diff --git a/src/applications/differential/parser/DifferentialChangesetParser.php b/src/applications/differential/parser/DifferentialChangesetParser.php
index 707235187b..1dd654c391 100644
--- a/src/applications/differential/parser/DifferentialChangesetParser.php
+++ b/src/applications/differential/parser/DifferentialChangesetParser.php
@@ -366,6 +366,9 @@ final class DifferentialChangesetParser extends Phobject {
     return $this;
   }
 
+  /**
+   * @return bool
+   */
   private function loadCache() {
     $render_cache_key = $this->getRenderCacheKey();
     if (!$render_cache_key) {
diff --git a/src/applications/drydock/worker/DrydockLeaseUpdateWorker.php b/src/applications/drydock/worker/DrydockLeaseUpdateWorker.php
index 2ae83da651..205cd469ed 100644
--- a/src/applications/drydock/worker/DrydockLeaseUpdateWorker.php
+++ b/src/applications/drydock/worker/DrydockLeaseUpdateWorker.php
@@ -279,7 +279,7 @@ final class DrydockLeaseUpdateWorker extends DrydockWorker {
 
     $phids = $lease->getAllocatedResourcePHIDs();
     if (!$phids) {
-      return null;
+      return;
     }
 
     $resources = id(new DrydockResourceQuery())
diff --git a/src/applications/flag/events/PhabricatorFlagsUIEventListener.php b/src/applications/flag/events/PhabricatorFlagsUIEventListener.php
index 872b495a93..ef6909adcb 100644
--- a/src/applications/flag/events/PhabricatorFlagsUIEventListener.php
+++ b/src/applications/flag/events/PhabricatorFlagsUIEventListener.php
@@ -29,7 +29,7 @@ final class PhabricatorFlagsUIEventListener extends PhabricatorEventListener {
     }
 
     if (!$this->canUseApplication($event->getUser())) {
-      return null;
+      return;
     }
 
     $flag = PhabricatorFlagQuery::loadUserFlag($user, $object->getPHID());
diff --git a/src/applications/tokens/event/PhabricatorTokenUIEventListener.php b/src/applications/tokens/event/PhabricatorTokenUIEventListener.php
index 25a2b44bf1..463621d1b7 100644
--- a/src/applications/tokens/event/PhabricatorTokenUIEventListener.php
+++ b/src/applications/tokens/event/PhabricatorTokenUIEventListener.php
@@ -42,7 +42,7 @@ final class PhabricatorTokenUIEventListener
     }
 
     if (!$this->canUseApplication($event->getUser())) {
-      return null;
+      return;
     }
 
     $can_interact = PhabricatorPolicyFilter::canInteract($user, $object);
@@ -93,7 +93,7 @@ final class PhabricatorTokenUIEventListener
     }
 
     if (!$this->canUseApplication($event->getUser())) {
-      return null;
+      return;
     }
 
     $tokens_given = id(new PhabricatorTokenGivenQuery())
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
index 0fd564d8a7..ebd233e28a 100644
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -4963,7 +4963,7 @@ abstract class PhabricatorApplicationTransactionEditor
       ->withProxyPHIDs($removed_phids)
       ->execute();
     if (!$proxy_columns) {
-      return array();
+      return;
     }
 
     $proxy_phids = mpull($proxy_columns, 'getPHID');