diff --git a/src/test/java/features/Test5AggsSelect.java b/src/test/java/features/Test5AggsSelect.java
index aaa1cbe16597676dc0242043622322dd95b95fcc..f667a07e8e7e7e24fd4d14734b7e4c1dd356cfba 100644
--- a/src/test/java/features/Test5AggsSelect.java
+++ b/src/test/java/features/Test5AggsSelect.java
@@ -252,7 +252,7 @@ public class Test5AggsSelect {
 
   @Test
   public void test_histogram() throws Exception {
-    String tmp =
+    ONode oNode =
         context
             .indice(indice)
             .limit(0)
@@ -263,26 +263,30 @@ public class Test5AggsSelect {
                         h -> {
                           h.interval(2).offset(1);
                         }))
-            .selectJson();
+            .selectAggs();
 
-    System.out.println(tmp);
+    System.out.println(oNode.toJson());
+
+    assert (oNode.get("level_histogram").isObject());
   }
 
   @Test
   public void test_date_histogram() throws Exception {
-    String tmp =
-        context
-            .indice(indice)
-            .limit(0)
-            .aggs(
-                a ->
-                    a.dateHistogram(
-                        "log_fulltime",
-                        d -> {
-                          d.calendarInterval("1s").format("yyyy-MM-dd HH:mm:ss");
-                        }))
-            .selectJson();
 
-    System.out.println(tmp);
+    ONode oNode = context
+        .indice(indice)
+        .limit(0)
+        .aggs(
+            a ->
+                a.dateHistogram(
+                    "log_fulltime",
+                    d -> {
+                      d.calendarInterval("1s").format("yyyy-MM-dd HH:mm:ss");
+                    }))
+        .selectAggs();
+
+    System.out.println(oNode.toJson());
+
+    assert (oNode.get("log_fulltime_date_histogram").isObject());
   }
 }