diff --git a/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java b/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java
index 84aac76b7e..7b46b37e38 100644
--- a/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java
+++ b/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java
@@ -9,7 +9,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
-import java.util.stream.LongStream;
 
 import org.junit.jupiter.api.Test;
 
@@ -40,36 +39,40 @@ public class CalculatePercentileUnitTest {
             .collect(Collectors.toList());
         Collections.shuffle(list100);
 
+        assertEquals(1, getPercentile(list100, 0));
         assertEquals(10, getPercentile(list100, 10));
         assertEquals(25, getPercentile(list100, 25));
         assertEquals(50, getPercentile(list100, 50));
         assertEquals(76, getPercentile(list100, 75.3));
+        assertEquals(100, getPercentile(list100, 100));
 
         List<Integer> list8 = IntStream.of(-1, 200, 30, 42, -5, 7, 8, 92)
             .boxed()
             .collect(Collectors.toList());
 
+        assertEquals(-5, getPercentile(list8, 0));
         assertEquals(-5, getPercentile(list8, 10));
         assertEquals(-1, getPercentile(list8, 25));
         assertEquals(8, getPercentile(list8, 50));
         assertEquals(92, getPercentile(list8, 75.3));
+        assertEquals(200, getPercentile(list8, 100));
     }
 
     @Test
     void whenCallingGetPercentileWithAnArray_thenGetExpectedResult() {
 
-        //prepare the input array
-        long[] theArray = LongStream.of(-1, 200, 30, 42, -5, 7, 8, 92)
-            .toArray();
+        long[] theArray = new long[] { -1, 200, 30, 42, -5, 7, 8, 92 };
 
         //convert the long[] array to a List<Long>
         List<Long> list8 = Arrays.stream(theArray)
             .boxed()
             .toList();
 
+        assertEquals(-5, getPercentile(list8, 0));
         assertEquals(-5, getPercentile(list8, 10));
         assertEquals(-1, getPercentile(list8, 25));
         assertEquals(8, getPercentile(list8, 50));
         assertEquals(92, getPercentile(list8, 75.3));
+        assertEquals(200, getPercentile(list8, 100));
     }
 }
\ No newline at end of file