diff --git a/src/Illuminate/Mail/Mailable.php b/src/Illuminate/Mail/Mailable.php
index 1fe0b7ea3d20..903bd5f5f41b 100644
--- a/src/Illuminate/Mail/Mailable.php
+++ b/src/Illuminate/Mail/Mailable.php
@@ -170,7 +170,7 @@ class Mailable implements MailableContract, Renderable
      */
     public function send($mailer)
     {
-        return $this->withLocale($this->locale, function () use ($mailer) {
+        $this->withLocale($this->locale, function () use ($mailer) {
             Container::getInstance()->call([$this, 'build']);
 
             $mailer = $mailer instanceof MailFactory
diff --git a/src/Illuminate/Mail/Mailer.php b/src/Illuminate/Mail/Mailer.php
index 668d68baaf2a..128f211f7651 100755
--- a/src/Illuminate/Mail/Mailer.php
+++ b/src/Illuminate/Mail/Mailer.php
@@ -197,7 +197,7 @@ public function bcc($users)
      */
     public function html($html, $callback)
     {
-        return $this->send(['html' => new HtmlString($html)], [], $callback);
+        $this->send(['html' => new HtmlString($html)], [], $callback);
     }
 
     /**
@@ -209,7 +209,7 @@ public function html($html, $callback)
      */
     public function raw($text, $callback)
     {
-        return $this->send(['raw' => $text], [], $callback);
+        $this->send(['raw' => $text], [], $callback);
     }
 
     /**
@@ -222,7 +222,7 @@ public function raw($text, $callback)
      */
     public function plain($view, array $data, $callback)
     {
-        return $this->send(['text' => $view], $data, $callback);
+        $this->send(['text' => $view], $data, $callback);
     }
 
     /**
diff --git a/src/Illuminate/Mail/PendingMail.php b/src/Illuminate/Mail/PendingMail.php
index 43c30961f90b..10d76cb6aa9b 100644
--- a/src/Illuminate/Mail/PendingMail.php
+++ b/src/Illuminate/Mail/PendingMail.php
@@ -114,11 +114,11 @@ public function bcc($users)
      * Send a new mailable message instance.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable  $mailable
-     * @return mixed
+     * @return void
      */
     public function send(MailableContract $mailable)
     {
-        return $this->mailer->send($this->fill($mailable));
+        $this->mailer->send($this->fill($mailable));
     }
 
     /**
diff --git a/src/Illuminate/Notifications/ChannelManager.php b/src/Illuminate/Notifications/ChannelManager.php
index d2344ab68acc..8eb9c251024d 100644
--- a/src/Illuminate/Notifications/ChannelManager.php
+++ b/src/Illuminate/Notifications/ChannelManager.php
@@ -34,7 +34,7 @@ class ChannelManager extends Manager implements DispatcherContract, FactoryContr
      */
     public function send($notifiables, $notification)
     {
-        return (new NotificationSender(
+        (new NotificationSender(
             $this, $this->container->make(Bus::class), $this->container->make(Dispatcher::class), $this->locale)
         )->send($notifiables, $notification);
     }
@@ -49,7 +49,7 @@ public function send($notifiables, $notification)
      */
     public function sendNow($notifiables, $notification, array $channels = null)
     {
-        return (new NotificationSender(
+        (new NotificationSender(
             $this, $this->container->make(Bus::class), $this->container->make(Dispatcher::class), $this->locale)
         )->sendNow($notifiables, $notification, $channels);
     }
diff --git a/src/Illuminate/Notifications/NotificationSender.php b/src/Illuminate/Notifications/NotificationSender.php
index 39be0e598796..aff36c7a5b0f 100644
--- a/src/Illuminate/Notifications/NotificationSender.php
+++ b/src/Illuminate/Notifications/NotificationSender.php
@@ -76,7 +76,7 @@ public function send($notifiables, $notification)
             return $this->queueNotification($notifiables, $notification);
         }
 
-        return $this->sendNow($notifiables, $notification);
+        $this->sendNow($notifiables, $notification);
     }
 
     /**
diff --git a/src/Illuminate/Support/Testing/Fakes/EventFake.php b/src/Illuminate/Support/Testing/Fakes/EventFake.php
index 90f30212ef7b..88fcb84cea48 100644
--- a/src/Illuminate/Support/Testing/Fakes/EventFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/EventFake.php
@@ -278,7 +278,7 @@ public function forgetPushed()
      *
      * @param  string|object  $event
      * @param  mixed  $payload
-     * @return void
+     * @return array|null
      */
     public function until($event, $payload = [])
     {
diff --git a/src/Illuminate/Support/Testing/Fakes/NotificationFake.php b/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
index cf3a25afd696..28526d592556 100644
--- a/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
@@ -210,7 +210,7 @@ protected function notificationsFor($notifiable, $notification)
      */
     public function send($notifiables, $notification)
     {
-        return $this->sendNow($notifiables, $notification);
+        $this->sendNow($notifiables, $notification);
     }
 
     /**
diff --git a/src/Illuminate/Support/Testing/Fakes/PendingMailFake.php b/src/Illuminate/Support/Testing/Fakes/PendingMailFake.php
index c39012501ae6..52251301ceb9 100644
--- a/src/Illuminate/Support/Testing/Fakes/PendingMailFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/PendingMailFake.php
@@ -22,11 +22,11 @@ public function __construct($mailer)
      * Send a new mailable message instance.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable  $mailable
-     * @return mixed
+     * @return void
      */
     public function send(Mailable $mailable)
     {
-        return $this->mailer->send($this->fill($mailable));
+        $this->mailer->send($this->fill($mailable));
     }
 
     /**
diff --git a/src/Illuminate/Support/Testing/Fakes/QueueFake.php b/src/Illuminate/Support/Testing/Fakes/QueueFake.php
index e83408fc0c74..64d6414fd81b 100644
--- a/src/Illuminate/Support/Testing/Fakes/QueueFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/QueueFake.php
@@ -74,7 +74,7 @@ public function assertPushedOn($queue, $job, $callback = null)
             [$job, $callback] = [$this->firstClosureParameterType($job), $job];
         }
 
-        return $this->assertPushed($job, function ($job, $pushedQueue) use ($callback, $queue) {
+        $this->assertPushed($job, function ($job, $pushedQueue) use ($callback, $queue) {
             if ($pushedQueue !== $queue) {
                 return false;
             }