diff --git a/phpBB/phpbb/composer/installer.php b/phpBB/phpbb/composer/installer.php
index 9244644788..3e6d87d46f 100644
--- a/phpBB/phpbb/composer/installer.php
+++ b/phpBB/phpbb/composer/installer.php
@@ -591,6 +591,7 @@ class installer
 				$repositories[] = [
 					'type' => 'composer',
 					'url' => $repository,
+					'canonical' => $this->packagist ? false : true,
 				];
 			}
 		}
diff --git a/tests/functional/extension_acp_test.php b/tests/functional/extension_acp_test.php
index f36df243f3..a4d45506f4 100644
--- a/tests/functional/extension_acp_test.php
+++ b/tests/functional/extension_acp_test.php
@@ -254,6 +254,7 @@ class phpbb_functional_extension_acp_test extends phpbb_functional_test_case
 
 		$form = $crawler->selectButton('Submit')->form();
 		$form['minimum_stability']->select('dev');
+		$form['repositories'] = 'https://satis.phpbb.com/';
 		$crawler = self::submit($form);
 		$this->assertContainsLang('CONFIG_UPDATED', $crawler->filter('div[class="successbox"] > p')->text());