diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index b2e2e7bb6c..191c0c2278 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -861,7 +861,7 @@ class TestRubyOptions < Test::Unit::TestCase
         FileUtils.mkpath(File.join(dir, File.dirname(cmd)))
         File.write(File.join(dir, cmd), SEGVTest::KILL_SELF+"\n")
         c = Regexp.quote(cmd)
-        list = list.map {|re| Regexp.new(re.source.gsub(/-e/) {c}, re.options)}
+        list = list.map {|re| Regexp.new(re.source.gsub(/^\s*(\(\?:)?\K-e(?=:)/) {c}, re.options)}
       else
         cmd = ['-e', SEGVTest::KILL_SELF]
       end