diff --git a/metrics/src/test/java/com/baeldung/metrics/core/MetricsTest.java b/metrics/src/test/java/com/baeldung/metrics/core/MetricsTest.java
index 3301dcd96a..882cc6785f 100644
--- a/metrics/src/test/java/com/baeldung/metrics/core/MetricsTest.java
+++ b/metrics/src/test/java/com/baeldung/metrics/core/MetricsTest.java
@@ -16,14 +16,16 @@ public class MetricsTest {
     @Test
     public void whenMarkMeter_thenCorrectRates() throws InterruptedException {
         Meter meter = new Meter();
-
         long initCount = meter.getCount();
+
         assertThat(initCount, equalTo(0L));
 
         meter.mark();
+
         assertThat(meter.getCount(), equalTo(1L));
 
         meter.mark(20);
+
         assertThat(meter.getCount(), equalTo(21L));
 
         // not use assert for these rate values because they change every time when this test is run
@@ -40,6 +42,7 @@ public class MetricsTest {
     @Test
     public void whenInitRatioGauge_thenCorrectRatio() {
         Gauge<Double> ratioGauge = new AttendanceRatioGauge(15, 20);
+
         assertThat(ratioGauge.getValue(), equalTo(0.75));
     }
 
@@ -48,6 +51,7 @@ public class MetricsTest {
         Gauge<List<Long>> activeUsersGauge = new ActiveUsersGauge(15, TimeUnit.MINUTES);
         List<Long> expected = new ArrayList<Long>();
         expected.add(12L);
+
         assertThat(activeUsersGauge.getValue(), equalTo(expected));
     }
 
@@ -55,36 +59,42 @@ public class MetricsTest {
     public void whenUseDerivativeGauge_thenCorrectGaugeFromBase() {
         Gauge<List<Long>> activeUsersGauge = new ActiveUsersGauge(15, TimeUnit.MINUTES);
         Gauge<Integer> activeUserCountGauge = new ActiveUserCountGauge(activeUsersGauge);
+
         assertThat(activeUserCountGauge.getValue(), equalTo(1));
     }
 
     @Test
     public void whenIncDecCounter_thenCorrectCount() {
         Counter counter = new Counter();
-
         long initCount = counter.getCount();
+
         assertThat(initCount, equalTo(0L));
 
         counter.inc();
+
         assertThat(counter.getCount(), equalTo(1L));
 
         counter.inc(11);
+
         assertThat(counter.getCount(), equalTo(12L));
 
         counter.dec();
+
         assertThat(counter.getCount(), equalTo(11L));
 
         counter.dec(6);
+
         assertThat(counter.getCount(), equalTo(5L));
     }
 
     @Test
     public void whenUpdateHistogram_thenCorrectDistributionData() {
         Histogram histogram = new Histogram(new UniformReservoir());
-
         histogram.update(5);
         long count1 = histogram.getCount();
+
         assertThat(count1, equalTo(1L));
+
         Snapshot snapshot1 = histogram.getSnapshot();
         assertThat(snapshot1.getValues().length, equalTo(1));
         assertThat(snapshot1.getValues()[0], equalTo(5L));
@@ -101,8 +111,11 @@ public class MetricsTest {
 
         histogram.update(20);
         long count2 = histogram.getCount();
+
         assertThat(count2, equalTo(2L));
+
         Snapshot snapshot2 = histogram.getSnapshot();
+
         assertThat(snapshot2.getValues().length, equalTo(2));
         assertThat(snapshot2.getValues()[0], equalTo(5L));
         assertThat(snapshot2.getValues()[1], equalTo(20L));
@@ -121,11 +134,11 @@ public class MetricsTest {
     @Test
     public void whenUseTimer_thenCorrectTimerContexts() throws InterruptedException {
         Timer timer = new Timer();
-
         Timer.Context context1 = timer.time();
         TimeUnit.SECONDS.sleep(5);
 
         long elapsed1 = context1.stop();
+
         assertEquals(5000000000L, elapsed1, 1000000);
         assertThat(timer.getCount(), equalTo(1L));
         assertEquals(0.2, timer.getMeanRate(), 0.1);
@@ -133,6 +146,7 @@ public class MetricsTest {
         Timer.Context context2 = timer.time();
         TimeUnit.SECONDS.sleep(2);
         context2.close();
+
         assertThat(timer.getCount(), equalTo(2L));
         assertEquals(0.3, timer.getMeanRate(), 0.1);
     }
diff --git a/metrics/src/test/java/com/baeldung/metrics/healthchecks/HealthCheckTest.java b/metrics/src/test/java/com/baeldung/metrics/healthchecks/HealthCheckTest.java
index 99a3970761..b1b2cc2ff9 100644
--- a/metrics/src/test/java/com/baeldung/metrics/healthchecks/HealthCheckTest.java
+++ b/metrics/src/test/java/com/baeldung/metrics/healthchecks/HealthCheckTest.java
@@ -23,10 +23,13 @@ public class HealthCheckTest {
         assertThat(healthCheckRegistry.getNames().size(), equalTo(2));
 
         Map<String, HealthCheck.Result> results = healthCheckRegistry.runHealthChecks();
+
         assertFalse(results.isEmpty());
+
         results.forEach((k, v) -> assertTrue(v.isHealthy()));
 
         healthCheckRegistry.unregister("uc");
+
         assertThat(healthCheckRegistry.getNames().size(), equalTo(1));
     }
 }
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