diff --git a/java-numbers-3/src/test/java/com/baeldung/doubletolong/DoubleToLongUnitTest.java b/java-numbers-3/src/test/java/com/baeldung/doubletolong/DoubleToLongUnitTest.java
index e98201d3f0..702c59c12b 100644
--- a/java-numbers-3/src/test/java/com/baeldung/doubletolong/DoubleToLongUnitTest.java
+++ b/java-numbers-3/src/test/java/com/baeldung/doubletolong/DoubleToLongUnitTest.java
@@ -13,7 +13,7 @@ public class DoubleToLongUnitTest {
     }
 
     @Test
-    public void givenDoubleValue_whenMathRoundUsed_thenLongValueReturned() {
+    public void givenDoubleValue_whenMathRoundUsed_thenRoundUp() {
         Assert.assertEquals(10000L, Math.round(VALUE));
     }
 
@@ -22,6 +22,11 @@ public class DoubleToLongUnitTest {
         Assert.assertEquals(9999L, Math.round(9999.444));
     }
 
+    @Test
+    public void givenDoubleValue_whenMathRoundUsed_thenSameValueReturned() {
+        Assert.assertEquals(9999L, Math.round(9999.0));
+    }
+
     @Test
     public void givenDoubleValue_whenMathCeilUsed_thenLongValueReturned() {
         Assert.assertEquals(10000L, Math.ceil(VALUE), 0);
@@ -47,6 +52,11 @@ public class DoubleToLongUnitTest {
         Assert.assertEquals(9999L, Math.floor(9999.0), 0);
     }
 
+    @Test
+    public void givenDoubleValue_whenMathFloorUsed_thenDifferentThanCeil() {
+        Assert.assertEquals(9999L, Math.floor(9999.444), 0);
+    }
+
     @Test
     public void givenDoubleValue_whenTypeCasted_thenLongValueReturned() {
         Assert.assertEquals(9999L, (long) VALUE);