MoPub bug when testing load ad (Banner)

[Izzyjm]

Hello, when you declare your AdMob adview with adsize(SMART BANNER) in the test suite it loads the ad, but without the test suite it fails because it says the ad size is null, I think you guys should fix the mediation test suite to fail the load ad for MoPub when they've declared the adview is using a smart banner because it actually doesn't load, its not much of a bug but some people who are using smart banners and didn't see that they are not supported will think their mopub mediation ads will load when in fact they will fail