diff --git a/src/Illuminate/Support/Testing/Fakes/MailFake.php b/src/Illuminate/Support/Testing/Fakes/MailFake.php
index 48392d1d1b9d..429f089bacc1 100644
--- a/src/Illuminate/Support/Testing/Fakes/MailFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/MailFake.php
@@ -36,9 +36,15 @@ public function assertSent($mailable, $callback = null)
             return $this->assertSentTimes($mailable, $callback);
         }
 
+        $message = "The expected [{$mailable}] mailable was not sent.";
+
+        if (count($this->queuedMailables) > 0) {
+            $message .= ' Did you mean to use assertQueued() instead?';
+        }
+
         PHPUnit::assertTrue(
             $this->sent($mailable, $callback)->count() > 0,
-            "The expected [{$mailable}] mailable was not sent."
+            $message
         );
     }