Issue #2961691 by alexpott, Berdir, timmillwood, idebr: Change SYMFONY_DEPRECATIONS_HELPER back to strict

Issue #2901730 by mfernea, ankitjain28may, idebr: Fix 'Squiz.WhiteSpace.FunctionSpacing' coding standard

Issue #2927806 by alexpott, mondrake, jibran, Mile23: Use PHPUnit 6 for testing when PHP version >= 7.2

Issue #2881012 by Lendude, dawehner, michielnugter: Move generatePermutations out of testbase into a trait

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2787577 by alexpott, dawehner: When tests use multiple namespaces they should do so in a coding standards compliant way

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2381277 by dawehner, plach, damiankloip, alexpott, olli, fgm, Wim Leers, Fabianx: Make Views use render caching and remove Views' own "output caching"

Issue #2478483 by Wim Leers, Fabianx: Introduce placeholders (#lazy_builder) to replace #post_render_cache

Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit

Issue #2347465 by tim.plunkett, dawehner, cilefen: Convert all instances of #type link/links to convert to use routes.

Issue #2260121 by sun: PHPUnit Tests namespace of modules is ambiguous with regular runtime namespace (+ Simpletest tests).

Issue #2324783 by JayeshSolanki | andypost: Fixed CommentLinkBuilderTest::setUp() should be protected.

Issue #2318251 by larowlan: Fixed Make comment links functionality testable and convert CommentLinkTest to PHPUnit.