diff --git a/lib/rexml/functions.rb b/lib/rexml/functions.rb
index 0f91fcd23f..b0029660fa 100644
--- a/lib/rexml/functions.rb
+++ b/lib/rexml/functions.rb
@@ -186,9 +186,12 @@ module REXML
       rv
     end
 
-    # UNTESTED
     def Functions::concat( *objects )
-      objects.join
+      concatenated = ""
+      objects.each do |object|
+        concatenated << string(object)
+      end
+      concatenated
     end
 
     # Fixed by Mike Stok
diff --git a/test/rexml/test_jaxen.rb b/test/rexml/test_jaxen.rb
index 671c185ea5..014db69fdf 100644
--- a/test/rexml/test_jaxen.rb
+++ b/test/rexml/test_jaxen.rb
@@ -30,7 +30,7 @@ module REXMLTests
     def _test_numbers ; process_test_case("numbers") ; end
     def test_pi ; process_test_case("pi") ; end
     def _test_pi2 ; process_test_case("pi2") ; end
-    def _test_simple ; process_test_case("simple") ; end
+    def test_simple ; process_test_case("simple") ; end
     def _test_testNamespaces ; process_test_case("testNamespaces") ; end
     def _test_text ; process_test_case("text") ; end
     def _test_underscore ; process_test_case("underscore") ; end