diff --git a/test/fixtures/bpmn/collapsed-sub-process-legacy.bpmn b/test/fixtures/bpmn/collapsed-sub-process-legacy.bpmn
new file mode 100644
index 00000000..36419099
--- /dev/null
+++ b/test/fixtures/bpmn/collapsed-sub-process-legacy.bpmn
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:modeler="http://camunda.org/schema/modeler/1.0" id="Definitions_0763oqv" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="4.8.0" modeler:executionPlatform="Camunda Platform" modeler:executionPlatformVersion="7.15.0">
+  <bpmn:process id="Process" isExecutable="true">
+    <bpmn:startEvent id="StartEvent_1" />
+    <bpmn:subProcess id="SubProcess">
+      <bpmn:startEvent id="Event_0lrpy3a">
+        <bpmn:outgoing>Flow_0obnxbt</bpmn:outgoing>
+      </bpmn:startEvent>
+      <bpmn:sequenceFlow id="Flow_0obnxbt" sourceRef="Event_0lrpy3a" targetRef="NestedSubProcess" />
+      <bpmn:endEvent id="Event_1ic2bhx">
+        <bpmn:incoming>Flow_1d6ajf7</bpmn:incoming>
+      </bpmn:endEvent>
+      <bpmn:subProcess id="NestedSubProcess">
+        <bpmn:incoming>Flow_0obnxbt</bpmn:incoming>
+        <bpmn:outgoing>Flow_1d6ajf7</bpmn:outgoing>
+        <bpmn:startEvent id="subprocess_startEvent" />
+      </bpmn:subProcess>
+      <bpmn:sequenceFlow id="Flow_1d6ajf7" sourceRef="NestedSubProcess" targetRef="Event_1ic2bhx" />
+    </bpmn:subProcess>
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process">
+      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
+        <dc:Bounds x="179" y="159" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="SubProcess_di" bpmnElement="SubProcess">
+        <dc:Bounds x="250" y="130" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_1d6ajf7_di" bpmnElement="Flow_1d6ajf7">
+        <di:waypoint x="740" y="240" />
+        <di:waypoint x="782" y="240" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0obnxbt_di" bpmnElement="Flow_0obnxbt">
+        <di:waypoint x="308" y="240" />
+        <di:waypoint x="350" y="240" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Event_0lrpy3a_di" bpmnElement="Event_0lrpy3a">
+        <dc:Bounds x="272" y="222" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="NestedSubProcess_di" bpmnElement="NestedSubProcess">
+        <dc:Bounds x="350" y="120" width="390" height="240" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="subprocess_startEvent_di" bpmnElement="subprocess_startEvent">
+        <dc:Bounds x="410" y="222" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_1ic2bhx_di" bpmnElement="Event_1ic2bhx">
+        <dc:Bounds x="782" y="222" width="36" height="36" />
+      </bpmndi:BPMNShape>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>
diff --git a/test/spec/ModelerSpec.js b/test/spec/ModelerSpec.js
index c023e046..d016f9a2 100644
--- a/test/spec/ModelerSpec.js
+++ b/test/spec/ModelerSpec.js
@@ -710,8 +710,7 @@ describe('Modeler', function() {
 
   describe('drill down', function() {
 
-    it('should allow drill down into collapsed sub-process', function() {
-      var xml = require('../fixtures/bpmn/collapsed-sub-process.bpmn');
+    function verifyDrilldown(xml) {
 
       return createModeler(xml).then(function() {
         var drilldown = container.querySelector('.bjs-drilldown');
@@ -730,6 +729,19 @@ describe('Modeler', function() {
         expect(djsContainer.classList.contains('bjs-breadcrumbs-shown')).to.be.true;
       });
 
+    }
+
+    it('should allow drill down into collapsed sub-process', function() {
+      var xml = require('../fixtures/bpmn/collapsed-sub-process.bpmn');
+
+      return verifyDrilldown(xml);
+    });
+
+
+    it('should allow drill down into legacy collapsed sub-process', function() {
+      var xml = require('../fixtures/bpmn/collapsed-sub-process-legacy.bpmn');
+
+      return verifyDrilldown(xml);
     });
 
   });
diff --git a/test/spec/ViewerSpec.js b/test/spec/ViewerSpec.js
index 32f87c5d..d41c867b 100644
--- a/test/spec/ViewerSpec.js
+++ b/test/spec/ViewerSpec.js
@@ -372,9 +372,7 @@ describe('Viewer', function() {
 
   describe('drill down', function() {
 
-    it('should allow drill down into collapsed sub-process', function() {
-
-      var xml = require('../fixtures/bpmn/collapsed-sub-process.bpmn');
+    function verifyDrilldown(xml) {
 
       return createViewer(container, Viewer, xml).then(function() {
         var drilldown = container.querySelector('.bjs-drilldown');
@@ -393,6 +391,19 @@ describe('Viewer', function() {
         expect(djsContainer.classList.contains('bjs-breadcrumbs-shown')).to.be.true;
       });
 
+    }
+
+    it('should allow drill down into collapsed sub-process', function() {
+      var xml = require('../fixtures/bpmn/collapsed-sub-process.bpmn');
+
+      return verifyDrilldown(xml);
+    });
+
+
+    it('should allow drill down into legacy collapsed sub-process', function() {
+      var xml = require('../fixtures/bpmn/collapsed-sub-process-legacy.bpmn');
+
+      return verifyDrilldown(xml);
     });
 
   });