diff --git a/test/test_helper.rb b/test/test_helper.rb
index 55650ede..555105f7 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,6 +1,9 @@
 # frozen_string_literal: true
 
-if RUBY_VERSION >= "3.1"
+# Report test coverage to coveralls for only one Ruby version to avoid
+# repeated builds. This also accounts for coveralls_reborn requiring
+# RUBY_VERSION >= 2.5.
+if RUBY_VERSION.start_with?("3.1")
   require "coveralls"
   Coveralls.wear!
 end