diff --git a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ComposerHookTest.php b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ComposerHookTest.php
index 52e2787858..8ff94785d7 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ComposerHookTest.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ComposerHookTest.php
@@ -81,7 +81,7 @@ public function testComposerHooks() {
     // project is "allowed" in our main fixture project, but not required.
     // We expect that requiring this library should re-scaffold, resulting
     // in a changed default.settings.php file.
-    $stdout = $this->mustExec("composer require --no-ansi --no-interaction fixtures/drupal-assets-fixture:dev-master fixtures/scaffold-override-fixture:dev-master", $sut);
+    $stdout = $this->mustExec("composer require --no-ansi --no-interaction fixtures/drupal-assets-fixture:dev-main fixtures/scaffold-override-fixture:dev-main", $sut);
     $this->assertScaffoldedFile($sut . '/sites/default/default.settings.php', FALSE, 'scaffolded from the scaffold-override-fixture');
     // Make sure that the appropriate notice informing us that scaffolding
     // is allowed was printed.
@@ -120,7 +120,7 @@ public function testComposerHooks() {
     $this->mustExec("composer install --no-ansi", $sut);
     // Require a project that is not allowed to scaffold and confirm that we
     // get a warning, and it does not scaffold.
-    $stdout = $this->mustExec("composer require --no-ansi --no-interaction fixtures/drupal-assets-fixture:dev-master fixtures/scaffold-override-fixture:dev-master", $sut);
+    $stdout = $this->mustExec("composer require --no-ansi --no-interaction fixtures/drupal-assets-fixture:dev-main fixtures/scaffold-override-fixture:dev-main", $sut);
     $this->assertFileDoesNotExist($sut . '/sites/default/default.settings.php');
     $this->assertStringContainsString("Not scaffolding files for fixtures/scaffold-override-fixture, because it is not listed in the element 'extra.drupal-scaffold.allowed-packages' in the root-level composer.json file.", $stdout);
   }