Issue #1504544 by Valentine94, poker10, mrinalini9, jthorson, Chi, brad.bulger, Berdir: Strict warning: Only variables should be passed by reference in run-tests.sh

Issue #3276848 by DamienMcKenna: run-tests.sh gives "Deprecated: str_replace(): Passing null to parameter" with PHP 8.0

Issue #3209417 by jedihe, mcdruid, DamienMcKenna, Fabianx, Berdir, pietmarcus, mikran, David_Rothstein: Backport from D8: run-tests.sh should allow single test methods to be run

Issue #2759197 by Fabianx, Stevel, mpdonadio, joelpittet, larowlan, gor: Improve WebTestCase performance by 50%

Issue #2798377 by mcdruid, generalredneck, MustangGB, cilefen: Use PHP_BINARY constant in run-tests.sh

Issue #3126140 by joseph.olstad, Taran2L, longwave, mcdruid, Ayesh, Fabianx, MustangGB: PHP 7.4 notice in run-tests.sh

Issue #2660766 by David_Rothstein, twistor: UpgradePathTaxonomyTestCase::testTaxonomyUpgrade() doesn't properly test field settings

Issue #2189345 by benjy, sanduhrs, Mile23, joshtaylor, jbekker, David_Rothstein, klausi, sun, zaporylie, pfrenssen, jsacksick, jibran, Mixologic, znerol, Xano, alberto56: run-tests.sh should exit with a failure code if any tests failed

Issue #2551981 by jthorson, Mixologic, Fabianx, David_Rothstein: Add --directory option to run-tests.sh test discovery

Issue #2310415 by cilefen, ednawig, TravisCarden: Fixed run-tests.sh does not handle the error when invalid test groups/classes are specified.

Issue #1693398 by donquixote, pounard, sun, Sylvain Lecoy: Allow PSR-0 test classes to be used in D7.

Issue #1006714 by Steven Jones, chx, mr.baileys, xjm, carlos8f: Fixed drupal_get_path() doesn't work for profiles.

This reverts commit 132aed37.

Issue #771448 by Damien Tournoud, attiks: Changed Use proc_open() instead of pcntl_fork() in simpletest.

- Patch #1110810 by JohnAlbin, TR: CVS $ tag lurks in .htaccess file (and other dank corners of Drupal).

- Patch #602332 by Steven Jones, pwolanin, Steven Merrill: XML output option for use with Hudson / JUnit.

#706842 by bangpound, bjaspan, Damien Tournoud, chx, aaronbauman: Fixed 'taxo as field' update broken + wipes some node/term associations .

#838438 follow-up by Damien Tournoud: db_prefix is no longer a global, wrong path given to drupal_var_export() function file.

#838438 by Damien Tournoud, chx: Added basic tests for D6 => D7 upgrade path, and framework for further extending upgrade test coverage. W00t! :D