unit tests: Use MainConfigNames constant to refer configs

When creating ServiceOptions objects or fake HashConfigs use the
constant to refer the config name

Change-Id: I59a29f25b76e896c07e82156c6cc4494f98e64cc

33 files changed, 258 insertions, 223 deletions

diff --git a/tests/phpunit/unit/includes/FauxResponseTest.php b/tests/phpunit/unit/includes/FauxResponseTest.php
index 022be5a7f0f3..da992ba40aa9 100644
--- a/tests/phpunit/unit/includes/FauxResponseTest.php
+++ b/tests/phpunit/unit/includes/FauxResponseTest.php
@@ -20,6 +20,8 @@
  * @file
  */
 
+use MediaWiki\MainConfigNames;
+
 class FauxResponseTest extends \MediaWikiUnitTestCase {
 	/** @var FauxResponse */
 	protected $response;
@@ -48,12 +50,12 @@ class FauxResponseTest extends \MediaWikiUnitTestCase {
 		];
 
 		$this->response->setCookieConfig( new HashConfig( [
-			'CookiePath' => '/',
-			'CookiePrefix' => false,
-			'CookieDomain' => '',
-			'CookieSecure' => 'detect',
-			'CookieExpiration' => '60',
-			'CookieHttpOnly' => true,
+			MainConfigNames::CookiePath => '/',
+			MainConfigNames::CookiePrefix => false,
+			MainConfigNames::CookieDomain => '',
+			MainConfigNames::CookieSecure => 'detect',
+			MainConfigNames::CookieExpiration => '60',
+			MainConfigNames::CookieHttpOnly => true,
 		] ) );
 
 		$this->assertNull( $this->response->getCookie( 'xkey' ), 'Non-existing cookie' );
diff --git a/tests/phpunit/unit/includes/Permissions/GrantsInfoTest.php b/tests/phpunit/unit/includes/Permissions/GrantsInfoTest.php
index 3a7ed9010aa5..b90fa48bf2d2 100644
--- a/tests/phpunit/unit/includes/Permissions/GrantsInfoTest.php
+++ b/tests/phpunit/unit/includes/Permissions/GrantsInfoTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\Unit\Permissions;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Permissions\GrantsInfo;
 use MediaWikiUnitTestCase;
 
@@ -18,14 +19,14 @@ class GrantsInfoTest extends MediaWikiUnitTestCase {
 		parent::setUp();
 
 		$config = [
-			'GrantPermissions' => [
+			MainConfigNames::GrantPermissions => [
 				'hidden1' => [ 'read' => true, 'autoconfirmed' => false ],
 				'hidden2' => [ 'autoconfirmed' => true ],
 				'normal' => [ 'edit' => true ],
 				'normal2' => [ 'edit' => true, 'create' => true ],
 				'admin' => [ 'protect' => true, 'delete' => true ],
 			],
-			'GrantPermissionGroups' => [
+			MainConfigNames::GrantPermissionGroups => [
 				'hidden1' => 'hidden',
 				'hidden2' => 'hidden',
 				'normal' => 'normal-group',
diff --git a/tests/phpunit/unit/includes/Permissions/GroupPermissionsLookupTest.php b/tests/phpunit/unit/includes/Permissions/GroupPermissionsLookupTest.php
index e03158f32ade..e9c3a9250174 100644
--- a/tests/phpunit/unit/includes/Permissions/GroupPermissionsLookupTest.php
+++ b/tests/phpunit/unit/includes/Permissions/GroupPermissionsLookupTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\Unit\Permissions;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Permissions\GroupPermissionsLookup;
 use MediaWikiUnitTestCase;
 
@@ -14,7 +15,7 @@ class GroupPermissionsLookupTest extends MediaWikiUnitTestCase {
 	private function createGroupPermissionsLookup(): GroupPermissionsLookup {
 		return new GroupPermissionsLookup(
 			new ServiceOptions( GroupPermissionsLookup::CONSTRUCTOR_OPTIONS, [
-				'GroupPermissions' => [
+				MainConfigNames::GroupPermissions => [
 					'unittesters' => [
 						'test' => true,
 						'runtest' => true,
@@ -26,7 +27,7 @@ class GroupPermissionsLookupTest extends MediaWikiUnitTestCase {
 						'modifytest' => true,
 					],
 				],
-				'RevokePermissions' => [
+				MainConfigNames::RevokePermissions => [
 					'unittesters' => [
 						'nukeworld' => true,
 					],
@@ -34,7 +35,7 @@ class GroupPermissionsLookupTest extends MediaWikiUnitTestCase {
 						'runtest' => true,
 					],
 				],
-				'GroupInheritsPermissions' => [
+				MainConfigNames::GroupInheritsPermissions => [
 					'inheritedtesters' => 'unittesters',
 				],
 			] )
diff --git a/tests/phpunit/unit/includes/Permissions/PermissionManagerTest.php b/tests/phpunit/unit/includes/Permissions/PermissionManagerTest.php
index 761f5d47e2b1..1dc3ea88b47a 100644
--- a/tests/phpunit/unit/includes/Permissions/PermissionManagerTest.php
+++ b/tests/phpunit/unit/includes/Permissions/PermissionManagerTest.php
@@ -6,6 +6,7 @@ use MediaWiki\Actions\ActionFactory;
 use MediaWiki\Block\BlockErrorFormatter;
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\HookContainer\HookContainer;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\RedirectLookup;
 use MediaWiki\Permissions\GroupPermissionsLookup;
 use MediaWiki\Permissions\PermissionManager;
@@ -34,18 +35,18 @@ class PermissionManagerTest extends MediaWikiUnitTestCase {
 	private function getPermissionManager( $options = [] ) {
 		$overrideConfig = $options['config'] ?? [];
 		$baseConfig = [
-			'WhitelistRead' => false,
-			'WhitelistReadRegexp' => false,
-			'EmailConfirmToEdit' => false,
-			'BlockDisablesLogin' => false,
-			'EnablePartialActionBlocks' => false,
-			'GroupPermissions' => [],
-			'RevokePermissions' => [],
-			'GroupInheritsPermissions' => [],
-			'AvailableRights' => [],
-			'NamespaceProtection' => [ NS_MEDIAWIKI => 'editinterface' ],
-			'RestrictionLevels' => [ '', 'autoconfirmed', 'sysop' ],
-			'DeleteRevisionsLimit' => false,
+			MainConfigNames::WhitelistRead => false,
+			MainConfigNames::WhitelistReadRegexp => false,
+			MainConfigNames::EmailConfirmToEdit => false,
+			MainConfigNames::BlockDisablesLogin => false,
+			MainConfigNames::EnablePartialActionBlocks => false,
+			MainConfigNames::GroupPermissions => [],
+			MainConfigNames::RevokePermissions => [],
+			MainConfigNames::GroupInheritsPermissions => [],
+			MainConfigNames::AvailableRights => [],
+			MainConfigNames::NamespaceProtection => [ NS_MEDIAWIKI => 'editinterface' ],
+			MainConfigNames::RestrictionLevels => [ '', 'autoconfirmed', 'sysop' ],
+			MainConfigNames::DeleteRevisionsLimit => false,
 		];
 		$config = $overrideConfig + $baseConfig;
 		$specialPageFactory = $options['specialPageFactory'] ??
@@ -369,7 +370,7 @@ class PermissionManagerTest extends MediaWikiUnitTestCase {
 
