Safari Preferences/Security/Enable Plugins & Enable Java
Uncheck the options for plugins and java once done with PingTest.net
That's where I'm confused. I am certain my OS is up to date and that Java 2012-003 is installed and that Java is enabled in Safari's preferences. But, when I go to SpeedTest.net, I am met with a note that I have an inactive Plug-in. If I then follow their prompts, I am advised that I must click on their Enable button and restart.
And then things work as designed. But since I already had Java enabled, why the extra steps?