diff --git a/lib/capybara/server.rb b/lib/capybara/server.rb
index 38707072..cc6a47c6 100644
--- a/lib/capybara/server.rb
+++ b/lib/capybara/server.rb
@@ -71,8 +71,7 @@ module Capybara
         end
       end
     rescue TimeoutError
-      puts "Rack application timed out during boot"
-      exit
+      raise "Rack application timed out during boot"
     else
       self
     end