diff --git a/src/TextUI/Command.php b/src/TextUI/Command.php
index a25e9f54b55..04ea2593ecd 100644
--- a/src/TextUI/Command.php
+++ b/src/TextUI/Command.php
@@ -1257,6 +1257,11 @@ private function handleOrderByOption(string $value): void
 
                     break;
 
+                case 'duration':
+                    $this->arguments['executionOrder'] = TestSuiteSorter::ORDER_DURATION;
+
+                    break;
+
                 case 'reverse':
                     $this->arguments['executionOrder'] = TestSuiteSorter::ORDER_REVERSED;
 
diff --git a/src/TextUI/Help.php b/src/TextUI/Help.php
index 869043d8ce7..97e5883709c 100644
--- a/src/TextUI/Help.php
+++ b/src/TextUI/Help.php
@@ -100,7 +100,7 @@ final class Help
             ['arg'    => '--printer <printer>', 'desc' => 'TestListener implementation to use'],
             ['spacer' => ''],
 
-            ['arg'  => '--order-by=<order>', 'desc' => 'Run tests in order: default|reverse|random|defects|no-depends'],
+            ['arg'  => '--order-by=<order>', 'desc' => 'Run tests in order: default|duration|reverse|random|defects|no-depends'],
             ['arg'  => '--random-order-seed=<N>', 'desc' => 'Use a specific random seed <N> for random order'],
             ['arg'  => '--cache-result', 'desc' => 'Write test results to cache file'],
             ['arg'  => '--do-not-cache-result', 'desc' => 'Do not write test results to cache file'],