diff --git a/common/unsafe/src/test/java/org/apache/spark/unsafe/PlatformUtilSuite.java b/common/unsafe/src/test/java/org/apache/spark/unsafe/PlatformUtilSuite.java
index 08ae65290e151..8269305157312 100644
--- a/common/unsafe/src/test/java/org/apache/spark/unsafe/PlatformUtilSuite.java
+++ b/common/unsafe/src/test/java/org/apache/spark/unsafe/PlatformUtilSuite.java
@@ -139,7 +139,8 @@ public void memoryDebugFillEnabledInTest() {
   @Test
   public void heapMemoryReuse() {
     MemoryAllocator heapMem = new HeapMemoryAllocator();
-    // The size is less than `HeapMemoryAllocator.POOLING_THRESHOLD_BYTES`,allocate new memory every time.
+    // The size is less than `HeapMemoryAllocator.POOLING_THRESHOLD_BYTES`,
+    // allocate new memory every time.
     MemoryBlock onheap1 = heapMem.allocate(513);
     Object obj1 = onheap1.getBaseObject();
     heapMem.free(onheap1);