diff --git a/.phan/config.php b/.phan/config.php
index 03d1a762dee..5eb2b87d49b 100644
--- a/.phan/config.php
+++ b/.phan/config.php
@@ -1,7 +1,7 @@
 <?php declare(strict_types=1);
 return [
     'directory_list'                  => [ 'src/', 'vendor/' ],
-    'exclude_analysis_directory_list' => [ 'vendor/' ],
+    'exclude_analysis_directory_list' => [ 'vendor/', 'src/Framework/Assert/' ],
 
     'target_php_version'              => '7.1',
 ];