 		// Overrides needed in case `groupHasPermission` is called
 		$config = [
-			'GroupPermissions' => [
+			MainConfigNames::GroupPermissions => [
 				'autoconfirmed' => [
 					'move' => true
 				]
diff --git a/tests/phpunit/unit/includes/Permissions/RestrictionStoreTest.php b/tests/phpunit/unit/includes/Permissions/RestrictionStoreTest.php
index 7d3463e5851b..56a80c5ab32f 100644
--- a/tests/phpunit/unit/includes/Permissions/RestrictionStoreTest.php
+++ b/tests/phpunit/unit/includes/Permissions/RestrictionStoreTest.php
@@ -6,6 +6,7 @@ use DatabaseTestHelper;
 use LinkCache;
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\Linker\LinksMigration;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\PageIdentity;
 use MediaWiki\Page\PageIdentityValue;
 use MediaWiki\Page\PageReferenceValue;
@@ -80,10 +81,10 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 	private function newRestrictionStore( array $options = [] ): RestrictionStore {
 		return new RestrictionStore(
 			new ServiceOptions( RestrictionStore::CONSTRUCTOR_OPTIONS, $options + [
-				'NamespaceProtection' => [],
-				'RestrictionLevels' => [ '', 'autoconfirmed', 'sysop' ],
-				'RestrictionTypes' => self::DEFAULT_RESTRICTION_TYPES,
-				'SemiprotectedRestrictionLevels' => [ 'autoconfirmed' ],
+				MainConfigNames::NamespaceProtection => [],
+				MainConfigNames::RestrictionLevels => [ '', 'autoconfirmed', 'sysop' ],
+				MainConfigNames::RestrictionTypes => self::DEFAULT_RESTRICTION_TYPES,
+				MainConfigNames::SemiprotectedRestrictionLevels => [ 'autoconfirmed' ],
 			] ),
 			$this->createNoOpMock( WANObjectCache::class ),
 			$this->newMockLoadBalancer( $options['db'] ?? [] ),
@@ -259,7 +260,7 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 					(object)[ 'pr_type' => 'move', 'pr_level' => 'sysop',
 						'pr_expiry' => 'infinity', 'pr_cascade' => 0 ],
 				],
-				[ 'RestrictionTypes' => [ 'create', 'edit', 'upload' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create', 'edit', 'upload' ] ],
 			],
 			'Expired protection' => [
 				[ 'edit' => [], 'move' => [ 'sysop' ] ],
@@ -531,13 +532,13 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 				false,
 				[ (object)[ 'pr_type' => 'edit', 'pr_level' => 'autoconfirmed',
 						'pr_expiry' => 'infinity', 'pr_cascade' => '0' ] ],
-				[ 'SemiprotectedRestrictionLevels' => [] ],
+				[ MainConfigNames::SemiprotectedRestrictionLevels => [] ],
 			],
 			'Config with editsemiprotected' => [
 				true,
 				[ (object)[ 'pr_type' => 'edit', 'pr_level' => 'autoconfirmed',
 						'pr_expiry' => 'infinity', 'pr_cascade' => '0' ] ],
-				[ 'SemiprotectedRestrictionLevels' => [ 'editsemiprotected' ] ],
+				[ MainConfigNames::SemiprotectedRestrictionLevels => [ 'editsemiprotected' ] ],
 			],
 			'Data with editsemiprotected' => [
 				true,
@@ -548,20 +549,20 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 				true,
 				[ (object)[ 'pr_type' => 'edit', 'pr_level' => 'editsemiprotected',
 						'pr_expiry' => 'infinity', 'pr_cascade' => '0' ] ],
-				[ 'SemiprotectedRestrictionLevels' => [ 'editsemiprotected' ] ],
+				[ MainConfigNames::SemiprotectedRestrictionLevels => [ 'editsemiprotected' ] ],
 			],
 			'Semiprotection plus other protection level' => [
 				false,
 				[ (object)[ 'pr_type' => 'edit', 'pr_level' => 'autoconfirmed,superman',
 						'pr_expiry' => 'infinity', 'pr_cascade' => '0' ] ],
-				[ 'RestrictionLevels' => [ '', 'autoconfirmed', 'sysop', 'superman' ] ],
+				[ MainConfigNames::RestrictionLevels => [ '', 'autoconfirmed', 'sysop', 'superman' ] ],
 			],
 			'Two semiprotections' => [
 				true,
 				[ (object)[ 'pr_type' => 'edit', 'pr_level' => 'autoconfirmed,superman',
 						'pr_expiry' => 'infinity', 'pr_cascade' => '0' ] ],
-				[ 'RestrictionLevels' => [ '', 'autoconfirmed', 'sysop', 'superman' ],
-					'SemiprotectedRestrictionLevels' => [ 'autoconfirmed', 'superman' ] ],
+				[ MainConfigNames::RestrictionLevels => [ '', 'autoconfirmed', 'sysop', 'superman' ],
+					MainConfigNames::SemiprotectedRestrictionLevels => [ 'autoconfirmed', 'superman' ] ],
 			],
 		];
 	}
@@ -631,7 +632,7 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 				true,
 				[ (object)[ 'pr_type' => 'custom', 'pr_level' => 'sysop',
 					'pr_expiry' => 'infinity', 'pr_cascade' => '0' ], ],
-				[ 'action' => 'custom', 'RestrictionTypes' =>
+				[ 'action' => 'custom', MainConfigNames::RestrictionTypes =>
 					array_merge( self::DEFAULT_RESTRICTION_TYPES, [ 'custom' ] ) ],
 			],
 			'Check custom protection level' => [
@@ -732,48 +733,48 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 			'Nonexistent page with no create' => [
 				[],
 				PageIdentityValue::localIdentity( 0, NS_MAIN, 'X' ),
-				[ 'RestrictionTypes' => [ 'edit', 'move', 'upload' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'edit', 'move', 'upload' ] ],
 			],
 			'Existing page with no move' => [
 				[ 'edit' ],
 				PageIdentityValue::localIdentity( 1, NS_MAIN, 'X' ),
-				[ 'RestrictionTypes' => [ 'create', 'edit', 'upload' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create', 'edit', 'upload' ] ],
 			],
 			'Nonexistent file with no upload' => [
 				[ 'create' ],
 				PageIdentityValue::localIdentity( 0, NS_FILE, 'X' ),
-				[ 'RestrictionTypes' => [ 'create', 'edit', 'move' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create', 'edit', 'move' ] ],
 			],
 
 			'Special page with extra type' => [
 				[],
 				self::newImproperPageIdentity( NS_SPECIAL, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Media page with extra type' => [
 				[],
 				self::newImproperPageIdentity( NS_MEDIA, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Nonexistent page with extra type' => [
 				[ 'create' ],
 				PageIdentityValue::localIdentity( 0, NS_MAIN, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Existing page with extra type' => [
 				[ 'edit', 'move', 'liquify' ],
 				PageIdentityValue::localIdentity( 1, NS_MAIN, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Nonexistent file with extra type' => [
 				[ 'create', 'upload' ],
 				PageIdentityValue::localIdentity( 0, NS_FILE, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Existing file with extra type' => [
 				[ 'edit', 'move', 'upload', 'liquify' ],
 				PageIdentityValue::localIdentity( 1, NS_FILE, 'X' ),
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 
 			'Hook' => [
@@ -827,43 +828,43 @@ class RestrictionStoreTest extends MediaWikiUnitTestCase {
 			'Exists with extra restriction type' => [
 				[ 'edit', 'move', 'upload', 'solidify' ],
 				[ true ],
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Default is exists with extra restriction type' => [
 				[ 'edit', 'move', 'upload', 'solidify' ],
 				[],
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 			'Nonexistent with extra restriction type' => [
 				[ 'create', 'upload' ],
 				[ false ],
-				[ 'RestrictionTypes' => $expandedRestrictions ],
+				[ MainConfigNames::RestrictionTypes => $expandedRestrictions ],
 			],
 
 			'Exists with no edit' => [
 				[ 'move', 'upload' ],
 				[ true ],
-				[ 'RestrictionTypes' => [ 'create', 'move', 'upload' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create', 'move', 'upload' ] ],
 			],
 			'Exists with only create' => [
 				[],
 				[ true ],
-				[ 'RestrictionTypes' => [ 'create' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create' ] ],
 			],
 			'Nonexistent with no create' => [
 				[ 'upload' ],
 				[ false ],
-				[ 'RestrictionTypes' => [ 'edit', 'move', 'upload', 'solidify' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'edit', 'move', 'upload', 'solidify' ] ],
 			],
 			'Nonexistent with no upload' => [
 				[ 'create' ],
 				[ false ],
-				[ 'RestrictionTypes' => [ 'create', 'edit', 'move', 'solidify' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'create', 'edit', 'move', 'solidify' ] ],
 			],
 			'Nonexistent with no create or upload' => [
 				[],
 				[ false ],
-				[ 'RestrictionTypes' => [ 'edit', 'move', 'solidify' ] ],
+				[ MainConfigNames::RestrictionTypes => [ 'edit', 'move', 'solidify' ] ],
 			],
 		];
 	}
diff --git a/tests/phpunit/unit/includes/PingbackTest.php b/tests/phpunit/unit/includes/PingbackTest.php
index 0af29ef0bf1f..a39877043202 100644
--- a/tests/phpunit/unit/includes/PingbackTest.php
+++ b/tests/phpunit/unit/includes/PingbackTest.php
@@ -1,6 +1,7 @@
 <?php
 
 use MediaWiki\Http\HttpRequestFactory;
+use MediaWiki\MainConfigNames;
 use Psr\Log\NullLogger;
 use Wikimedia\Rdbms\DBConnRef;
 use Wikimedia\Rdbms\ILoadBalancer;
@@ -32,7 +33,7 @@ class PingbackTest extends MediaWikiUnitTestCase {
 		$loadBalancer->method( 'getConnectionRef' )->willReturn( $database );
 
 		$pingback = new MockPingback(
-			new HashConfig( [ 'Pingback' => $enablePingback ] ),
+			new HashConfig( [ MainConfigNames::Pingback => $enablePingback ] ),
 			$loadBalancer,
 			$cache ?? new HashBagOStuff(),
 			$httpRequestFactory,
diff --git a/tests/phpunit/unit/includes/Rest/CorsUtilsTest.php b/tests/phpunit/unit/includes/Rest/CorsUtilsTest.php
index 680d6cbb1147..2eba788ed0b7 100644
--- a/tests/phpunit/unit/includes/Rest/CorsUtilsTest.php
+++ b/tests/phpunit/unit/includes/Rest/CorsUtilsTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\Rest;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Rest\CorsUtils;
 use MediaWiki\Rest\Handler;
 use MediaWiki\Rest\RequestInterface;
@@ -18,12 +19,12 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 
 	private function createServiceOptions( array $options = [] ) {
 		$defaults = [
-			'AllowedCorsHeaders' => [],
-			'AllowCrossOrigin' => false,
-			'RestAllowCrossOriginCookieAuth' => false,
-			'CanonicalServer' => 'https://example.com',
-			'CrossSiteAJAXdomains' => [],
-			'CrossSiteAJAXdomainExceptions' => [],
+			MainConfigNames::AllowedCorsHeaders => [],
+			MainConfigNames::AllowCrossOrigin => false,
+			MainConfigNames::RestAllowCrossOriginCookieAuth => false,
+			MainConfigNames::CanonicalServer => 'https://example.com',
+			MainConfigNames::CrossSiteAJAXdomains => [],
+			MainConfigNames::CrossSiteAJAXdomainExceptions => [],
 		];
 
