diff --git a/tests/phpunit/includes/shell/CommandTest.php b/tests/phpunit/includes/shell/CommandTest.php
index 4aef7bb5326..985a8b50eaf 100644
--- a/tests/phpunit/includes/shell/CommandTest.php
+++ b/tests/phpunit/includes/shell/CommandTest.php
@@ -1,6 +1,7 @@
 <?php
 
 use MediaWiki\Shell\Command;
+use MediaWiki\Shell\Shell;
 use Wikimedia\TestingAccessWrapper;
 
 /**
@@ -181,4 +182,17 @@ class CommandTest extends PHPUnit\Framework\TestCase {
 		$result = $command->execute();
 		$this->assertSame( '', $result->getStdout() );
 	}
+
+	/**
+	 * @see T257278
+	 * @group Broken
+	 */
+	public function testDisablingRestrictions() {
+		$command = TestingAccessWrapper::newFromObject( new Command() );
+		// As CommandFactory does for the firejail case:
+		$command->restrict( Shell::RESTRICT_DEFAULT );
+		// Disable restrictions
+		$command->restrict( Shell::RESTRICT_NONE );
+		$this->assertSame( 0, $command->restrictions );
+	}
 }