diff --git a/apps/yms/ut/src/test/java/org/onosproject/yms/app/yob/YobDecimal64Test.java b/apps/yms/ut/src/test/java/org/onosproject/yms/app/yob/YobDecimal64Test.java
new file mode 100644
index 0000000..dbc27f1
--- /dev/null
+++ b/apps/yms/ut/src/test/java/org/onosproject/yms/app/yob/YobDecimal64Test.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yms.app.yob;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.onosproject.yms.app.ydt.YdtTestUtils;
+import org.onosproject.yms.app.ydt.YangRequestWorkBench;
+import org.onosproject.yms.app.ydt.YdtExtendedContext;
+import org.onosproject.yms.ydt.YdtContext;
+
+import java.lang.reflect.Field;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+public class YobDecimal64Test {
+
+    /*
+
+    Positive scenario
+
+    input at boundary for decimal64 with fraction 2
+        i. min value
+        ii. max value
+
+    input at boundary for decimal64 with minimum fraction
+        i. min value
+        ii. mid value
+        iii. max value
+
+    input at boundary for decimal64 with maximum fraction
+        i. min value
+        ii. mid value
+        iii. max value
+
+    input with in range
+        if range is 10 to 100 for integer
+            i.1. input 11
+            i.2. min value 10
+            i.3. max value 100
+
+    input with multi interval range
+        if range is 10..40 | 50..100 for decimal64
+            i.1. input 11
+            i.2. input 10
+            i.3. input 40
+            i.4. input 50
+            i.5. input 55
+            i.6. input 100
+
+        if range is "min .. 3.14 | 10 | 20..max" for decimal64
+            i.1. input min
+            i.2. input 2.505
+            i.3. input 3.14
+            i.4. input 10
+            i.5. input 20
+            i.6. input 92233720368547757
+            i.7. input 92233720368547758.07
+
+    */
+    @Test
+    public void positiveTest() {
+        YangRequestWorkBench defaultYdtBuilder = YdtTestUtils.decimal64Ydt();
+        validateYangObject(defaultYdtBuilder);
+    }
+
+    private void validateYangObject(YangRequestWorkBench defaultYdtBuilder) {
+
+        YdtContext rootCtx = defaultYdtBuilder.getRootNode();
+
+        YdtContext childCtx = rootCtx.getFirstChild();
+
+        DefaultYobBuilder builder = new DefaultYobBuilder();
+
+        Object yangObject = builder.getYangObject(
+                (YdtExtendedContext) childCtx, YdtTestUtils
+                        .getSchemaRegistry());
+        assertNotNull(yangObject);
+        try {
+            Field negInt = yangObject.getClass().getDeclaredField("negInt");
+            negInt.setAccessible(true);
+            assertEquals("-92233720368547758.08", negInt
+                    .get(yangObject).toString());
+            Field negIntWithMaxFraction = yangObject.getClass()
+                    .getDeclaredField("negIntWithMaxFraction");
+            negIntWithMaxFraction.setAccessible(true);
+            assertEquals("-9.223372036854775808", negIntWithMaxFraction
+                    .get(yangObject).toString());
+            Field negIntWithMinFraction = yangObject.getClass()
+                    .getDeclaredField("negIntWithMinFraction");
+            negIntWithMinFraction.setAccessible(true);
+            assertEquals("-922337203685477580.8", negIntWithMinFraction
+                    .get(yangObject).toString());
+            Field posInt = yangObject.getClass()
+                    .getDeclaredField("posInt");
+            posInt.setAccessible(true);
+            assertEquals("92233720368547758.07", posInt
+                    .get(yangObject).toString());
+            Field posIntWithMaxFraction = yangObject
+                    .getClass().getDeclaredField("posIntWithMaxFraction");
+            posIntWithMaxFraction.setAccessible(true);
+            assertEquals("9.223372036854775807", posIntWithMaxFraction
+                    .get(yangObject).toString());
+            Field posIntWithMinFraction = yangObject.getClass()
+                    .getDeclaredField("posIntWithMinFraction");
+            posIntWithMinFraction.setAccessible(true);
+            assertEquals("922337203685477580.7", posIntWithMinFraction
+                    .get(yangObject).toString());
+            Field minIntWithRange = yangObject.getClass()
+                    .getDeclaredField("minIntWithRange");
+            minIntWithRange.setAccessible(true);
+            assertEquals("10", minIntWithRange
+                    .get(yangObject).toString());
+            Field midIntWithRange = yangObject
+                    .getClass().getDeclaredField("midIntWithRange");
+            midIntWithRange.setAccessible(true);
+            assertEquals("11", midIntWithRange.get(yangObject).toString());
+            Field maxIntWithRange = yangObject
+                    .getClass().getDeclaredField("maxIntWithRange");
+            maxIntWithRange.setAccessible(true);
+            assertEquals("100", maxIntWithRange.get(yangObject).toString());
+        } catch (IllegalAccessException | NoSuchFieldException e) {
+            Assert.fail();
+        }
+    }
+}