Merge pull request #6768 from jdfreder/remotetestfix

Fix an issue in the `kernel_running` function of the JS tests,

IPython/html/tests/util.js

@@ -58,7 +58,10 b' casper.page_loaded = function() {'
 casper.kernel_running = function() {
     // Return whether or not the kernel is running.
     return this.evaluate(function() {
-        return IPython.notebook.kernel.is_connected();
+        return IPython &&
+        IPython.notebook &&
+        IPython.notebook.kernel &&
+        IPython.notebook.kernel.is_connected();
     });
 };