diff --git a/src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java b/src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java
index 1fc92ca33..dd78b49dd 100644
--- a/src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java
@@ -526,7 +526,7 @@ public class DurationFormatUtilsTest extends AbstractLangTest {
      */
     @Test
     public void testFourYears() {
-        Calendar c = Calendar.getInstance();
+        final Calendar c = Calendar.getInstance();
         c.set(2004, 0, 1, 0, 0, 0);
         for (int i = 0; i < FOUR_YEARS; i++) {
             bruteForce(c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH), "d", Calendar.DAY_OF_MONTH);