 		return new ServiceOptions( CorsUtils::CONSTRUCTOR_OPTIONS, array_merge( $defaults, $options ) );
@@ -35,7 +36,7 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 	public function testAuthorizeAllowOrigin( bool $isRegistered, bool $needsWriteAccess, string $origin ) {
 		$cors = new CorsUtils(
 			$this->createServiceOptions( [
-				'CrossSiteAJAXdomains' => [
+				MainConfigNames::CrossSiteAJAXdomains => [
 					'www.mediawiki.org',
 				],
 			] ),
@@ -147,7 +148,7 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 	public function testModifyResponseAllowOrigin() {
 		$cors = new CorsUtils(
 			$this->createServiceOptions( [
-				'AllowCrossOrigin' => true,
+				MainConfigNames::AllowCrossOrigin => true,
 			] ),
 			$this->createNoOpMock( ResponseFactory::class ),
 			new UserIdentityValue( 0, __CLASS__ )
@@ -174,8 +175,8 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 	public function testModifyResponseAllowTrustedOriginCookieAuth( string $requestMethod, bool $isRegistered ) {
 		$cors = new CorsUtils(
 			$this->createServiceOptions( [
-				'AllowCrossOrigin' => true,
-				'RestAllowCrossOriginCookieAuth' => true,
+				MainConfigNames::AllowCrossOrigin => true,
+				MainConfigNames::RestAllowCrossOriginCookieAuth => true,
 			] ),
 			$this->createNoOpMock( ResponseFactory::class ),
 			new UserIdentityValue( (int)$isRegistered, __CLASS__ )
@@ -229,8 +230,8 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 	) {
 		$cors = new CorsUtils(
 			$this->createServiceOptions( [
-				'AllowCrossOrigin' => true,
-				'RestAllowCrossOriginCookieAuth' => true,
+				MainConfigNames::AllowCrossOrigin => true,
+				MainConfigNames::RestAllowCrossOriginCookieAuth => true,
 			] ),
 			$this->createNoOpMock( ResponseFactory::class ),
 			new UserIdentityValue( (int)$isRegistered, __CLASS__ )
@@ -307,7 +308,7 @@ class CorsUtilsTest extends \MediaWikiUnitTestCase {
 
 		$cors = new CorsUtils(
 			$this->createServiceOptions( [
-				'AllowedCorsHeaders' => [ 'Authorization', 'BlaHeader', ],
+				MainConfigNames::AllowedCorsHeaders => [ 'Authorization', 'BlaHeader', ],
 			] ),
 			$responseFactory,
 			new UserIdentityValue( 0, __CLASS__ )
diff --git a/tests/phpunit/unit/includes/Rest/Handler/SearchHandlerTest.php b/tests/phpunit/unit/includes/Rest/Handler/SearchHandlerTest.php
index 6858e321ddb3..513f0ae853fb 100644
--- a/tests/phpunit/unit/includes/Rest/Handler/SearchHandlerTest.php
+++ b/tests/phpunit/unit/includes/Rest/Handler/SearchHandlerTest.php
@@ -6,6 +6,7 @@ use HashConfig;
 use InvalidArgumentException;
 use Language;
 use MediaWiki\Linker\LinkTarget;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\PageIdentity;
 use MediaWiki\Page\PageIdentityValue;
 use MediaWiki\Page\PageStore;
@@ -69,10 +70,10 @@ class SearchHandlerTest extends \MediaWikiUnitTestCase {
 		$mockTitleFormatter = null
 	) {
 		$config = new HashConfig( [
-			'SearchType' => 'test',
-			'SearchTypeAlternatives' => [],
-			'NamespacesToBeSearchedDefault' => [ NS_MAIN => true ],
-			'SearchSuggestCacheExpiry' => 1200,
+			MainConfigNames::SearchType => 'test',
+			MainConfigNames::SearchTypeAlternatives => [],
+			MainConfigNames::NamespacesToBeSearchedDefault => [ NS_MAIN => true ],
+			MainConfigNames::SearchSuggestCacheExpiry => 1200,
 		] );
 
 		/** @var Language|MockObject $language */
diff --git a/tests/phpunit/unit/includes/Storage/BlobStoreFactoryTest.php b/tests/phpunit/unit/includes/Storage/BlobStoreFactoryTest.php
index cbe8b2e2a564..5fe414d92537 100644
--- a/tests/phpunit/unit/includes/Storage/BlobStoreFactoryTest.php
+++ b/tests/phpunit/unit/includes/Storage/BlobStoreFactoryTest.php
@@ -4,6 +4,7 @@ namespace MediaWiki\Tests\Storage\Unit;
 
 use ExternalStoreAccess;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Storage\BlobStore;
 use MediaWiki\Storage\BlobStoreFactory;
 use MediaWiki\Storage\SqlBlobStore;
@@ -22,10 +23,10 @@ class BlobStoreFactoryTest extends MediaWikiUnitTestCase {
 		$lbFactory = $this->createMock( ILBFactory::class );
 		$lbFactory->method( 'getMainLB' )->willReturn( $this->createMock( ILoadBalancer::class ) );
 		$options = [
-			'CompressRevisions' => false,
-			'DefaultExternalStore' => false,
-			'LegacyEncoding' => false,
-			'RevisionCacheExpiry' => 86400 * 7,
+			MainConfigNames::CompressRevisions => false,
+			MainConfigNames::DefaultExternalStore => false,
+			MainConfigNames::LegacyEncoding => false,
+			MainConfigNames::RevisionCacheExpiry => 86400 * 7,
 		];
 		return new BlobStoreFactory(
 			$lbFactory,
diff --git a/tests/phpunit/unit/includes/Storage/EditResultBuilderTest.php b/tests/phpunit/unit/includes/Storage/EditResultBuilderTest.php
index 4396a99b4012..0efec8ac6be0 100644
--- a/tests/phpunit/unit/includes/Storage/EditResultBuilderTest.php
+++ b/tests/phpunit/unit/includes/Storage/EditResultBuilderTest.php
@@ -4,6 +4,7 @@ namespace MediaWiki\Tests\Storage;
 
 use DummyContentForTesting;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Revision\MutableRevisionRecord;
 use MediaWiki\Revision\RevisionRecord;
 use MediaWiki\Revision\RevisionStore;
@@ -377,7 +378,7 @@ class EditResultBuilderTest extends MediaWikiUnitTestCase {
 
 		$options = new ServiceOptions(
 			EditResultBuilder::CONSTRUCTOR_OPTIONS,
-			[ 'ManualRevertSearchRadius' => $manualRevertSearchRadius ]
+			[ MainConfigNames::ManualRevertSearchRadius => $manualRevertSearchRadius ]
 		);
 
 		return new EditResultBuilder(
diff --git a/tests/phpunit/unit/includes/Storage/EditResultCacheTest.php b/tests/phpunit/unit/includes/Storage/EditResultCacheTest.php
index 3a30c0681fde..0f8726223fef 100644
--- a/tests/phpunit/unit/includes/Storage/EditResultCacheTest.php
+++ b/tests/phpunit/unit/includes/Storage/EditResultCacheTest.php
@@ -5,6 +5,7 @@ namespace MediaWiki\Tests\Storage;
 use BagOStuff;
 use FormatJson;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Storage\EditResult;
 use MediaWiki\Storage\EditResultCache;
 use MediaWikiUnitTestCase;
@@ -59,7 +60,7 @@ class EditResultCacheTest extends MediaWikiUnitTestCase {
 			$this->createNoOpMock( ILoadBalancer::class ),
 			new ServiceOptions(
 				EditResultCache::CONSTRUCTOR_OPTIONS,
-				[ 'RCMaxAge' => BagOStuff::TTL_MONTH ]
+				[ MainConfigNames::RCMaxAge => BagOStuff::TTL_MONTH ]
 			)
 		);
 
@@ -87,7 +88,7 @@ class EditResultCacheTest extends MediaWikiUnitTestCase {
 			$this->createNoOpMock( ILoadBalancer::class ),
 			new ServiceOptions(
 				EditResultCache::CONSTRUCTOR_OPTIONS,
-				[ 'RCMaxAge' => BagOStuff::TTL_MONTH ]
+				[ MainConfigNames::RCMaxAge => BagOStuff::TTL_MONTH ]
 			)
 		);
 		$res = $erCache->get( 126 );
@@ -124,7 +125,7 @@ class EditResultCacheTest extends MediaWikiUnitTestCase {
 			$loadBalancer,
 			new ServiceOptions(
 				EditResultCache::CONSTRUCTOR_OPTIONS,
-				[ 'RCMaxAge' => BagOStuff::TTL_MONTH ]
+				[ MainConfigNames::RCMaxAge => BagOStuff::TTL_MONTH ]
 			)
 		);
 		$res = $erCache->get( 126 );
@@ -159,7 +160,7 @@ class EditResultCacheTest extends MediaWikiUnitTestCase {
 			$loadBalancer,
 			new ServiceOptions(
 				EditResultCache::CONSTRUCTOR_OPTIONS,
-				[ 'RCMaxAge' => BagOStuff::TTL_MONTH ]
+				[ MainConfigNames::RCMaxAge => BagOStuff::TTL_MONTH ]
 			)
 		);
 		$res = $erCache->get( 126 );
diff --git a/tests/phpunit/unit/includes/Storage/PageUpdaterFactoryTest.php b/tests/phpunit/unit/includes/Storage/PageUpdaterFactoryTest.php
index 014611a74de8..3c82189677d2 100644
--- a/tests/phpunit/unit/includes/Storage/PageUpdaterFactoryTest.php
+++ b/tests/phpunit/unit/includes/Storage/PageUpdaterFactoryTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\Unit\Storage;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\WikiPageFactory;
 use MediaWiki\Storage\DerivedPageDataUpdater;
 use MediaWiki\Storage\PageUpdater;
@@ -22,13 +23,13 @@ class PageUpdaterFactoryTest extends MediaWikiUnitTestCase {
 
