public function testPreemptiveRefresh() {
		$this->markTestSkippedIfPhp( '>=', '8.2' );

--- a/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php
+++ b/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php
@@ -581,7 +581,7 @@ class WANObjectCacheTest extends MediaWikiUnitTestCase {
 
    public function testPreemptiveRefresh() {
        // (T353180) Flaky test, to fix and re-enable
-       self::markTestSkippedIfPhp( '>=', '8.2' );
+       // self::markTestSkippedIfPhp( '>=', '8.2' );
 
        $value = 'KatCafe';
        $wasSet = 0;

$ composer phpunit tests/phpunit/unit/includes/libs/objectcache/
Using PHP 8.3.24
Running without MediaWiki settings because there are no integration tests
PHPUnit 9.6.21 by Sebastian Bergmann and contributors.

.....................................................F.........  63 / 123 ( 51%)
............................................................    123 / 123 (100%)

Time: 00:00.047, Memory: 30.64 MB

There was 1 failure:

1) Wikimedia\Tests\ObjectCache\WANObjectCacheTest::testPreemptiveRefresh
Value cached
Failed asserting that 2 is identical to 1.

/Users/krinkle/Development/mediawiki/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php:671

--- a/includes/libs/objectcache/WANObjectCache.php
+++ b/includes/libs/objectcache/WANObjectCache.php
@@ -2709,6 +2709,7 @@ class WANObjectCache implements
 		// Ramp up $chance from 0 to its nominal value over RAMPUP_TTL seconds to avoid stampedes
 		$chance *= ( $timeOld <= self::RAMPUP_TTL ) ? $timeOld / self::RAMPUP_TTL : 1;
 
+		$this->logger->debug( "worthRefreshPopular: $chance chance" );
 		return ( mt_rand( 1, 1_000_000_000 ) <= 1_000_000_000 * $chance );
 	}
 
(1/2) Stage this hunk [y,n,q,a,d,j,J,g,/,e,?]? y
@@ -2769,6 +2770,7 @@ class WANObjectCache implements
 		// having p(0)=0 and p(1)=1. The value expires at the nominal expiry.
 		$chance = $ttrRatio ** 4;
 
+		$this->logger->debug( "worthRefreshExpiring: $chance chance" );
 		return ( mt_rand( 1, 1_000_000_000 ) <= 1_000_000_000 * $chance );
 	}
 
(2/2) Stage this hunk [y,n,q,a,d,K,g,/,e,?]? y

diff --git a/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php b/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php
index 0742d78894..1dc3b2aab9 100644
--- a/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php
+++ b/tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php
@@ -651,7 +651,8 @@ class WANObjectCacheTest extends MediaWikiUnitTestCase {
 		$this->assertSame( $value, $v, "New value returned" );
 
 		$cache = new PopularityRefreshingWANObjectCache( [
-			'cache'   => new HashBagOStuff()
+			'cache'   => new HashBagOStuff(),
+			'logger' => new \MediaWiki\Logger\ConsoleLogger( 'objectcache' )
 		] );
 		$mockWallClock = 1549343530.0;
 		$cache->setMockTime( $mockWallClock );

$ composer phpunit tests/phpunit/unit/includes/libs/objectcache/WANObjectCacheTest.php 
Using PHP 8.3.24
Running without MediaWiki settings because there are no integration tests
PHPUnit 9.6.21 by Sebastian Bergmann and contributors.

............................[debug] [objectcache] fetchOrRegenerate(tiffany-breakfast:too-new-for-refresh): miss, new value computed
[debug] [objectcache] worthRefreshExpiring: 0.0625 chance
..................................... 65 / 98 ( 66%)
.................................                                 98 / 98 (100%)

Time: 00:00.043, Memory: 30.64 MB

OK (98 tests, 991 assertions)