diff --git a/tests/phpunit/includes/debug/DeprecationHelperTest.php b/tests/phpunit/includes/debug/DeprecationHelperTest.php
index 3bbf38cdf7d..eed92578521 100644
--- a/tests/phpunit/includes/debug/DeprecationHelperTest.php
+++ b/tests/phpunit/includes/debug/DeprecationHelperTest.php
@@ -41,19 +41,19 @@ class DeprecationHelperTest extends MediaWikiIntegrationTestCase {
 		return [
 			[ 'protectedDeprecated', null,
 				'Use of TestDeprecatedClass::$protectedDeprecated was deprecated in MediaWiki 1.23. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'privateDeprecated', null,
 				'Use of TestDeprecatedClass::$privateDeprecated was deprecated in MediaWiki 1.24. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackDeprecated', null,
 				'Use of TestDeprecatedClass::$fallbackDeprecated was deprecated in MediaWiki 1.25. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackDeprecatedMethodName', null,
 				'Use of TestDeprecatedClass::$fallbackDeprecatedMethodName was deprecated in MediaWiki 1.26. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackGetterOnly', null,
 				'Use of TestDeprecatedClass::$fallbackGetterOnly was deprecated in MediaWiki 1.25. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'protectedNonDeprecated', E_USER_ERROR,
 				'Cannot access non-public property TestDeprecatedClass::$protectedNonDeprecated' ],
 			[ 'privateNonDeprecated', E_USER_ERROR,
@@ -74,7 +74,7 @@ class DeprecationHelperTest extends MediaWikiIntegrationTestCase {
 				$testObject->dynamic_property = 'bla';
 			},
 			'Use of TestDeprecatedClass::$dynamic_property was deprecated in MediaWiki 1.23. ' .
-				'[Called from DeprecationHelperTest::{closure}'
+				'[Called from DeprecationHelperTest::{closure'
 		);
 	}
 
@@ -95,7 +95,7 @@ class DeprecationHelperTest extends MediaWikiIntegrationTestCase {
 				$this->assertSame( 'bla', $testObject->dynamic_property ?? 'bla' );
 			},
 			'Use of TestDeprecatedClass::$dynamic_property was deprecated in MediaWiki 1.23. ' .
-				'[Called from DeprecationHelperTest::{closure}'
+				'[Called from DeprecationHelperTest::{closure'
 		);
 	}
 
@@ -135,16 +135,16 @@ class DeprecationHelperTest extends MediaWikiIntegrationTestCase {
 		return [
 			[ 'protectedDeprecated', null,
 				'Use of TestDeprecatedClass::$protectedDeprecated was deprecated in MediaWiki 1.23. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'privateDeprecated', null,
 				'Use of TestDeprecatedClass::$privateDeprecated was deprecated in MediaWiki 1.24. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackDeprecated', null,
 				'Use of TestDeprecatedClass::$fallbackDeprecated was deprecated in MediaWiki 1.25. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackDeprecatedMethodName', null,
 				'Use of TestDeprecatedClass::$fallbackDeprecatedMethodName was deprecated in MediaWiki 1.26. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 			[ 'fallbackGetterOnly', E_USER_ERROR,
 				'Cannot access non-public property TestDeprecatedClass::$fallbackGetterOnly' ],
 			[ 'protectedNonDeprecated', E_USER_ERROR,
@@ -153,7 +153,7 @@ class DeprecationHelperTest extends MediaWikiIntegrationTestCase {
 				'Cannot access non-public property TestDeprecatedClass::$privateNonDeprecated', 1 ],
 			[ 'nonExistent', null,
 				'Use of TestDeprecatedClass::$nonExistent was deprecated in MediaWiki 1.23. ' .
-					'[Called from DeprecationHelperTest::{closure}' ],
+					'[Called from DeprecationHelperTest::{closure' ],
 		];
 	}