diff --git a/maintenance/deduplicateArchiveRevId.php b/maintenance/deduplicateArchiveRevId.php
index b614aad50e7..16eb59f5a23 100644
--- a/maintenance/deduplicateArchiveRevId.php
+++ b/maintenance/deduplicateArchiveRevId.php
@@ -214,5 +214,5 @@ class DeduplicateArchiveRevId extends LoggedUpdateMaintenance {
 
 }
 
-$maintClass = "DeduplicateArchiveRevId";
+$maintClass = DeduplicateArchiveRevId::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/maintenance/populateArchiveRevId.php b/maintenance/populateArchiveRevId.php
index 847d2eb385a..7b6e6ba02ed 100644
--- a/maintenance/populateArchiveRevId.php
+++ b/maintenance/populateArchiveRevId.php
@@ -294,5 +294,5 @@ class PopulateArchiveRevId extends LoggedUpdateMaintenance {
 	}
 }
 
-$maintClass = "PopulateArchiveRevId";
+$maintClass = PopulateArchiveRevId::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/maintenance/populateContentTables.php b/maintenance/populateContentTables.php
index 503a9771d16..e6fa69f8c55 100644
--- a/maintenance/populateContentTables.php
+++ b/maintenance/populateContentTables.php
@@ -384,5 +384,5 @@ class PopulateContentTables extends Maintenance {
 	}
 }
 
-$maintClass = 'PopulateContentTables';
+$maintClass = PopulateContentTables::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/maintenance/populateExternallinksIndex60.php b/maintenance/populateExternallinksIndex60.php
index 695773e2af5..28500bb362d 100644
--- a/maintenance/populateExternallinksIndex60.php
+++ b/maintenance/populateExternallinksIndex60.php
@@ -85,5 +85,5 @@ class PopulateExternallinksIndex60 extends LoggedUpdateMaintenance {
 	}
 }
 
-$maintClass = "PopulateExternallinksIndex60";
+$maintClass = PopulateExternallinksIndex60::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/maintenance/refreshExternallinksIndex.php b/maintenance/refreshExternallinksIndex.php
index 1551a94be50..42472d8d379 100644
--- a/maintenance/refreshExternallinksIndex.php
+++ b/maintenance/refreshExternallinksIndex.php
@@ -116,5 +116,5 @@ class RefreshExternallinksIndex extends LoggedUpdateMaintenance {
 	}
 }
 
-$maintClass = "RefreshExternallinksIndex";
+$maintClass = RefreshExternallinksIndex::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/parser/editTests.php b/tests/parser/editTests.php
index 7abc6df385b..74ad66d44f2 100644
--- a/tests/parser/editTests.php
+++ b/tests/parser/editTests.php
@@ -484,5 +484,5 @@ class ParserEditTests extends Maintenance {
 	}
 }
 
-$maintClass = 'ParserEditTests';
+$maintClass = ParserEditTests::class;
 require RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/parser/fuzzTest.php b/tests/parser/fuzzTest.php
index d827fc24b31..1fff2e794ad 100644
--- a/tests/parser/fuzzTest.php
+++ b/tests/parser/fuzzTest.php
@@ -195,5 +195,5 @@ class ParserFuzzTest extends Maintenance {
 	}
 }
 
-$maintClass = 'ParserFuzzTest';
+$maintClass = ParserFuzzTest::class;
 require RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/parser/parserTests.php b/tests/parser/parserTests.php
index 0713844ea0c..808da63886d 100644
--- a/tests/parser/parserTests.php
+++ b/tests/parser/parserTests.php
@@ -196,5 +196,5 @@ class ParserTestsMaintenance extends Maintenance {
 	}
 }
 
-$maintClass = 'ParserTestsMaintenance';
+$maintClass = ParserTestsMaintenance::class;
 require_once RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/phpunit/includes/api/generateRandomImages.php b/tests/phpunit/includes/api/generateRandomImages.php
index afc9ca00722..252c4d3a23d 100644
--- a/tests/phpunit/includes/api/generateRandomImages.php
+++ b/tests/phpunit/includes/api/generateRandomImages.php
@@ -40,5 +40,5 @@ class GenerateRandomImages extends Maintenance {
 	}
 }
 
-$maintClass = 'GenerateRandomImages';
+$maintClass = GenerateRandomImages::class;
 require RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/phpunit/phpunit.php b/tests/phpunit/phpunit.php
index 6e4ff3f630f..edceb1603c0 100755
--- a/tests/phpunit/phpunit.php
+++ b/tests/phpunit/phpunit.php
@@ -126,5 +126,5 @@ class PHPUnitMaintClass extends Maintenance {
 	}
 }
 
-$maintClass = 'PHPUnitMaintClass';
+$maintClass = PHPUnitMaintClass::class;
 require RUN_MAINTENANCE_IF_MAIN;
diff --git a/tests/qunit/data/generateJqueryMsgData.php b/tests/qunit/data/generateJqueryMsgData.php
index 30d993e1558..bc068721cdd 100644
--- a/tests/qunit/data/generateJqueryMsgData.php
+++ b/tests/qunit/data/generateJqueryMsgData.php
@@ -144,5 +144,5 @@ class GenerateJqueryMsgData extends Maintenance {
 	}
 }
 
-$maintClass = "GenerateJqueryMsgData";
+$maintClass = GenerateJqueryMsgData::class;
 require_once RUN_MAINTENANCE_IF_MAIN;