1 files changed, 3 insertions, 0 deletions
diff --git a/basictest/runner.rb b/basictest/runner.rb
index 3a60036ffa..0330b6d506 100755
--- a/basictest/runner.rb
+++ b/basictest/runner.rb
@@ -17,6 +17,9 @@ $stderr.reopen($stdout)
 error = ''
 
 srcdir = File.expand_path('..', File.dirname(__FILE__))
+if opt = ENV["RUBYOPT"]
+  ENV["RUBYOPT"] = opt + " -W1"
+end
 `#{ruby} #{opt} -W1 #{srcdir}/basictest/test.rb #{ARGV.join(' ')}`.each_line do |line|
   if line =~ /^end of test/
     print "\ntest succeeded\n"