diff --git a/src/workflow/ArcanistCallConduitWorkflow.php b/src/workflow/ArcanistCallConduitWorkflow.php
--- a/src/workflow/ArcanistCallConduitWorkflow.php
+++ b/src/workflow/ArcanistCallConduitWorkflow.php
@@ -40,7 +40,7 @@
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 
diff --git a/src/workflow/ArcanistGitHookPreReceiveWorkflow.php b/src/workflow/ArcanistGitHookPreReceiveWorkflow.php
--- a/src/workflow/ArcanistGitHookPreReceiveWorkflow.php
+++ b/src/workflow/ArcanistGitHookPreReceiveWorkflow.php
@@ -37,7 +37,7 @@
     return true;
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 
diff --git a/src/workflow/ArcanistInstallCertificateWorkflow.php b/src/workflow/ArcanistInstallCertificateWorkflow.php
--- a/src/workflow/ArcanistInstallCertificateWorkflow.php
+++ b/src/workflow/ArcanistInstallCertificateWorkflow.php
@@ -35,7 +35,7 @@
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 
diff --git a/src/workflow/ArcanistPatchWorkflow.php b/src/workflow/ArcanistPatchWorkflow.php
--- a/src/workflow/ArcanistPatchWorkflow.php
+++ b/src/workflow/ArcanistPatchWorkflow.php
@@ -834,7 +834,7 @@
     return $commit_message;
   }
 
-  public function getShellCompletions(array $argv) {
+  protected function getShellCompletions(array $argv) {
     // TODO: Pull open diffs from 'arc list'?
     return array('ARGUMENT');
   }
diff --git a/src/workflow/ArcanistShellCompleteWorkflow.php b/src/workflow/ArcanistShellCompleteWorkflow.php
--- a/src/workflow/ArcanistShellCompleteWorkflow.php
+++ b/src/workflow/ArcanistShellCompleteWorkflow.php
@@ -36,7 +36,7 @@
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 
diff --git a/src/workflow/ArcanistSvnHookPreCommitWorkflow.php b/src/workflow/ArcanistSvnHookPreCommitWorkflow.php
--- a/src/workflow/ArcanistSvnHookPreCommitWorkflow.php
+++ b/src/workflow/ArcanistSvnHookPreCommitWorkflow.php
@@ -32,7 +32,7 @@
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }