diff --git a/Gemfile b/Gemfile
index 2323d65..9d71912 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ require File.expand_path("on_what", File.dirname(__FILE__))
 source "https://rubygems.org"
 
 # Travis-only dependencies go here
-if on_travis? && !on_1_8? && !on_rubinius?
+if on_travis? && !on_less_than_2_3? && !on_rubinius?
   group :test do
     gem "codecov", ">= 0.0.9", :require => false
   end
diff --git a/on_what.rb b/on_what.rb
index e64625d..60a1794 100644
--- a/on_what.rb
+++ b/on_what.rb
@@ -24,3 +24,7 @@ end
 def on_less_than_2_0?
   RUBY_VERSION < "2.0.0"
 end
+
+def on_less_than_2_3?
+  RUBY_VERSION < "2.3.0"
+end