diff --git a/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/TimeWindowMax.java b/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/TimeWindowMax.java
index de3d74756c..536cbb14a3 100644
--- a/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/TimeWindowMax.java
+++ b/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/TimeWindowMax.java
@@ -131,7 +131,7 @@ private void rotate() {
         try {
             synchronized (this) {
                 if (timeSinceLastRotateMillis >= durationBetweenRotatesMillis * ringBuffer.length) {
-                    // it past too many time since this instance was used, we can just cleare
+                    // time since last rotation is enough to clear whole ring buffer
                     for (AtomicLong bufferItem: ringBuffer) {
                         bufferItem.set(0);
                     }
diff --git a/micrometer-core/src/test/java/io/micrometer/core/instrument/distribution/TimeWindowMaxTest.java b/micrometer-core/src/test/java/io/micrometer/core/instrument/distribution/TimeWindowMaxTest.java
index 122ed36c31..a3e53470e7 100644
--- a/micrometer-core/src/test/java/io/micrometer/core/instrument/distribution/TimeWindowMaxTest.java
+++ b/micrometer-core/src/test/java/io/micrometer/core/instrument/distribution/TimeWindowMaxTest.java
@@ -22,7 +22,6 @@
 import java.util.concurrent.TimeUnit;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Tests for {@link TimeWindowMax}
@@ -48,24 +47,23 @@ void decaysToZero() {
     }
 
     @Test
-    void testLongPeriaOfInactivity() {
+    void testLongPeriodOfInactivity() {
         timeWindowMax = new TimeWindowMax(clock, 60_000, 3);
         timeWindowMax.record(32);
-        System.out.println(timeWindowMax.poll()); // prints 32
+        assertThat(timeWindowMax.poll()).isEqualTo(32); // 0 | 0 | 32
 
-        // emulate 12 hours of inactivity
         clock.add(Duration.ofHours(12));
-        assertEquals(0.0, timeWindowMax.poll());
+        assertThat(timeWindowMax.poll()).isZero(); // 0 | 0 | 0
 
         timeWindowMax.record(666);
-        assertEquals(666, timeWindowMax.poll());
+        assertThat(timeWindowMax.poll()).isEqualTo(666); // 0 | 0 | 666
 
         clock.add(Duration.ofSeconds(62));
         timeWindowMax.record(500);
-        assertEquals(666, timeWindowMax.poll());
+        assertThat(timeWindowMax.poll()).isEqualTo(666); // 0 | 666 | 500
 
         clock.add(Duration.ofSeconds(62));
         timeWindowMax.record(100500);
-        assertEquals(100500, timeWindowMax.poll());
+        assertThat(timeWindowMax.poll()).isEqualTo(100500); // 666 | 500 | 100500
     }
 }