diff --git a/src/webgldrawer.js b/src/webgldrawer.js
index 490bd374..d9fbe2b1 100644
--- a/src/webgldrawer.js
+++ b/src/webgldrawer.js
@@ -1337,7 +1337,6 @@
         _doRenderingTest(){
             // Avoid infinite call stack by only testing once
             if( testing ){
-                this._isTestingViewer = true;
                 return;
             }
             // Set the testing flag to true until the test viewer has been created