diff --git a/src/test/java/org/json/junit/JSONMLTest.java b/src/test/java/org/json/junit/JSONMLTest.java
index 84b33ba..3687fe5 100644
--- a/src/test/java/org/json/junit/JSONMLTest.java
+++ b/src/test/java/org/json/junit/JSONMLTest.java
@@ -803,4 +803,30 @@ public void testToJSONObject_reversibility() {
 //
 //        assertEquals(expectedJsonString, actualJsonString);
 //    }
+    
+    @Test (timeout = 6000)
+    public void testIssue484InfinteLoop1() {
+        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());
+        }
+    }
+    
+    @Test (timeout = 6000)
+    public void testIssue484InfinteLoop2() {
+        try {
+            String input = "??*\n" + 
+                    "??|?CglR??`??>?w??PIlr??D?$?-?o??O?*??{OD?Y??`2a????NM?bq?:O?>S$?J?B.gUK?m\b??zE???!v]?
???
???c??????h???s???g???`?qbi??:Zl?)?}1^??k?0??:$V?$?Ovs(}J??????2;gQ?
???Tg?K?`?h%c?hmGA?<!C*?9?~?t?)??,zA???S}?Q??.q?j????]";
+         JSONML.toJSONObject(input);
+            fail("Exception expected for invalid JSON.");
+        } catch (JSONException ex) {
+            assertEquals("Exception string did not match: ",
+                    "Unterminated string at 242 [character 238 line 2]",
+                    ex.getMessage());
+        }
+    }
 }