diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index 200b2597f3..4d9000fed7 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -974,8 +974,8 @@ class FormulaAuditor
       problem "Use `assert_predicate <path_to_file>, :exist?` instead of `#{Regexp.last_match(1)}`"
     end
 
-    if line =~ /assert !File\.exist\?/
-      problem "Use `refute_predicate <path_to_file>, :exist?` instead of `assert !File.exist?`"
+    if line =~ /(assert !File\.exist\?|assert !\(.*\)\.exist\?)/
+      problem "Use `refute_predicate <path_to_file>, :exist?` instead of `#{Regexp.last_match(1)}`"
     end
 
     return unless @strict