diff -r f5200d90b730 -r ff14ad07bc16 rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java
--- a/rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java	Thu Oct 30 01:50:21 2014 +0100
+++ b/rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java	Thu Oct 30 16:45:20 2014 +0100
@@ -126,7 +126,9 @@
         "xhr.send();\n" +
         "var ret = []\n" +
         "for (var i = 0; i < xhr.responseText.length; i++) {\n" +
-        "  ret.push(xhr.responseText.charCodeAt(i) & 0xff);\n" +
+        "  var b = xhr.responseText.charCodeAt(i) & 0xff;\n" +
+        "  if (b > 127) b -= 256;\n" +
+        "  ret.push(b);\n" +
         "}\n" +
         "return ret;\n"
     )