diff --git a/UniversalLanguageSelector.hooks.php b/UniversalLanguageSelector.hooks.php
index e0b159a8..cfeecb03 100644
--- a/UniversalLanguageSelector.hooks.php
+++ b/UniversalLanguageSelector.hooks.php
@@ -69,7 +69,7 @@ class UniversalLanguageSelectorHooks {
 		if ( $wgULSCompactLanguageLinksBetaFeature === true &&
 			$wgInterwikiMagic === true &&
 			$wgHideInterlanguageLinks === false &&
-			class_exists( 'BetaFeatures' ) &&
+			class_exists( BetaFeatures::class ) &&
 			BetaFeatures::isFeatureEnabled( $user, 'uls-compact-links' )
 		) {
 			// Compact language links is a beta feature in this wiki. Check the user's
diff --git a/data/LanguageNameIndexer.php b/data/LanguageNameIndexer.php
index c4a970bd..1d9318fb 100644
--- a/data/LanguageNameIndexer.php
+++ b/data/LanguageNameIndexer.php
@@ -156,5 +156,5 @@ PHP;
 	}
 }
 
-$maintClass = 'LanguageNameIndexer';
+$maintClass = LanguageNameIndexer::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/maintenance/ULSCompactLinksDisablePref.php b/maintenance/ULSCompactLinksDisablePref.php
index 00d4ed48..99a68392 100644
--- a/maintenance/ULSCompactLinksDisablePref.php
+++ b/maintenance/ULSCompactLinksDisablePref.php
@@ -117,5 +117,5 @@ class ULSCompactLinksDisablePref extends Maintenance {
 	}
 }
 
-$maintClass = "ULSCompactLinksDisablePref";
+$maintClass = ULSCompactLinksDisablePref::class;
 require_once RUN_MAINTENANCE_IF_MAIN;