElement="Process_1">
+      <bpmndi:BPMNShape id="Activity_0zvwgk9_di" bpmnElement="Subprocess_1">
+        <omgdc:Bounds x="160" y="360" width="100" height="80" />
+      </bpmndi:BPMNShape>
       <bpmndi:BPMNShape id="Group_1_di" bpmnElement="Group_1">
         <omgdc:Bounds x="162" y="75" width="200" height="200" />
         <bpmndi:BPMNLabel>
@@ -32,4 +36,7 @@
       </bpmndi:BPMNShape>
     </bpmndi:BPMNPlane>
   </bpmndi:BPMNDiagram>
-</definitions>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1g3s90h">
+    <bpmndi:BPMNPlane id="BPMNPlane_1ezo7xu" bpmnElement="Subprocess_1" />
+  </bpmndi:BPMNDiagram>
+</definitions>
\ No newline at end of file
diff --git a/test/spec/features/modeling/behavior/GroupBehaviorSpec.js b/test/spec/features/modeling/behavior/GroupBehaviorSpec.js
index d21d5f5a..b6d3bf11 100644
--- a/test/spec/features/modeling/behavior/GroupBehaviorSpec.js
+++ b/test/spec/features/modeling/behavior/GroupBehaviorSpec.js
@@ -220,6 +220,47 @@ describe('features/modeling/behavior - groups', function() {
 
     });
 
+
+    it('should always create new Category in definitions',
+      inject(function(canvas, elementFactory, modeling, bpmnjs) {
+
+        // given
+        var group = elementFactory.createShape({ type: 'bpmn:Group' }),
+            root = canvas.findRoot('Subprocess_1_plane'),
+            rootParent = getBusinessObject(root).$parent,
+            definitions = bpmnjs._definitions;
+
+        canvas.setRootElement(root);
+
+        // when
+        var groupShape = modeling.createShape(group, { x: 100, y: 100 }, root),
+            categoryValueRef = getBusinessObject(groupShape).categoryValueRef,
+            category = categoryValueRef.$parent;
+
+        // then
+        expect(categoryValueRef).to.exist;
+        expect(category).to.exist;
+
+        expectIncludedOrNot(
+          category.get('categoryValue'),
+          categoryValueRef,
+          true
+        );
+
+        expectIncludedOrNot(
+          definitions.get('rootElements'),
+          category,
+          true
+        );
+
+        expectIncludedOrNot(
+          rootParent.get('rootElements'),
+          category,
+          false
+        );
+
+      }));
+
   });