diff --git a/src/repository/api/ArcanistSubversionAPI.php b/src/repository/api/ArcanistSubversionAPI.php
--- a/src/repository/api/ArcanistSubversionAPI.php
+++ b/src/repository/api/ArcanistSubversionAPI.php
@@ -658,9 +658,7 @@
 
     $results = $conduit->callMethodSynchronous(
       'differential.query',
-      $query + array(
-        'arcanistProjects' => array($project),
-      ));
+      $query);
 
     foreach ($results as $key => $result) {
       if ($result['sourcePath'] != $this->getPath()) {
diff --git a/src/workflow/ArcanistDiffWorkflow.php b/src/workflow/ArcanistDiffWorkflow.php
--- a/src/workflow/ArcanistDiffWorkflow.php
+++ b/src/workflow/ArcanistDiffWorkflow.php
@@ -2254,7 +2254,6 @@
       'sourceControlPath'         => $base_path,
       'sourceControlBaseRevision' => $base_revision,
       'creationMethod'            => 'arc',
-      'arcanistProject'           => $project_id,
     );
 
     if (!$this->isRawDiffSource()) {
diff --git a/src/workflow/ArcanistPatchWorkflow.php b/src/workflow/ArcanistPatchWorkflow.php
--- a/src/workflow/ArcanistPatchWorkflow.php
+++ b/src/workflow/ArcanistPatchWorkflow.php
@@ -914,7 +914,6 @@
         'differential.query',
         array(
           'phids' => $phids,
-          'arcanistProjects' => array($bundle->getProjectID()),
         ));
       $revs = array();
       foreach ($dep_on_revs as $dep_on_rev) {