diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -595,7 +595,7 @@
       $workflow->userName = $this->getUserName();
     }
 
-    if ($this->conduit) {
+    if ($this->conduit && !$workflow->conduit) {
       $workflow->conduit = $this->conduit;
       $workflow->setConduitCredentials($this->conduitCredentials);
       $workflow->conduitAuthenticated = $this->conduitAuthenticated;