 	private function getPageUpdaterFactory() {
 		$config = [
-			'ArticleCountMethod' => null,
-			'RCWatchCategoryMembership' => null,
-			'PageCreationLog' => null,
-			'UseAutomaticEditSummaries' => null,
-			'ManualRevertSearchRadius' => null,
-			'UseRCPatrol' => null,
-			'ParsoidCacheConfig' => [
+			MainConfigNames::ArticleCountMethod => null,
+			MainConfigNames::RCWatchCategoryMembership => null,
+			MainConfigNames::PageCreationLog => null,
+			MainConfigNames::UseAutomaticEditSummaries => null,
+			MainConfigNames::ManualRevertSearchRadius => null,
+			MainConfigNames::UseRCPatrol => null,
+			MainConfigNames::ParsoidCacheConfig => [
 				'WarmParsoidParserCache' => false
 			],
 		];
diff --git a/tests/phpunit/unit/includes/Storage/RevertedTagUpdateTest.php b/tests/phpunit/unit/includes/Storage/RevertedTagUpdateTest.php
index a5b75a4fa82d..f60481694d88 100644
--- a/tests/phpunit/unit/includes/Storage/RevertedTagUpdateTest.php
+++ b/tests/phpunit/unit/includes/Storage/RevertedTagUpdateTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\Storage;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Revision\MutableRevisionRecord;
 use MediaWiki\Revision\RevisionRecord;
 use MediaWiki\Revision\RevisionStore;
@@ -76,7 +77,7 @@ class RevertedTagUpdateTest extends MediaWikiUnitTestCase {
 			) {
 				$serviceOptions = new ServiceOptions(
 					RevertedTagUpdate::CONSTRUCTOR_OPTIONS,
-					[ 'RevertedTagMaxDepth' => $revertedTagMaxDepth ]
+					[ MainConfigNames::RevertedTagMaxDepth => $revertedTagMaxDepth ]
 				);
 
 				parent::__construct(
diff --git a/tests/phpunit/unit/includes/block/BlockPermissionCheckerTest.php b/tests/phpunit/unit/includes/block/BlockPermissionCheckerTest.php
index d8dd98b5f823..08b1e859121e 100644
--- a/tests/phpunit/unit/includes/block/BlockPermissionCheckerTest.php
+++ b/tests/phpunit/unit/includes/block/BlockPermissionCheckerTest.php
@@ -5,6 +5,7 @@ use MediaWiki\Block\BlockPermissionChecker;
 use MediaWiki\Block\BlockUtils;
 use MediaWiki\Block\DatabaseBlock;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Permissions\Authority;
 use MediaWiki\Tests\Unit\Permissions\MockAuthorityTrait;
 use MediaWiki\User\UserIdentity;
@@ -32,7 +33,7 @@ class BlockPermissionCheckerTest extends MediaWikiUnitTestCase {
 	) {
 		$options = new ServiceOptions(
 			BlockPermissionChecker::CONSTRUCTOR_OPTIONS,
-			[ 'EnableUserEmail' => $enableUserEmail ]
+			[ MainConfigNames::EnableUserEmail => $enableUserEmail ]
 		);
 
 		// We don't care about how BlockUtils::parseBlockTarget actually works, just
diff --git a/tests/phpunit/unit/includes/block/BlockUtilsTest.php b/tests/phpunit/unit/includes/block/BlockUtilsTest.php
index 7e2554f4d94f..8456960f948c 100644
--- a/tests/phpunit/unit/includes/block/BlockUtilsTest.php
+++ b/tests/phpunit/unit/includes/block/BlockUtilsTest.php
@@ -3,6 +3,7 @@
 use MediaWiki\Block\AbstractBlock;
 use MediaWiki\Block\BlockUtils;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Tests\Unit\DummyServicesTrait;
 use MediaWiki\User\UserIdentity;
 use MediaWiki\User\UserIdentityLookup;
@@ -28,7 +29,7 @@ class BlockUtilsTest extends MediaWikiUnitTestCase {
 		UserIdentityLookup $userIdentityLookup = null
 	) {
 		$baseOptions = [
-			'BlockCIDRLimit' => [
+			MainConfigNames::BlockCIDRLimit => [
 				'IPv4' => 16,
 				'IPv6' => 19
 			]
diff --git a/tests/phpunit/unit/includes/editpage/Constraint/EditConstraintFactoryTest.php b/tests/phpunit/unit/includes/editpage/Constraint/EditConstraintFactoryTest.php
index b0e258a01893..0cc2ee135a2a 100644
--- a/tests/phpunit/unit/includes/editpage/Constraint/EditConstraintFactoryTest.php
+++ b/tests/phpunit/unit/includes/editpage/Constraint/EditConstraintFactoryTest.php
@@ -29,6 +29,7 @@ use MediaWiki\EditPage\Constraint\UserBlockConstraint;
 use MediaWiki\EditPage\SpamChecker;
 use MediaWiki\HookContainer\HookContainer;
 use MediaWiki\Logger\Spi;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Permissions\PermissionManager;
 use Psr\Log\NullLogger;
 
@@ -44,7 +45,7 @@ class EditConstraintFactoryTest extends MediaWikiUnitTestCase {
 	public function testFactoryMethods() {
 		$options = new ServiceOptions(
 			EditConstraintFactory::CONSTRUCTOR_OPTIONS,
-			[ 'MaxArticleSize' => 10 ]
+			[ MainConfigNames::MaxArticleSize => 10 ]
 		);
 		$loggerFactory = $this->createMock( Spi::class );
 		$loggerFactory->method( 'getLogger' )
diff --git a/tests/phpunit/unit/includes/filebackend/FileBackendGroupTestTrait.php b/tests/phpunit/unit/includes/filebackend/FileBackendGroupTestTrait.php
index a0c822f63e1a..f0f4bf881183 100644
--- a/tests/phpunit/unit/includes/filebackend/FileBackendGroupTestTrait.php
+++ b/tests/phpunit/unit/includes/filebackend/FileBackendGroupTestTrait.php
@@ -3,6 +3,7 @@
 use MediaWiki\FileBackend\FSFile\TempFSFileFactory;
 use MediaWiki\FileBackend\LockManager\LockManagerGroupFactory;
 use MediaWiki\Logger\LoggerFactory;
+use MediaWiki\MainConfigNames;
 use Wikimedia\TestingAccessWrapper;
 
 /**
@@ -71,10 +72,10 @@ trait FileBackendGroupTestTrait {
 
 	private static function getDefaultOptions() {
 		return [
-			'DirectoryMode' => 0775,
-			'FileBackends' => [],
-			'ForeignFileRepos' => [],
-			'LocalFileRepo' => self::getDefaultLocalFileRepo(),
+			MainConfigNames::DirectoryMode => 0775,
+			MainConfigNames::FileBackends => [],
+			MainConfigNames::ForeignFileRepos => [],
+			MainConfigNames::LocalFileRepo => self::getDefaultLocalFileRepo(),
 			'fallbackWikiId' => self::getWikiID(),
 		];
 	}
@@ -83,7 +84,7 @@ trait FileBackendGroupTestTrait {
 	 * @covers ::__construct
 	 */
 	public function testConstructor_overrideImplicitBackend() {
-		$obj = $this->newObj( [ 'FileBackends' =>
+		$obj = $this->newObj( [ MainConfigNames::FileBackends =>
 			[ [ 'name' => 'local-backend', 'class' => '', 'lockManager' => 'fsLockManager' ] ]
 		] );
 		$this->assertSame( '', $obj->config( 'local-backend' )['class'] );
@@ -95,7 +96,7 @@ trait FileBackendGroupTestTrait {
 	public function testConstructor_backendObject() {
 		// 'backend' being an object makes that repo from configuration ignored
 		// XXX This is not documented in MainConfigSchema, does it do anything useful?
-		$obj = $this->newObj( [ 'ForeignFileRepos' => [ [ 'backend' => (object)[] ] ] ] );
+		$obj = $this->newObj( [ MainConfigNames::ForeignFileRepos => [ [ 'backend' => (object)[] ] ] ] );
 		$this->assertSame( FSFileBackend::class, $obj->config( 'local-backend' )['class'] );
 	}
 
@@ -119,7 +120,7 @@ trait FileBackendGroupTestTrait {
 			$otherExtraOptions['lmgFactory'] = $this->getLockManagerGroupFactory( $expected );
 		}
 		$obj = $this->newObj( $otherExtraOptions + [
-			'FileBackends' => [
+			MainConfigNames::FileBackends => [
 				$extraBackendsOptions + [
 					'name' => 'myname', 'class' => '', 'lockManager' => 'fsLockManager'
 				]
@@ -169,7 +170,7 @@ trait FileBackendGroupTestTrait {
 	public function testRegister_exception( $fileBackends, $class, $msg ) {
 		$this->expectException( $class );
 		$this->expectExceptionMessage( $msg );
-		$this->newObj( [ 'FileBackends' => $fileBackends ] );
+		$this->newObj( [ MainConfigNames::FileBackends => $fileBackends ] );
 	}
 
 	public static function provideRegister_exception() {
@@ -278,7 +279,7 @@ trait FileBackendGroupTestTrait {
 		$config = self::getDefaultLocalFileRepo();
 		$config[$inputName] = null;
 
