diff --git a/src/workflow/ArcanistUnitWorkflow.php b/src/workflow/ArcanistUnitWorkflow.php
index d5f7e7cc..6891a396 100644
--- a/src/workflow/ArcanistUnitWorkflow.php
+++ b/src/workflow/ArcanistUnitWorkflow.php
@@ -72,6 +72,18 @@ EOTEXT
       'json' => array(
         'help' => 'Report results in JSON format.',
       ),
+      'output' => array(
+        'param' => 'format',
+        'help' =>
+          "With 'full', show full pretty report (Default). ".
+          "With 'json', report results in JSON format. ".
+          "With 'ugly', use uglier (but more efficient) JSON formatting. ".
+          "With 'none', don't print results. ",
+        'conflicts' => array(
+          'json' => 'Only one output format allowed',
+          'ugly' => 'Only one output format allowed',
+        )
+      ),
       'everything' => array(
         'help' => 'Run every test.',
         'conflicts' => array(
@@ -162,9 +174,9 @@ EOTEXT
 
     $console = PhutilConsole::getConsole();
 
-    $json_output = $this->getArgument('json');
+    $output_format = $this->getOutputFormat();
 
-    if ($json_output) {
+    if ($output_format !== 'full') {
       $console->disableOut();
     }
 
@@ -252,17 +264,24 @@ EOTEXT
       }
     }
 
-    if ($json_output) {
+    if ($output_format !== 'full') {
       $console->enableOut();
-
-      $data = array_values(mpull($results, 'toDictionary'));
-
-      if ($this->getArgument('ugly')) {
+    }
+    $data = array_values(mpull($results, 'toDictionary'));
+    switch ($output_format) {
+      case 'ugly':
         $console->writeOut('%s', json_encode($data));
-      } else {
+        break;
+      case 'json':
         $json = new PhutilJSON();
         $console->writeOut('%s', $json->encodeFormatted($data));
-      }
+        break;
+      case 'full':
+        // already printed
+        break;
+      case 'none':
+        // do nothing
+        break;
     }
 
     return $overall_result;
@@ -316,4 +335,21 @@ EOTEXT
 
     return $out;
   }
+
+  private function getOutputFormat() {
+    if ($this->getArgument('ugly')) {
+      return 'ugly';
+    }
+    if ($this->getArgument('json')) {
+      return 'json';
+    }
+    $format = $this->getArgument('output');
+    $known_formats = array(
+      'none' => 'none',
+      'json' => 'json',
+      'ugly' => 'ugly',
+      'full' => 'full',
+    );
+    return idx($known_formats, $format, 'full');
+  }
 }