1 files changed, 3 insertions, 0 deletions
diff --git a/install/ui/test/build_tests.js b/install/ui/test/build_tests.js
index fec8717b..603f41fa 100644
--- a/install/ui/test/build_tests.js
+++ b/install/ui/test/build_tests.js
@@ -59,6 +59,7 @@ test('Testing builder', function() {
 
     var o2 = b2.build({});
     var o21 = b2.build({ foo: 'baz'});
+    var o22 = b2.build(o21);
 
     var r1 = { foo: 'bar' };
     var r11 = { foo: 'baz' };
@@ -71,6 +72,8 @@ test('Testing builder', function() {
     deepEqual(o2, r2, 'Constructor, default');
     deepEqual(o21, r21, 'Constructor, spec use');
 
+    strictEqual(o21, o22, 'Don\'t build built object');
+
 });
 
 test('Testing Spec_mod', function() {