diff --git a/src/test/java/org/json/junit/JSONMLTest.java b/src/test/java/org/json/junit/JSONMLTest.java
index 84b33ba..26f4f90 100644
--- a/src/test/java/org/json/junit/JSONMLTest.java
+++ b/src/test/java/org/json/junit/JSONMLTest.java
@@ -803,4 +803,16 @@ public class JSONMLTest {
 //
 //        assertEquals(expectedJsonString, actualJsonString);
 //    }
+    
+    @Test (timeout = 6000)
+    public void testIssue484InfinteLoop() {
+        try {
+            JSONML.toJSONObject("??*^M??|?CglR^F??`??>?w??PIlr^E??D^X^]?$?-^R?o??O?*??{OD?^FY??`2a????NM?b^Tq?:O?>S$^K?J?^FB.gUK?m^H??zE??^??!v]?^A???^[^A??^U?c??????h???s???g^Z???`?q^Dbi??:^QZl?)?}1^??k?0??:$V?$?Ovs(}J??^V????2;^QgQ?^_^A?^D?^U?Tg?K?`?h%c?hmGA?<!C*^P^Y?^X9?~?t?)??,z^XA???S}?Q??.q?j????]");
+            fail("Exception expected for invalid JSON.");
+        } catch (JSONException ex) {
+            assertEquals("Exception string did not match: ",
+                    "Unterminated string at 271 [character 272 line 1]",
+                    ex.getMessage());
+        }
+    }
 }