Issue #2933424 by David_Rothstein, harsha012, jhodgdon, vaplas: English-specific links to php.net shouldn't be used in non-translatable strings

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

Issue #2870194 by alexpott, Mile23, jibran, larowlan, tim.plunkett: Ensure that process-isolated tests can use Symfony's PHPunit bridge to catch usages of deprecated code

Issue #2869120 by penyaskito, Mixologic, Berdir: run-tests.sh ignores classes if they have whitespace before the declaration using --directory

Issue #2850797 by maxocub, dawehner, alexpott: Prepare our phpunit tests to be BC compatible with phpunit 5.x/6.x

Issue #2829484 by vegantriathlete, 20th, xjm: Incorrect spelling of possessive "its own" in multiple comments

Issue #2804675 by alexpott, hideaway: Tests using TestDatabase class are stuck in an infinite loop in Windows (8.2.0-rc2 only)

Issue #2776071 by damiankloip, neclimdul, Mixologic: run-tests.sh does not return a non zero status when tests fail with exception

Revert "Issue #2776071 by damiankloip: run-tests.sh does not return a non zero status when tests fail with exception"

This reverts commit b026909e.

Issue #2776071 by damiankloip: run-tests.sh does not return a non zero status when tests fail with exception

Issue #2575725 by alexpott, lokapujya, rajeshwari10, Torenware, andrewbelcher, pashupathi nath gajawada, jonathan1055: Uncaught PHP Exception when selecting too many PHPunit tests in UI

Issue #2680057 by alexpott, dawehner, isntall: Allow to not override the simpletest results on a new test run

Issue #2670978 by dawehner, isntall, jibran, alexpott: Allow to run just specific types when running all tests

Issue #2189345 by benjy, sanduhrs, Mile23, joshtaylor, jbekker, klausi, sun, zaporylie, pfrenssen, jsacksick: run-tests.sh should exit with a failure code if any tests failed

Issue #2580293 by alexpott, claudiu.cristea, Mixologic, catch, Fabianx: Patch having test with "PHP Fatal error" is marked as PASSED

Revert "Issue #2510380 by Wim Leers, DuaelFr, mlewand, quicksketch, Reinmar, oleq: Images cannot be linked in CKEditor"

This reverts commit 2d342c0f.

Issue #2510380 by Wim Leers, DuaelFr, mlewand, quicksketch, Reinmar, oleq: Images cannot be linked in CKEditor

Issue #2304461 by dawehner, neclimdul, naveenvalecha, jibran, tim.plunkett, phenaproxima, Xano, hussainweb, sun, hitesh-jain, amateescu, alexpott, daffie, Mile23, Wim Leers, larowlan: KernelTestBaseTNG™

Issue #2232861 by grom358, daffie, alexpott, larowlan, pfrenssen, hussainweb, pcambra, jibran, phenaproxima, moshe weitzman, nick_schuch: Create BrowserTestBase for web-testing on top of Mink