I\'m using IntelliJ IDEA 15.0.2 (Community Edition) under Windows 7 and Windows 10 Pro, Gradle 2.9, JDK 1.7.0_65. Operating systems installed as guests under VMware Workstat
Gabor's suggestion seemed to fix this issue for me. On a Mac (and I presume on a Windows machine, but with a different route to get there) go to Preferences:
From the menu bar at the top Android Studio → Preferences
or
Hit ⌘ and , to jump straight to it.
Then in the menu search box type "instant". Uncheck the box that says "Enable instant run..", which looks like the image below.
That fixed it for me; didn't even need to restart/kill ADB.
It seems to be enabled by default, and I use it often to hot-swap changes during development, so I didn't think to turn it off when running Espresso tests.