diff --git a/src/org/jruby/java/proxies/ArrayJavaProxy.java b/src/org/jruby/java/proxies/ArrayJavaProxy.java
index c0bea32..a2ba494 100644
--- a/src/org/jruby/java/proxies/ArrayJavaProxy.java
+++ b/src/org/jruby/java/proxies/ArrayJavaProxy.java
@@ -133,6 +133,11 @@ public class ArrayJavaProxy extends JavaProxy {
         RubyModule javaArrayUtilities = context.getRuntime().getJavaSupport().getJavaArrayUtilitiesModule();
         return RuntimeHelpers.invoke(context, javaArrayUtilities, "java_to_ruby", this);
     }
+
+    @JRubyMethod
+    public IRubyObject to_s(ThreadContext context) {
+        return getJavaArray().to_s();
+    }

     public IRubyObject getRange(ThreadContext context, IRubyObject[] args) {
         if (args.length == 1) {
diff --git a/test/test_io.rb b/test/test_io.rb
index 4ab183d..77a2129 100644
--- a/test/test_io.rb
+++ b/test/test_io.rb
@@ -484,11 +484,11 @@ class TestIO < Test::Unit::TestCase
   unless WINDOWS
     def test_sh_used_appropriately
       # should not use sh
-      p, o, i, e = IO.popen4("/bin/ps -a -f")
-      assert_match p.to_s, i.read.lines.grep(/\/bin\/ps/).first
+      p, o, i, e = IO.popen4("/bin/ps -a -x -f")
+      assert_match p.to_s, i.read.lines.grep(/\/bin\/ps -a -x -f/).first

       # should use sh
-      p, o, i, e = IO.popen4("/bin/ps -a -f | grep ps'")
+      p, o, i, e = IO.popen4("/bin/ps -a -x -f | grep [/]bin/ps'")
       assert_no_match Regexp.new(p.to_s), i.read.grep(/\/bin\/ps/).first
     end
   end