Commit 7608437 introduced a regression in Deferred tests for Android 4.0. If I read that right, its strict mode is a little buggy, causing test failures: http://swarm.jquery.org/result/1233856.
We need to decide what to do about it. Considering low usage of this browser (2.2% of all Android usage as of April 4, 2016 according to Google Play stats) maybe we should skip those few tests in Android 4.0.
Deferred: Remove default callback context
Employs strict mode to simplify Deferred callback context handling.
Deferred: Provide explicit undefined context for jQuery.when raw casts