diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -479,8 +479,8 @@
       // If we have `token`, this server supports the simpler, new-style
       // token-based authentication. Use that instead of all the certificate
       // stuff.
-      $token = idx($credentials, 'token', '');
-      if (strlen($token)) {
+      $token = idx($credentials, 'token');
+      if (phutil_nonempty_string($token)) {
         $conduit = $this->getConduit();
 
         $conduit->setConduitToken($token);
@@ -2244,8 +2244,8 @@
   protected function getModernUnitDictionary(array $map) {
     $map = $this->getModernCommonDictionary($map);
 
-    $details = idx($map, 'userData', '');
-    if (strlen($details)) {
+    $details = idx($map, 'userData');
+    if (phutil_nonempty_string($details)) {
       $map['details'] = (string)$details;
     }
     unset($map['userData']);