-		$result = $this->newObj( [ 'LocalFileRepo' => $config ] )->config( 'local-backend' );
+		$result = $this->newObj( [ MainConfigNames::LocalFileRepo => $config ] )->config( 'local-backend' );
 
 		$actual = is_string( $key ) ? $result[$key] : $result[$key[0]][$key[1]];
 
@@ -298,7 +299,7 @@ trait FileBackendGroupTestTrait {
 		$config = self::getDefaultLocalFileRepo();
 		unset( $config[$inputName] );
 
-		$result = $this->newObj( [ 'LocalFileRepo' => $config ] )->config( 'local-backend' );
+		$result = $this->newObj( [ MainConfigNames::LocalFileRepo => $config ] )->config( 'local-backend' );
 
 		$actual = is_string( $key ) ? $result[$key] : $result[$key[0]][$key[1]];
 
@@ -332,7 +333,7 @@ trait FileBackendGroupTestTrait {
 	 * @param string $storagePath
 	 */
 	public function testBackendFromPath( $expected, $storagePath ) {
-		$obj = $this->newObj( [ 'FileBackends' => [
+		$obj = $this->newObj( [ MainConfigNames::FileBackends => [
 			[ 'name' => '', 'class' => stdClass::class, 'lockManager' => 'fsLockManager' ],
 			[ 'name' => 'a', 'class' => stdClass::class, 'lockManager' => 'fsLockManager' ],
 			[ 'name' => 'b', 'class' => stdClass::class, 'lockManager' => 'fsLockManager' ],
diff --git a/tests/phpunit/unit/includes/http/HttpRequestFactoryTest.php b/tests/phpunit/unit/includes/http/HttpRequestFactoryTest.php
index 969175360937..ee9d0baf1841 100644
--- a/tests/phpunit/unit/includes/http/HttpRequestFactoryTest.php
+++ b/tests/phpunit/unit/includes/http/HttpRequestFactoryTest.php
@@ -2,6 +2,7 @@
 
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\Http\HttpRequestFactory;
+use MediaWiki\MainConfigNames;
 use Psr\Log\NullLogger;
 use Wikimedia\TestingAccessWrapper;
 
@@ -17,15 +18,15 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 	private function newFactory( $options = null ) {
 		if ( !$options ) {
 			$options = [
-				'HTTPTimeout' => 1,
-				'HTTPConnectTimeout' => 1,
-				'HTTPMaxTimeout' => INF,
-				'HTTPMaxConnectTimeout' => INF
+				MainConfigNames::HTTPTimeout => 1,
+				MainConfigNames::HTTPConnectTimeout => 1,
+				MainConfigNames::HTTPMaxTimeout => INF,
+				MainConfigNames::HTTPMaxConnectTimeout => INF
 			];
 		}
 		$options += [
-			'LocalVirtualHosts' => [],
-			'LocalHTTPProxy' => false,
+			MainConfigNames::LocalVirtualHosts => [],
+			MainConfigNames::LocalHTTPProxy => false,
 		];
 		return new HttpRequestFactory(
 			new ServiceOptions( HttpRequestFactory::CONSTRUCTOR_OPTIONS, $options ),
@@ -148,10 +149,10 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 		return [
 			'normal config defaults' => [
 				[
-					'HTTPTimeout' => 10,
-					'HTTPConnectTimeout' => 20,
-					'HTTPMaxTimeout' => INF,
-					'HTTPMaxConnectTimeout' => INF
+					MainConfigNames::HTTPTimeout => 10,
+					MainConfigNames::HTTPConnectTimeout => 20,
+					MainConfigNames::HTTPMaxTimeout => INF,
+					MainConfigNames::HTTPMaxConnectTimeout => INF
 				],
 				[],
 				[
@@ -161,10 +162,10 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 			],
 			'config defaults overridden by max' => [
 				[
-					'HTTPTimeout' => 10,
-					'HTTPConnectTimeout' => 20,
-					'HTTPMaxTimeout' => 9,
-					'HTTPMaxConnectTimeout' => 11
+					MainConfigNames::HTTPTimeout => 10,
+					MainConfigNames::HTTPConnectTimeout => 20,
+					MainConfigNames::HTTPMaxTimeout => 9,
+					MainConfigNames::HTTPMaxConnectTimeout => 11
 				],
 				[],
 				[
@@ -174,10 +175,10 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 			],
 			'create option overridden by max config' => [
 				[
-					'HTTPTimeout' => 1,
-					'HTTPConnectTimeout' => 2,
-					'HTTPMaxTimeout' => 9,
-					'HTTPMaxConnectTimeout' => 11
+					MainConfigNames::HTTPTimeout => 1,
+					MainConfigNames::HTTPConnectTimeout => 2,
+					MainConfigNames::HTTPMaxTimeout => 9,
+					MainConfigNames::HTTPMaxConnectTimeout => 11
 				],
 				[
 					'timeout' => 100,
@@ -190,10 +191,10 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 			],
 			'create option below max config' => [
 				[
-					'HTTPTimeout' => 1,
-					'HTTPConnectTimeout' => 2,
-					'HTTPMaxTimeout' => 9,
-					'HTTPMaxConnectTimeout' => 11
+					MainConfigNames::HTTPTimeout => 1,
+					MainConfigNames::HTTPConnectTimeout => 2,
+					MainConfigNames::HTTPMaxTimeout => 9,
+					MainConfigNames::HTTPMaxConnectTimeout => 11
 				],
 				[
 					'timeout' => 7,
@@ -206,10 +207,10 @@ class HttpRequestFactoryTest extends MediaWikiUnitTestCase {
 			],
 			'max config overridden by max create option ' => [
 				[
-					'HTTPTimeout' => 1,
-					'HTTPConnectTimeout' => 2,
-					'HTTPMaxTimeout' => 9,
-					'HTTPMaxConnectTimeout' => 11
+					MainConfigNames::HTTPTimeout => 1,
+					MainConfigNames::HTTPConnectTimeout => 2,
+					MainConfigNames::HTTPMaxTimeout => 9,
+					MainConfigNames::HTTPMaxConnectTimeout => 11
 				],
 				[
 					'timeout' => 100,
diff --git a/tests/phpunit/unit/includes/jobqueue/JobQueueGroupFactoryTest.php b/tests/phpunit/unit/includes/jobqueue/JobQueueGroupFactoryTest.php
index cc94abad3ebf..a573c8f509b4 100644
--- a/tests/phpunit/unit/includes/jobqueue/JobQueueGroupFactoryTest.php
+++ b/tests/phpunit/unit/includes/jobqueue/JobQueueGroupFactoryTest.php
@@ -2,6 +2,7 @@
 
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\JobQueue\JobQueueGroupFactory;
+use MediaWiki\MainConfigNames;
 use Wikimedia\UUID\GlobalIdGenerator;
 
 /**
@@ -13,10 +14,10 @@ class JobQueueGroupFactoryTest extends MediaWikiUnitTestCase {
 			new ServiceOptions(
 				JobQueueGroupFactory::CONSTRUCTOR_OPTIONS,
 				new HashConfig( [
-					'LocalDatabases' => [],
-					'JobClasses' => [],
-					'JobTypeConf' => [],
-					'JobTypesExcludedFromDefaultQueue' => []
+					MainConfigNames::LocalDatabases => [],
+					MainConfigNames::JobClasses => [],
+					MainConfigNames::JobTypeConf => [],
+					MainConfigNames::JobTypesExcludedFromDefaultQueue => []
 				] )
 			),
 			$this->createMock( ConfiguredReadOnlyMode::class ),
diff --git a/tests/phpunit/unit/includes/language/LanguageNameUtilsTest.php b/tests/phpunit/unit/includes/language/LanguageNameUtilsTest.php
index 273b6d0bc6f5..5c82176ae8da 100644
--- a/tests/phpunit/unit/includes/language/LanguageNameUtilsTest.php
+++ b/tests/phpunit/unit/includes/language/LanguageNameUtilsTest.php
@@ -3,6 +3,7 @@
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\HookContainer\HookContainer;
 use MediaWiki\Languages\LanguageNameUtils;
+use MediaWiki\MainConfigNames;
 
 class LanguageNameUtilsTest extends MediaWikiUnitTestCase {
 	use LanguageNameUtilsTestTrait;
@@ -27,9 +28,9 @@ class LanguageNameUtilsTest extends MediaWikiUnitTestCase {
 				LanguageNameUtils::CONSTRUCTOR_OPTIONS,
 				$optionsArray,
 				[
-					'ExtraLanguageNames' => [],
-					'LanguageCode' => 'en',
-					'UsePigLatinVariant' => false,
+					MainConfigNames::ExtraLanguageNames => [],
+					MainConfigNames::LanguageCode => 'en',
+					MainConfigNames::UsePigLatinVariant => false,
 				]
 			),
 			$this->hookContainer
diff --git a/tests/phpunit/unit/includes/language/LanguageNameUtilsTestTrait.php b/tests/phpunit/unit/includes/language/LanguageNameUtilsTestTrait.php
index 1a1d4433a528..ddbcd0cb7eed 100644
--- a/tests/phpunit/unit/includes/language/LanguageNameUtilsTestTrait.php
+++ b/tests/phpunit/unit/includes/language/LanguageNameUtilsTestTrait.php
@@ -3,6 +3,7 @@
 // phpcs:disable MediaWiki.Commenting.FunctionComment.MissingParamTag -- Traits are not excluded
 
 use MediaWiki\Languages\LanguageNameUtils;
+use MediaWiki\MainConfigNames;
 
 const AUTONYMS = LanguageNameUtils::AUTONYMS;
 const ALL = LanguageNameUtils::ALL;
@@ -267,7 +268,7 @@ trait LanguageNameUtilsTestTrait {
 			}
 		);
 		$this->assertGetLanguageNames(
-			[ 'ExtraLanguageNames' => [ 'de' => 'deutsche Sprache', 'sqsqsqsq' => '!!?!' ] ],
+			[ MainConfigNames::ExtraLanguageNames => [ 'de' => 'deutsche Sprache', 'sqsqsqsq' => '!!?!' ] ],
 			$expected, $code, ...$otherArgs
 		);
 	}
@@ -381,7 +382,7 @@ trait LanguageNameUtilsTestTrait {
 		);
 
