diff --git a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionNew.java b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionNew.java
index a2e9b6b..870b725 100644
--- a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionNew.java
+++ b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionNew.java
@@ -30,17 +30,51 @@
     };
 
     @Test
-    public void builderDate () throws IOException {
+    public void builderDateYear () throws IOException {
         CollectionBuilderNew kc = new CollectionBuilderNew();
         assertEquals("pubDate:[20050000 TO 20059999]",
                      kc.date("pubDate", "2005").toString());
     };
 
     @Test
+    public void builderDateMonth () throws IOException {
+        CollectionBuilderNew kc = new CollectionBuilderNew();
+        assertEquals("pubDate:[20051000 TO 20051099]",
+                     kc.date("pubDate", "2005-10").toString());
+    };
+
+    @Test
+    public void builderDateDay () throws IOException {
+        CollectionBuilderNew kc = new CollectionBuilderNew();
+        assertEquals("pubDate:20051011",
+                     kc.date("pubDate", "2005-10-11").toString());
+    };
+
+    @Test
+    public void builderDateBorders () throws IOException {
+        CollectionBuilderNew kc = new CollectionBuilderNew();
+        // CollectionBuilderNew.CollectionBuilderInterface kbi = ;
+        assertNull(kc.date("pubDate", ""));
+
+        assertEquals("pubDate:20051580",
+                     kc.date("pubDate", "2005-15-80").toString());
+
+        assertNull(kc.date("pubDate", "2005-15-8"));
+        assertNull(kc.date("pubDate", "2005-5-18"));
+        assertNull(kc.date("pubDate", "200-05-18"));
+    };
+
+    @Test
     public void builderSince () throws IOException {
         CollectionBuilderNew kc = new CollectionBuilderNew();
         assertEquals("pubDate:[20050000 TO 99999999]",
                      kc.since("pubDate", "2005").toString());
+
+        assertEquals("pubDate:[20051000 TO 99999999]",
+                     kc.since("pubDate", "2005-10").toString());
+
+        assertEquals("pubDate:[20051012 TO 99999999]",
+                     kc.since("pubDate", "2005-10-12").toString());
     };
 
 
@@ -49,6 +83,12 @@
         CollectionBuilderNew kc = new CollectionBuilderNew();
         assertEquals("pubDate:[0 TO 20059999]",
                      kc.till("pubDate", "2005").toString());
+
+        assertEquals("pubDate:[0 TO 20051299]",
+                     kc.till("pubDate", "2005-12").toString());
+
+        assertEquals("pubDate:[0 TO 20051204]",
+                     kc.till("pubDate", "2005-12-04").toString());
     };
 
 
@@ -141,4 +181,6 @@
         assertEquals("author:tree", kbi.toString());
         assertTrue(kbi.isNegative());
     };
+
+
 };