diff --git a/ci/travis.rb b/ci/travis.rb
index eb2890ca70..bb87c8f4ad 100755
--- a/ci/travis.rb
+++ b/ci/travis.rb
@@ -152,6 +152,7 @@ results = {}
 ENV["GEM"].split(",").each do |gem|
   [false, true].each do |isolated|
     next if ENV["TRAVIS_PULL_REQUEST"] && ENV["TRAVIS_PULL_REQUEST"] != "false" && isolated
+    next if RUBY_VERSION < "2.4" && isolated
     next if gem == "railties" && isolated
     next if gem == "ac" && isolated
     next if gem == "ac:integration" && isolated