diff --git a/Sources/Actions/Moderation/Logs.php b/Sources/Actions/Moderation/Logs.php
index 1f70326e90c..6698e528c97 100644
--- a/Sources/Actions/Moderation/Logs.php
+++ b/Sources/Actions/Moderation/Logs.php
@@ -344,7 +344,8 @@ public static function list_getModLogEntries(int $start, int $items_per_page, st
 				'reg_group_id' => 0,
 				'log_type' => $log_type,
 				'modlog_query' => $modlog_query,
-				'sort' => $sort,
+				// Entries that tie on the sorted column stay in the order they were logged, turned around along with it.
+				'sort' => $sort . ', lm.id_action' . (preg_match('/\sDESC$/i', $sort) ? ' DESC' : ''),
 				'start' => $start,
 				'max' => $items_per_page,
 			]),
diff --git a/tests/Integration/ModLogTest.php b/tests/Integration/ModLogTest.php
new file mode 100644
index 00000000000..93b81e98f19
--- /dev/null
+++ b/tests/Integration/ModLogTest.php
@@ -0,0 +1,148 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SMF\Tests\Integration;
+
+use PHPUnit\Framework\Attributes\CoversMethod;
+use PHPUnit\Framework\Attributes\DataProvider;
+use SMF\Actions\Moderation\Logs;
+use SMF\Db\DatabaseApi as Db;
+
+/**
+ * Covers the order of the entries in the moderation and administration logs.
+ */
+#[CoversMethod(Logs::class, 'list_getModLogEntries')]
+class ModLogTest extends IntegrationTestCase
+{
+	/*********************
+	 * Internal properties
+	 *********************/
+
+	/**
+	 * @var int
+	 *
+	 * A log time no other entry has, so that the test sees only its own.
+	 */
+	private int $time;
+
+	/****************
+	 * Public methods
+	 ****************/
+
+	/**
+	 * Entries logged in the same second tie on the time column, and with only
+	 * that column to go on the database chooses their order. MySQL lists them
+	 * oldest first, the opposite of the rest of the log. PostgreSQL lists them
+	 * newest first until one of the rows is rewritten, after which it does not,
+	 * so at the edge of a page which of them are shown can change between page
+	 * loads.
+	 */
+	public function testEntriesLoggedInTheSameSecondAreNewestFirst(): void
+	{
+		[$older, $newer] = $this->logTwice();
+
+		$this->assertSame([$newer, $older], $this->listed('lm.log_time DESC'));
+	}
+
+	/**
+	 * Every column can tie, so every column needs the same tiebreaker. The
+	 * sort a list passes is the column's default or its reverse, and the ties
+	 * turn around along with it.
+	 *
+	 * @param string $sort The ORDER BY clause the list passes.
+	 * @param bool $newest_first Whether the tied entries should come out newest first.
+	 */
+	#[DataProvider('sorts')]
+	public function testTiesFollowTheDirectionOfTheSort(string $sort, bool $newest_first): void
+	{
+		[$older, $newer] = $this->logTwice();
+
+		$this->assertSame($newest_first ? [$newer, $older] : [$older, $newer], $this->listed($sort));
+	}
+
+	/***********************
+	 * Public static methods
+	 ***********************/
+
+	/**
+	 * The sorts both log lists offer, each of which ties for two entries made
+	 * by the same moderator at the same time.
+	 *
+	 * @return array The cases.
+	 */
+	public static function sorts(): array
+	{
+		return [
+			'time, oldest first' => ['lm.log_time', false],
+			'action' => ['lm.action', false],
+			'action, reversed' => ['lm.action DESC', true],
+			'moderator' => ['mem.real_name', false],
+			'moderator, reversed' => ['mem.real_name DESC', true],
+			'position, reversed' => ['mg.group_name DESC', true],
+			'ip' => ['lm.ip', false],
+		];
+	}
+
+	/******************
+	 * Internal methods
+	 ******************/
+
+	/**
+	 * Acts as the administrator, who sees the whole log.
+	 */
+	protected function setUp(): void
+	{
+		parent::setUp();
+
+		$this->actingAs($this->adminId());
+		$this->time = random_int(1_000_000_000, 1_100_000_000);
+	}
+
+	/**
+	 * Logs two identical entries in the administration log at the same time.
+	 *
+	 * @return array The older entry's id and the newer one's.
+	 */
+	private function logTwice(): array
+	{
+		$ids = [];
+
+		for ($i = 0; $i < 2; $i++) {
+			$ids[] = (int) Db::$db->insert(
+				'insert',
+				'{db_prefix}log_actions',
+				[
+					'id_log' => 'int',
+					'log_time' => 'int',
+					'id_member' => 'int',
+					'action' => 'string',
+					'extra' => 'string',
+				],
+				[[3, $this->time, $this->adminId(), 'modlog_test', '{}']],
+				['id_action'],
+				1,
+			);
+		}
+
+		return $ids;
+	}
+
+	/**
+	 * Lists the test's entries from the administration log.
+	 *
+	 * @param string $sort The ORDER BY clause, as the list passes it.
+	 * @return array The ids of the entries, in the order they were listed.
+	 */
+	private function listed(string $sort): array
+	{
+		return array_keys(Logs::list_getModLogEntries(
+			0,
+			10,
+			$sort,
+			'lm.log_time = {int:tied_time}',
+			['tied_time' => $this->time],
+			3,
+		));
+	}
+}