diff --git a/tests/phpunit/src/Commands/Self/MakeDocsCommandTest.php b/tests/phpunit/src/Commands/Self/MakeDocsCommandTest.php
index 6ae7a534b..1ae603ef9 100644
--- a/tests/phpunit/src/Commands/Self/MakeDocsCommandTest.php
+++ b/tests/phpunit/src/Commands/Self/MakeDocsCommandTest.php
@@ -7,6 +7,7 @@
 use Acquia\Cli\Command\CommandBase;
 use Acquia\Cli\Command\Self\MakeDocsCommand;
 use Acquia\Cli\Tests\CommandTestBase;
+use org\bovigo\vfs\vfsStream;
 
 /**
  * @property \Acquia\Cli\Command\Self\MakeDocsCommand $command
@@ -26,4 +27,11 @@ public function testMakeDocsCommand(): void
         $this->assertStringContainsString('============', $output);
         $this->assertStringContainsString('- `help`_', $output);
     }
+
+    public function testMakeDocsCommandDump(): void
+    {
+        $vfs = vfsStream::setup('root');
+        $this->executeCommand(['--dump' => $vfs->url()]);
+        $this->assertStringContainsString('The completion command dumps', $vfs->getChild('completion.json')->getContent());
+    }
 }