diff --git a/test/rake/support/ruby_runner.rb b/test/rake/support/ruby_runner.rb
index 404e61a668..d51dd24b89 100644
--- a/test/rake/support/ruby_runner.rb
+++ b/test/rake/support/ruby_runner.rb
@@ -18,12 +18,13 @@ module RubyRunner
   def run_ruby(option_list)
     puts "COMMAND: [#{RUBY} #{option_list.join ' '}]" if @verbose
 
-    inn, out, err, wait = Open3.popen3(RUBY, *option_list)
-    inn.close
+    Open3.popen3(RUBY, *option_list) {|inn, out, err, wait|
+      inn.close
 
-    @exit = wait ? wait.value : $?
-    @out = out.read
-    @err = err.read
+      @exit = wait ? wait.value : $?
+      @out = out.read
+      @err = err.read
+    }
 
     puts "OUTPUT:  [#{@out}]" if @verbose
     puts "ERROR:   [#{@err}]" if @verbose