 		$this->assertGetLanguageNames(
-			[ 'UsePigLatinVariant' => true ], $expected, 'en-x-piglatin', ...$otherArgs );
+			[ MainConfigNames::UsePigLatinVariant => true ], $expected, 'en-x-piglatin', ...$otherArgs );
 	}
 
 	public function provideGetLanguageNames_pigLatin() {
@@ -408,8 +409,8 @@ trait LanguageNameUtilsTestTrait {
 	public function testGetLanguageNames_pigLatinAndExtraLanguageNames() {
 		$this->assertGetLanguageNames(
 			[
-				'UsePigLatinVariant' => true,
-				'ExtraLanguageNames' => [ 'en-x-piglatin' => 'igpay atinlay' ]
+				MainConfigNames::UsePigLatinVariant => true,
+				MainConfigNames::ExtraLanguageNames => [ 'en-x-piglatin' => 'igpay atinlay' ]
 			],
 			'Igpay Atinlay',
 			'en-x-piglatin'
diff --git a/tests/phpunit/unit/includes/page/DeletePageTest.php b/tests/phpunit/unit/includes/page/DeletePageTest.php
index a370a4f8b342..d19d328a912d 100644
--- a/tests/phpunit/unit/includes/page/DeletePageTest.php
+++ b/tests/phpunit/unit/includes/page/DeletePageTest.php
@@ -10,6 +10,7 @@ use JobQueueGroup;
 use MediaWiki\Cache\BacklinkCacheFactory;
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\Linker\LinkTarget;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\DeletePage;
 use MediaWiki\Page\PageIdentity;
 use MediaWiki\Page\PageIdentityValue;
@@ -69,8 +70,8 @@ class DeletePageTest extends MediaWikiUnitTestCase {
 		return new ServiceOptions(
 			DeletePage::CONSTRUCTOR_OPTIONS,
 			[
-				'DeleteRevisionsBatchSize' => 100,
-				'DeleteRevisionsLimit' => $deleteLimit
+				MainConfigNames::DeleteRevisionsBatchSize => 100,
+				MainConfigNames::DeleteRevisionsLimit => $deleteLimit
 			]
 		);
 	}
diff --git a/tests/phpunit/unit/includes/page/PageCommandFactoryTest.php b/tests/phpunit/unit/includes/page/PageCommandFactoryTest.php
index 17b39e934336..c98114d804f4 100644
--- a/tests/phpunit/unit/includes/page/PageCommandFactoryTest.php
+++ b/tests/phpunit/unit/includes/page/PageCommandFactoryTest.php
@@ -4,6 +4,7 @@ namespace MediaWiki\Tests\Unit\Page;
 
 use ContentModelChange;
 use HashConfig;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\DeletePage;
 use MediaWiki\Page\PageCommandFactory;
 use MediaWiki\Page\PageIdentity;
@@ -31,16 +32,16 @@ class PageCommandFactoryTest extends MediaWikiUnitTestCase {
 		// Create a PageCommandFactory with all of the services needed
 		$config = new HashConfig( [
 			// RollbackPage
-			'UseRCPatrol' => true,
-			'DisableAnonTalk' => false,
+			MainConfigNames::UseRCPatrol => true,
+			MainConfigNames::DisableAnonTalk => false,
 
 			// MovePage
-			'CategoryCollation' => 'uppercase',
-			'MaximumMovedPages' => 100,
+			MainConfigNames::CategoryCollation => 'uppercase',
+			MainConfigNames::MaximumMovedPages => 100,
 
 			// DeletePage
-			'DeleteRevisionsBatchSize' => 10,
-			'DeleteRevisionsLimit' => 10,
+			MainConfigNames::DeleteRevisionsBatchSize => 10,
+			MainConfigNames::DeleteRevisionsLimit => 10,
 		] );
 
 		// Helper method from MockServiceDependenciesTrait
diff --git a/tests/phpunit/unit/includes/page/PageStoreFactoryTest.php b/tests/phpunit/unit/includes/page/PageStoreFactoryTest.php
index 050ef697c91e..118edc0d2e3d 100644
--- a/tests/phpunit/unit/includes/page/PageStoreFactoryTest.php
+++ b/tests/phpunit/unit/includes/page/PageStoreFactoryTest.php
@@ -4,6 +4,7 @@ namespace MediaWiki\Tests\Page;
 use LinkCache;
 use Liuggio\StatsdClient\Factory\StatsdDataFactoryInterface;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\PageStore;
 use MediaWiki\Page\PageStoreFactory;
 use MediaWikiUnitTestCase;
@@ -19,8 +20,8 @@ class PageStoreFactoryTest extends MediaWikiUnitTestCase {
 
 	public function testGetPageStore() {
 		$options = new ServiceOptions( PageStoreFactory::CONSTRUCTOR_OPTIONS, [
-			'LanguageCode' => 'fi',
-			'PageLanguageUseDB' => true,
+			MainConfigNames::LanguageCode => 'fi',
+			MainConfigNames::PageLanguageUseDB => true,
 		] );
 
 		$lb = $this->createNoOpMock( LoadBalancer::class );
diff --git a/tests/phpunit/unit/includes/parser/ParserCacheFactoryTest.php b/tests/phpunit/unit/includes/parser/ParserCacheFactoryTest.php
index b1e10c0e3960..39512b7022ce 100644
--- a/tests/phpunit/unit/includes/parser/ParserCacheFactoryTest.php
+++ b/tests/phpunit/unit/includes/parser/ParserCacheFactoryTest.php
@@ -2,6 +2,7 @@
 
 use MediaWiki\Config\ServiceOptions;
 use MediaWiki\Json\JsonCodec;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\WikiPageFactory;
 use MediaWiki\Parser\ParserCacheFactory;
 use MediaWiki\Parser\RevisionOutputCache;
@@ -17,8 +18,8 @@ class ParserCacheFactoryTest extends MediaWikiUnitTestCase {
 	 */
 	private function newParserCacheFactory() {
 		$options = new ServiceOptions( ParserCacheFactory::CONSTRUCTOR_OPTIONS, [
-			'CacheEpoch' => '20200202112233',
-			'OldRevisionParserCacheExpireTime' => 60,
+			MainConfigNames::CacheEpoch => '20200202112233',
+			MainConfigNames::OldRevisionParserCacheExpireTime => 60,
 		] );
 
 		return new ParserCacheFactory(
diff --git a/tests/phpunit/unit/includes/parser/Parsoid/Config/SiteConfigTest.php b/tests/phpunit/unit/includes/parser/Parsoid/Config/SiteConfigTest.php
index f5aafb4a9a19..bbb721fd2783 100644
--- a/tests/phpunit/unit/includes/parser/Parsoid/Config/SiteConfigTest.php
+++ b/tests/phpunit/unit/includes/parser/Parsoid/Config/SiteConfigTest.php
@@ -13,6 +13,7 @@ use MediaWiki\Interwiki\InterwikiLookup;
 use MediaWiki\Languages\LanguageConverterFactory;
 use MediaWiki\Languages\LanguageFactory;
 use MediaWiki\Languages\LanguageNameUtils;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Parser\Parsoid\Config\SiteConfig;
 use MediaWiki\SpecialPage\SpecialPageFactory;
 use MediaWiki\User\UserOptionsLookup;
@@ -33,29 +34,29 @@ use ZhConverter;
 class SiteConfigTest extends MediaWikiUnitTestCase {
 
