diff --git a/main/tests/server/src/com/google/refine/tests/expr/functions/strings/ToFromConversionTests.java b/main/tests/server/src/com/google/refine/tests/expr/functions/strings/ToFromConversionTests.java
index 330fb3149..8abcd7abc 100644
--- a/main/tests/server/src/com/google/refine/tests/expr/functions/strings/ToFromConversionTests.java
+++ b/main/tests/server/src/com/google/refine/tests/expr/functions/strings/ToFromConversionTests.java
@@ -111,17 +111,26 @@ public class ToFromConversionTests extends RefineTest {
 
     @Test
     public void testToString() throws CalendarParserException {
-//      Assert.assertTrue(invoke("toString") instanceof EvalError);
-//      Assert.assertEquals(invoke("toString", (Object) null), "null");
-//      Assert.assertEquals(invoke("toString", Long.valueOf(100)),"100");
-//      Assert.assertEquals(invoke("toString", Double.valueOf(100.0)),"100.0");
-//      Assert.assertEquals(invoke("toString", Double.valueOf(100.0),"%.0f"),"100");
-//      
-      String intputDate = "2013-06-01";
-//      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(intputDate)), 
-//              "01-Jun-2013");
-      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(intputDate), "yyyy-MM-dd"),
+      Assert.assertTrue(invoke("toString") instanceof EvalError);
+      Assert.assertEquals(invoke("toString", (Object) null), "null");
+      Assert.assertEquals(invoke("toString", Long.valueOf(100)),"100");
+      Assert.assertEquals(invoke("toString", Double.valueOf(100.0)),"100.0");
+      Assert.assertEquals(invoke("toString", Double.valueOf(100.0),"%.0f"),"100");
+      
+      String inputDate = "2013-06-01";
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDate)), 
+              "01-Jun-2013");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDate), "yyyy-MM-dd"),
               "2013-06-01");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDate), "yyyy/dd/MM"), "2013/01/06");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDate), "yyyy-MMM"), "2013-Jun");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDate), "yyyy-MM-dd hh:mm:ss"), "2013-06-01 12:00:00");
+      
+      String inputDateTime = "2013-06-01 13:12:11";
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDateTime)), "01-Jun-2013");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDateTime), "yyyy-MM-dd"), "2013-06-01");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDateTime), "yyyy-MM-dd hh:mm:ss"),"2013-06-01 01:12:11");
+      Assert.assertEquals(invoke("toString", CalenderParser.parseAsOffsetDateTime(inputDateTime), "yyyy-MM-dd HH:mm:ss"),"2013-06-01 13:12:11");
     }
     
     @Test