diff --git a/core-java-modules/core-java-datetime-string-2/src/test/java/com/baeldung/formatduration/FormatDurationUnitTest.java b/core-java-modules/core-java-datetime-string-2/src/test/java/com/baeldung/formatduration/FormatDurationUnitTest.java
index 715250b9f821..32e3697f3402 100644
--- a/core-java-modules/core-java-datetime-string-2/src/test/java/com/baeldung/formatduration/FormatDurationUnitTest.java
+++ b/core-java-modules/core-java-datetime-string-2/src/test/java/com/baeldung/formatduration/FormatDurationUnitTest.java
@@ -13,7 +13,7 @@ public class FormatDurationUnitTest {
 
 
     @Test
-    public void givenInterval_WhenFormatInterval_formatDuration() {
+    public void givenInterval_whenFormatInterval_thenFormatDuration() {
         long HH = TimeUnit.MILLISECONDS.toHours(38114000);
         long MM = TimeUnit.MILLISECONDS.toMinutes(38114000) % 60;
         long SS = TimeUnit.MILLISECONDS.toSeconds(38114000) % 60;
@@ -23,7 +23,16 @@ public void givenInterval_WhenFormatInterval_formatDuration() {
     }
 
     @Test
-    public void givenInterval_WhenFormatUsingDuration_formatDuration() {
+    public void givenIntMinutes_whenConvertUsingTimeUnit_thenFormatHHMM() {
+        int totalMinutes = 155;  
+        long hours = TimeUnit.MINUTES.toHours(totalMinutes); 
+        long remainingMinutes = totalMinutes - TimeUnit.HOURS.toMinutes(hours);
+        String timeInHHMM = String.format("%02d:%02d", hours, remainingMinutes);
+        assertThat(timeInHHMM).isEqualTo("02:35");  
+    }
+
+    @Test
+    public void givenInterval_whenFormatUsingDuration_thenFormatDuration() {
         Duration duration = Duration.ofMillis(38114000);
         long seconds = duration.getSeconds();
         long HH = seconds / 3600;
@@ -32,16 +41,15 @@ public void givenInterval_WhenFormatUsingDuration_formatDuration() {
         String timeInHHMMSS =  String.format("%02d:%02d:%02d", HH, MM, SS);
         assertThat(timeInHHMMSS).isEqualTo("10:35:14");
     }
-
-
+    
     @Test
-    public void givenInterval_WhenFormatDurationUsingApacheCommons_formatDuration() {
+    public void givenInterval_whenFormatDurationUsingApacheCommons_thenFormatDuration() {
         assertThat(DurationFormatUtils.formatDuration(38114000, "HH:mm:ss"))
           .isEqualTo("10:35:14");
     }
 
     @Test
-    public void givenInterval_WhenFormatDurationUsingJodaTime_formatDuration() {
+    public void givenInterval_whenFormatDurationUsingJodaTime_thenFormatDuration() {
         org.joda.time.Duration duration = new org.joda.time.Duration(38114000);
         Period period = duration.toPeriod();
         long HH = period.getHours();