gistfile1.diff

diff --git a/go/base/static/js/test/tests/components/plumbing/endpoints.test.js b/go/base/static/js/test/tests/components/plumbing/endpoints.test.js
index 8a2c2aa..a7756fd 100644
--- a/go/base/static/js/test/tests/components/plumbing/endpoints.test.js
+++ b/go/base/static/js/test/tests/components/plumbing/endpoints.test.js
@@ -299,6 +299,7 @@ describe("go.components.plumbing (endpoints)", function() {
       = plumbing.AligningEndpointCollection;
 
     var MockAligningEndpointCollection = AligningEndpointCollection.extend({
+      margin: 0,
       render: function() {
         AligningEndpointCollection.prototype.render.call(this);
         this.rendered = true;