diff --git a/phpBB/phpbb/cache/driver/base.php b/phpBB/phpbb/cache/driver/base.php
index a93e6ce08c..9dfc28b3f6 100644
--- a/phpBB/phpbb/cache/driver/base.php
+++ b/phpBB/phpbb/cache/driver/base.php
@@ -31,32 +31,32 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 		try
 		{
 			$iterator = new \DirectoryIterator($this->cache_dir);
+
+			foreach ($iterator as $fileInfo)
+			{
+				if ($fileInfo->isDot())
+				{
+					continue;
+				}
+				$filename = $fileInfo->getFilename();
+				if ($fileInfo->isDir())
+				{
+					$this->remove_dir($fileInfo->getPathname());
+				}
+				else if (strpos($filename, 'container_') === 0 ||
+					strpos($filename, 'autoload_') === 0 ||
+					strpos($filename, 'url_matcher') === 0 ||
+					strpos($filename, 'url_generator') === 0 ||
+					strpos($filename, 'sql_') === 0 ||
+					strpos($filename, 'data_') === 0)
+				{
+					$this->remove_file($fileInfo->getPathname());
+				}
+			}
 		}
 		catch (\Exception $e)
 		{
-			return;
-		}
-
-		foreach ($iterator as $fileInfo)
-		{
-			if ($fileInfo->isDot())
-			{
-				continue;
-			}
-			$filename = $fileInfo->getFilename();
-			if ($fileInfo->isDir())
-			{
-				$this->remove_dir($fileInfo->getPathname());
-			}
-			else if (strpos($filename, 'container_') === 0 ||
-				strpos($filename, 'autoload_') === 0 ||
-				strpos($filename, 'url_matcher') === 0 ||
-				strpos($filename, 'url_generator') === 0 ||
-				strpos($filename, 'sql_') === 0 ||
-				strpos($filename, 'data_') === 0)
-			{
-				$this->remove_file($fileInfo->getPathname());
-			}
+			// Do not return, to purge vars cached in memory
 		}
 
 		unset($this->vars);
diff --git a/phpBB/phpbb/cache/driver/memory.php b/phpBB/phpbb/cache/driver/memory.php
index 4ccd0607cd..feee588860 100644
--- a/phpBB/phpbb/cache/driver/memory.php
+++ b/phpBB/phpbb/cache/driver/memory.php
@@ -50,18 +50,7 @@ abstract class memory extends \phpbb\cache\driver\base
 	*/
 	function purge()
 	{
-		unset($this->vars);
-		unset($this->sql_rowset);
-		unset($this->sql_row_pointer);
-
-		if (function_exists('opcache_reset'))
-		{
-			@opcache_reset();
-		}
-
-		$this->vars = [];
-		$this->sql_rowset = [];
-		$this->sql_row_pointer = [];
+		parent::purge();
 
 		$this->is_modified = true;
 
diff --git a/tests/auth/provider_apache_test.php b/tests/auth/provider_apache_test.php
index f291751575..2094205bfe 100644
--- a/tests/auth/provider_apache_test.php
+++ b/tests/auth/provider_apache_test.php
@@ -74,10 +74,10 @@ class phpbb_auth_provider_apache_test extends phpbb_database_test_case
 			->will($this->returnValue(true));
 		$this->request->expects($this->exactly(2))
 			->method('server')
-			->willReturnCallback(fn(string $arg) => match(true) {
-				$arg === 'PHP_AUTH_USER' => 'foobar',
-				$arg === 'PHP_AUTH_PW' => 'example',
-			});
+			->willReturnMap([
+				['PHP_AUTH_USER', 'foobar'],
+				['PHP_AUTH_PW', 'example']
+			]);
 
 		$expected = array(
 			'status'		=> LOGIN_SUCCESS,
diff --git a/tests/dbal/connect_test.php b/tests/dbal/connect_test.php
index d1ec75470a..7220a60bf7 100644
--- a/tests/dbal/connect_test.php
+++ b/tests/dbal/connect_test.php
@@ -35,7 +35,7 @@ class phpbb_dbal_connect_test extends phpbb_database_test_case
 
 		if ($db->get_sql_layer() === 'mysqli')
 		{
-				$this->setExpectedTriggerError(E_WARNING);
+			$this->setExpectedTriggerError(E_WARNING);
 		}
 		else if ($db->get_sql_layer() !== 'sqlite3')
 		{
diff --git a/tests/functional/extension_acp_test.php b/tests/functional/extension_acp_test.php
index bcc299fae5..30dcaa89c7 100644
--- a/tests/functional/extension_acp_test.php
+++ b/tests/functional/extension_acp_test.php
@@ -255,7 +255,6 @@ class phpbb_functional_extension_acp_test extends phpbb_functional_test_case
 
 		$form = $crawler->selectButton('Submit')->form();
 		$form['minimum_stability']->select('dev');
-		$form['enable_packagist']->select('1');
 		$form['repositories'] = 'https://satis.phpbb.com/';
 		$crawler = self::submit($form);
 		$this->assertContainsLang('CONFIG_UPDATED', $crawler->filter('div[class="successbox"] > p')->text());
diff --git a/tests/text_processing/message_parser_test.php b/tests/text_processing/message_parser_test.php
index ca301b9b3e..35dcb4b566 100644
--- a/tests/text_processing/message_parser_test.php
+++ b/tests/text_processing/message_parser_test.php
@@ -61,7 +61,7 @@ class phpbb_text_processing_message_parser_test extends phpbb_test_case
 		$user->style = array('style_id' => 1);
 
 		$user->expects($this->any())
-			-> method('__get')->with('lang')->willReturn([
+			->method('__get')->with('lang')->willReturn([
 				'NO_POLL_TITLE' => 'You have to enter a poll title.',
 				'POLL_TITLE_TOO_LONG' => 'The poll title must contain fewer than 100 characters.',
 				'POLL_TITLE_COMP_TOO_LONG' => 'The parsed size of your poll title is too large, consider removing BBCodes or smilies.',