 	private const DEFAULT_CONFIG = [
-		'GalleryOptions' => [],
-		'AllowExternalImages' => false,
-		'AllowExternalImagesFrom' => '',
-		'Server' => 'localhost',
-		'ArticlePath' => false,
-		'InterwikiMagic' => true,
-		'ExtraInterlanguageLinkPrefixes' => [],
-		'LocalInterwikis' => [],
-		'LanguageCode' => 'qqq',
-		'DisableLangConversion' => false,
-		'NamespaceAliases' => [],
-		'UrlProtocols' => [ 'http://' ],
-		'Script' => false,
-		'ScriptPath' => '/wiki',
-		'LoadScript' => false,
-		'LocalTZoffset' => null,
-		'ThumbLimits' => [ 4242 ],
-		'MaxTemplateDepth' => 42,
-		'LegalTitleChars' => 'abc',
-		'NoFollowLinks' => true,
-		'NoFollowNsExceptions' => [ 5 ],
-		'NoFollowDomainExceptions' => [ 'www.mediawiki.org' ],
-		'ExternalLinkTarget' => false,
+		MainConfigNames::GalleryOptions => [],
+		MainConfigNames::AllowExternalImages => false,
+		MainConfigNames::AllowExternalImagesFrom => '',
+		MainConfigNames::Server => 'localhost',
+		MainConfigNames::ArticlePath => false,
+		MainConfigNames::InterwikiMagic => true,
+		MainConfigNames::ExtraInterlanguageLinkPrefixes => [],
+		MainConfigNames::LocalInterwikis => [],
+		MainConfigNames::LanguageCode => 'qqq',
+		MainConfigNames::DisableLangConversion => false,
+		MainConfigNames::NamespaceAliases => [],
+		MainConfigNames::UrlProtocols => [ 'http://' ],
+		MainConfigNames::Script => false,
+		MainConfigNames::ScriptPath => '/wiki',
+		MainConfigNames::LoadScript => false,
+		MainConfigNames::LocalTZoffset => null,
+		MainConfigNames::ThumbLimits => [ 4242 ],
+		MainConfigNames::MaxTemplateDepth => 42,
+		MainConfigNames::LegalTitleChars => 'abc',
+		MainConfigNames::NoFollowLinks => true,
+		MainConfigNames::NoFollowNsExceptions => [ 5 ],
+		MainConfigNames::NoFollowDomainExceptions => [ 'www.mediawiki.org' ],
+		MainConfigNames::ExternalLinkTarget => false,
 	];
 
 	private function createMockOrOverride( string $class, array $overrides ) {
@@ -105,30 +106,30 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 
 	public function provideConfigParameterPassed(): iterable {
 		yield 'galleryOptions' => [
-			[ 'GalleryOptions' => [ 'blabla' ] ],
+			[ MainConfigNames::GalleryOptions => [ 'blabla' ] ],
 			'galleryOptions',
 			[ 'blabla' ]
 		];
 		yield 'allowedExternalImagePrefixes, false' => [
-			[ 'AllowExternalImages' => true ],
+			[ MainConfigNames::AllowExternalImages => true ],
 			'allowedExternalImagePrefixes',
 			[ '' ]
 		];
 		yield 'allowedExternalImagePrefixes, true' => [
 			[
-				'AllowExternalImages' => false,
-				'AllowExternalImagesFrom' => [ 'blabla' ]
+				MainConfigNames::AllowExternalImages => false,
+				MainConfigNames::AllowExternalImagesFrom => [ 'blabla' ]
 			],
 			'allowedExternalImagePrefixes',
 			[ 'blabla' ]
 		];
 		yield 'interwikiMagic' => [
-			[ 'InterwikiMagic' => true ],
+			[ MainConfigNames::InterwikiMagic => true ],
 			'interwikiMagic',
 			true
 		];
 		yield 'lang' => [
-			[ 'LanguageCode' => 'qqx' ],
+			[ MainConfigNames::LanguageCode => 'qqx' ],
 			'lang',
 			'qqx'
 		];
@@ -145,39 +146,39 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 			[ 'enabled' => true, 'threshold' => 10 ]
 		];
 		yield 'script' => [
-			[ 'Script' => 'blabla' ],
+			[ MainConfigNames::Script => 'blabla' ],
 			'script',
 			'blabla'
 		];
 		yield 'scriptpath' => [
-			[ 'ScriptPath' => 'blabla' ],
+			[ MainConfigNames::ScriptPath => 'blabla' ],
 			'scriptpath',
 			'blabla'
 		];
 		yield 'server' => [
-			[ 'Server' => 'blabla' ],
+			[ MainConfigNames::Server => 'blabla' ],
 			'server',
 			'blabla'
 		];
 		yield 'timezoneOffset' => [
-			[ 'LocalTZoffset' => 42 ],
+			[ MainConfigNames::LocalTZoffset => 42 ],
 			'timezoneOffset',
 			42
 		];
 		yield 'getMaxTemplateDepth' => [
-			[ 'MaxTemplateDepth' => 42 ],
+			[ MainConfigNames::MaxTemplateDepth => 42 ],
 			'getMaxTemplateDepth',
 			42
 		];
 		/* $wgLegalTitleChars can't be tested with this mechanism.
 		yield 'legalTitleChars' => [
-			[ 'LegalTitleChars' => 'blabla' ],
+			[ MainConfigNames::LegalTitleChars => 'blabla' ],
 			'legalTitleChars',
 			'blabla'
 		];
 		*/
 		yield 'getProtocols' => [
-			[ 'UrlProtocols' => [ 'blabla' ] ],
+			[ MainConfigNames::UrlProtocols => [ 'blabla' ] ],
 			'getProtocols',
 			[ 'blabla' ]
 		];
@@ -192,7 +193,7 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 			false
 		];
 		yield 'getExternalLinkTargetString' => [
-			[ 'ExternalLinkTarget' => "_blank" ],
+			[ MainConfigNames::ExternalLinkTarget => "_blank" ],
 			'getExternalLinkTarget',
 			"_blank"
 		];
@@ -364,7 +365,7 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 	public function testArticlePath_exception( string $articlePath ) {
 		$this->expectException( UnexpectedValueException::class );
 		$config = $this->createSiteConfig( [
-			'ArticlePath' => $articlePath
+			MainConfigNames::ArticlePath => $articlePath
 		] );
 		$config->baseURI();
 	}
@@ -376,8 +377,8 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 	 */
 	public function testArticlePath_nopath() {
 		$config = $this->createSiteConfig( [
-			'ArticlePath' => '$1',
-			'Server' => 'https://localhost'
+			MainConfigNames::ArticlePath => '$1',
+			MainConfigNames::Server => 'https://localhost'
 		] );
 		$this->assertSame( 'https://localhost/', $config->baseURI() );
 		$this->assertSame( './', $config->relativeLinkPrefix() );
@@ -390,8 +391,8 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 	 */
 	public function testArticlePath() {
 		$config = $this->createSiteConfig( [
-			'ArticlePath' => '/wiki/$1',
-			'Server' => 'https://localhost'
+			MainConfigNames::ArticlePath => '/wiki/$1',
+			MainConfigNames::Server => 'https://localhost'
 		] );
 		$this->assertSame( './', $config->relativeLinkPrefix() );
 		$this->assertSame( 'https://localhost/wiki/', $config->baseURI() );
@@ -501,8 +502,8 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 			->willReturn( false );
 
 		$config = $this->createSiteConfig( [
-			'ExtraInterlanguageLinkPrefixes' => [ 'ru' ],
-			'LocalInterwikis' => [ 'ru' ],
+			MainConfigNames::ExtraInterlanguageLinkPrefixes => [ 'ru' ],
+			MainConfigNames::LocalInterwikis => [ 'ru' ],
 		], [], [
 			InterwikiLookup::class => $interwikiMock,
 			LanguageNameUtils::class => $langNameUtilsMock,
@@ -714,7 +715,7 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 			->with( 'thumbsize' )
 			->willReturn( 'small' );
 		$config = $this->createSiteConfig( [
-			'ThumbLimits' => [ 'small' => 42 ]
+			MainConfigNames::ThumbLimits => [ 'small' => 42 ]
 		], [], [
 			UserOptionsLookup::class => $optionsLookupMock
 		] );
@@ -777,7 +778,7 @@ class SiteConfigTest extends MediaWikiUnitTestCase {
 				'Whatever' => NS_MAIN
 			] );
 		$config = $this->createSiteConfig( [
-			'NamespaceAliases' => [
+			MainConfigNames::NamespaceAliases => [
 				'From Config' => NS_SPECIAL,
 				'Whatever' => NS_MAIN
 			]
diff --git a/tests/phpunit/unit/includes/password/PasswordFactoryTest.php b/tests/phpunit/unit/includes/password/PasswordFactoryTest.php
index a5db1aed8c50..6c5ecdfb4e07 100644
--- a/tests/phpunit/unit/includes/password/PasswordFactoryTest.php
+++ b/tests/phpunit/unit/includes/password/PasswordFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+use MediaWiki\MainConfigNames;
+
 /**
  * @covers PasswordFactory
  */
@@ -44,10 +46,10 @@ class PasswordFactoryTest extends MediaWikiUnitTestCase {
 
 	public function testInit() {
 		$config = new HashConfig( [
-			'PasswordConfig' => [
+			MainConfigNames::PasswordConfig => [
 				'foo' => [ 'class' => InvalidPassword::class ],
 			],
-			'PasswordDefault' => 'foo'
+			MainConfigNames::PasswordDefault => 'foo'
 		] );
 		$pf = new PasswordFactory;
 		$pf->init( $config );
diff --git a/tests/phpunit/unit/includes/skins/components/SkinComponentSearchTest.php b/tests/phpunit/unit/includes/skins/components/SkinComponentSearchTest.php
index ba70281d8e56..105270d586cc 100644
--- a/tests/phpunit/unit/includes/skins/components/SkinComponentSearchTest.php
+++ b/tests/phpunit/unit/includes/skins/components/SkinComponentSearchTest.php
@@ -1,4 +1,5 @@
 <?php
+use MediaWiki\MainConfigNames;
 use MediaWiki\Skin\SkinComponentSearch;
 
