diff --git a/Library/Homebrew/extend/os/mac/diagnostic.rb b/Library/Homebrew/extend/os/mac/diagnostic.rb
index 3e0c1d04d0..6d30cd2946 100644
--- a/Library/Homebrew/extend/os/mac/diagnostic.rb
+++ b/Library/Homebrew/extend/os/mac/diagnostic.rb
@@ -53,8 +53,8 @@ module Homebrew
         return unless MacOS::Xcode.installed?
         return unless MacOS::Xcode.outdated?
 
-        # CI images are going to end up outdated so don't complain.
-        return if ENV["TRAVIS"] || ENV["CIRCLECI"]
+        # Travis CI images are going to end up outdated so don't complain.
+        return if ENV["TRAVIS"]
 
         message = <<-EOS.undent
           Your Xcode (#{MacOS::Xcode.version}) is outdated.