diff --git a/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java b/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
index 73041dd01..b0844bb38 100644
--- a/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/UnmodifiableSortedMapTest.java
@@ -84,8 +84,8 @@ public class UnmodifiableSortedMapTest<K, V> extends AbstractSortedMapTest<K, V>
     public void testHeadMap() {
         final SortedMap<K, V> map = makeFullMap();
         final SortedMap<K, V> m = new TreeMap<>();
-        //again is the first key of the map
-        assertSame(m.isEmpty(), map.headMap((K)"again").isEmpty());
+        // "again" is the first key of the map
+        assertSame(m.isEmpty(), map.headMap((K) "again").isEmpty());
     }
 
     //-----------------------------------------------------------------------