 /**
@@ -15,9 +16,9 @@ class SkinComponentSearchTest extends MediaWikiUnitTestCase {
 	 */
 	public function testGetTemplateData() {
 		$config = new HashConfig( [
-			'Script' => '/w/index.php',
-			'CapitalLinks' => true,
-			'WatchlistExpiry' => false,
+			MainConfigNames::Script => '/w/index.php',
+			MainConfigNames::CapitalLinks => true,
+			MainConfigNames::WatchlistExpiry => false,
 		] );
 		$user = new User();
 		$msg = $this->createMock( Message::class );
diff --git a/tests/phpunit/unit/includes/tidy/RemexDriverTest.php b/tests/phpunit/unit/includes/tidy/RemexDriverTest.php
index da142f2fa087..8e62ba99dbcb 100644
--- a/tests/phpunit/unit/includes/tidy/RemexDriverTest.php
+++ b/tests/phpunit/unit/includes/tidy/RemexDriverTest.php
@@ -1,6 +1,7 @@
 <?php
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 
 class RemexDriverTest extends MediaWikiUnitTestCase {
 	private static $remexTidyTestData = [
@@ -353,7 +354,7 @@ MathML;
 		$r = new MediaWiki\Tidy\RemexDriver(
 			new ServiceOptions(
 				MediaWiki\Tidy\RemexDriver::CONSTRUCTOR_OPTIONS,
-				new HashConfig( [ 'TidyConfig' => [] ] )
+				new HashConfig( [ MainConfigNames::TidyConfig => [] ] )
 			)
 		);
 		$result = $r->tidy( $input );
@@ -382,7 +383,7 @@ MathML;
 		$r = new MediaWiki\Tidy\RemexDriver(
 			new ServiceOptions(
 				MediaWiki\Tidy\RemexDriver::CONSTRUCTOR_OPTIONS,
-				new HashConfig( [ 'TidyConfig' => [] ] )
+				new HashConfig( [ MainConfigNames::TidyConfig => [] ] )
 			)
 		);
 		$result = $r->tidy( $input );
diff --git a/tests/phpunit/unit/includes/user/ActorStoreFactoryTest.php b/tests/phpunit/unit/includes/user/ActorStoreFactoryTest.php
index f746e3b70de1..305bc74ec670 100644
--- a/tests/phpunit/unit/includes/user/ActorStoreFactoryTest.php
+++ b/tests/phpunit/unit/includes/user/ActorStoreFactoryTest.php
@@ -3,6 +3,7 @@
 namespace MediaWiki\Tests\User;
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\User\ActorNormalization;
 use MediaWiki\User\ActorStore;
 use MediaWiki\User\ActorStoreFactory;
@@ -25,32 +26,32 @@ class ActorStoreFactoryTest extends MediaWikiUnitTestCase {
 		yield 'local, no shared' => [
 			false, // $domain,
 			[
-				'SharedDB' => false,
-				'SharedTables' => false
+				MainConfigNames::SharedDB => false,
+				MainConfigNames::SharedTables => false
 			], // $config
 			false, // $expectedDomain
 		];
 		yield 'foreign, no shared' => [
 			'acmewiki', // $domain,
 			[
-				'SharedDB' => false,
-				'SharedTables' => false
+				MainConfigNames::SharedDB => false,
+				MainConfigNames::SharedTables => false
 			], //
 			'acmewiki', // $expectedDomain
 		];
 		yield 'local, shared' => [
 			false, // $domain,
 			[
-				'SharedDB' => [ 'sharedwiki' ],
-				'SharedTables' => [ 'user', 'actor' ]
+				MainConfigNames::SharedDB => [ 'sharedwiki' ],
+				MainConfigNames::SharedTables => [ 'user', 'actor' ]
 			], // $config
 			false, // $expectedDomain
 		];
 		yield 'foreign, shared' => [
 			'acmewiki', // $domain,
 			[
-				'SharedDB' => [ 'sharedwiki' ],
-				'SharedTables' => [ 'user', 'actor' ]
+				MainConfigNames::SharedDB => [ 'sharedwiki' ],
+				MainConfigNames::SharedTables => [ 'user', 'actor' ]
 			], // $config
 			false, // $expectedDomain
 		];
diff --git a/tests/phpunit/unit/includes/user/CentralId/CentralIdLookupFactoryTest.php b/tests/phpunit/unit/includes/user/CentralId/CentralIdLookupFactoryTest.php
index 9295269a49e5..8f154d489ca5 100644
--- a/tests/phpunit/unit/includes/user/CentralId/CentralIdLookupFactoryTest.php
+++ b/tests/phpunit/unit/includes/user/CentralId/CentralIdLookupFactoryTest.php
@@ -7,6 +7,7 @@ use HashConfig;
 use InvalidArgumentException;
 use LocalIdLookup;
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\User\CentralId\CentralIdLookupFactory;
 use MediaWiki\User\UserIdentityLookup;
 use MediaWikiUnitTestCase;
@@ -33,9 +34,9 @@ class CentralIdLookupFactoryTest extends MediaWikiUnitTestCase {
 			->willReturnMap( [
 				[ 'DBLoadBalancer', $this->createMock( ILoadBalancer::class ) ],
 				[ 'MainConfig', new HashConfig( [
-					'SharedDB' => null,
-					'SharedTables' => [],
-					'LocalDatabases' => [],
+					MainConfigNames::SharedDB => null,
+					MainConfigNames::SharedTables => [],
+					MainConfigNames::LocalDatabases => [],
 				] ) ],
 			] );
 		$localIdLookupTest = [
@@ -49,14 +50,14 @@ class CentralIdLookupFactoryTest extends MediaWikiUnitTestCase {
 			new ServiceOptions(
 				CentralIdLookupFactory::CONSTRUCTOR_OPTIONS,
 				[
-					'CentralIdLookupProviders' => [
+					MainConfigNames::CentralIdLookupProviders => [
 						'local' => $localIdLookupTest,
 						'local2' => $localIdLookupTest,
 						'mock' => [ 'factory' => function () {
 							return $this->centralLookupMock;
 						} ]
 					],
-					'CentralIdLookupProvider' => 'mock',
+					MainConfigNames::CentralIdLookupProvider => 'mock',
 				]
 			),
 			new ObjectFactory( $services ),
diff --git a/tests/phpunit/unit/includes/user/UserNameUtilsTest.php b/tests/phpunit/unit/includes/user/UserNameUtilsTest.php
index e6298a821745..9fdaf104db90 100644
--- a/tests/phpunit/unit/includes/user/UserNameUtilsTest.php
+++ b/tests/phpunit/unit/includes/user/UserNameUtilsTest.php
@@ -1,5 +1,6 @@
 <?php
 
+use MediaWiki\MainConfigNames;
 use MediaWiki\Tests\Unit\DummyServicesTrait;
 use MediaWiki\User\UserRigorOptions;
 use Psr\Log\LogLevel;
@@ -59,7 +60,7 @@ class UserNameUtilsTest extends MediaWikiUnitTestCase {
 			->willReturn( 'reserved-user' );
 
 		$utils = $this->getDummyUserNameUtils( [
-			'ReservedUsernames' => [
+			MainConfigNames::ReservedUsernames => [
 				'MediaWiki default',
 				'msg:reserved-user'
 			],
diff --git a/tests/phpunit/unit/includes/watchlist/WatchlistManagerTest.php b/tests/phpunit/unit/includes/watchlist/WatchlistManagerTest.php
index 6f539e40fdb7..226bb7d1cd38 100644
--- a/tests/phpunit/unit/includes/watchlist/WatchlistManagerTest.php
+++ b/tests/phpunit/unit/includes/watchlist/WatchlistManagerTest.php
@@ -1,6 +1,7 @@
 <?php
 
 use MediaWiki\Config\ServiceOptions;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Page\PageIdentity;
 use MediaWiki\Page\PageIdentityValue;
 use MediaWiki\Page\PageReference;
@@ -48,7 +49,7 @@ class WatchlistManagerUnitTest extends MediaWikiUnitTestCase {
 	private function getManager( array $params = [] ) {
 		$config = $params['config'] ?? [
 			'UseEnotif' => false,
-			'ShowUpdatedMarker' => false,
+			MainConfigNames::ShowUpdatedMarker => false,
 		];
 		$options = new ServiceOptions(
 			WatchlistManager::CONSTRUCTOR_OPTIONS,
@@ -180,7 +181,7 @@ class WatchlistManagerUnitTest extends MediaWikiUnitTestCase {
 
 		$config = [
 			'UseEnotif' => true,
-			'ShowUpdatedMarker' => true
+			MainConfigNames::ShowUpdatedMarker => true
 		];
 
 		$userIdentity = new UserIdentityValue( 0, 'User Name' );
@@ -209,7 +210,7 @@ class WatchlistManagerUnitTest extends MediaWikiUnitTestCase {
 
 		$config = [
 			'UseEnotif' => true,
-			'ShowUpdatedMarker' => true
+			MainConfigNames::ShowUpdatedMarker => true
 		];
 
 		$userIdentity = new UserIdentityValue( 100, 'User Name' );
@@ -336,7 +337,7 @@ class WatchlistManagerUnitTest extends MediaWikiUnitTestCase {
 
 		$config = [
 			'UseEnotif' => true,
-			'ShowUpdatedMarker' => true
+			MainConfigNames::ShowUpdatedMarker => true
 		];
 
 		$userIdentity = new UserIdentityValue( 0, 'User Name' );
@@ -370,7 +371,7 @@ class WatchlistManagerUnitTest extends MediaWikiUnitTestCase {
 
 		$config = [
 			'UseEnotif' => true,
-			'ShowUpdatedMarker' => true
+			MainConfigNames::ShowUpdatedMarker => true
 		];
 
 		$userIdentity = new UserIdentityValue( 100, 'User Name' );