diff --git a/metrics/pom.xml b/metrics/pom.xml
index 40a1d95d0c..a8f5e113e8 100644
--- a/metrics/pom.xml
+++ b/metrics/pom.xml
@@ -88,7 +88,7 @@
         <micrometer-registry-atlas.version>1.11.0</micrometer-registry-atlas.version>
         <spring-boot-starter-web.version>3.1.0</spring-boot-starter-web.version>
         <metrics-aspectj-deps.version>1.2.0</metrics-aspectj-deps.version>
-        <spectator-api.version>1.5.4</spectator-api.version>
+        <spectator-api.version>1.7.7</spectator-api.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/metrics/src/test/java/com/baeldung/metrics/micrometer/MicrometerAtlasManualTest.java b/metrics/src/test/java/com/baeldung/metrics/micrometer/MicrometerAtlasManualTest.java
index 8341befb83..7521aabdbb 100644
--- a/metrics/src/test/java/com/baeldung/metrics/micrometer/MicrometerAtlasManualTest.java
+++ b/metrics/src/test/java/com/baeldung/metrics/micrometer/MicrometerAtlasManualTest.java
@@ -282,7 +282,7 @@ public class MicrometerAtlasManualTest {
         Map<Double, Double> expectedMicrometer = new TreeMap<>();
         expectedMicrometer.put(2.5E7,1D);
         expectedMicrometer.put(3.0E8,1D);
-        expectedMicrometer.put(6.0E8,4D);
+        expectedMicrometer.put(6.0E8,1D);
 
         Map<Double, Double> actualMicrometer = new TreeMap<>();
         HistogramSnapshot snapshot = timer.takeSnapshot();
diff --git a/metrics/src/test/java/com/baeldung/metrics/servo/MetricAnnotationManualTest.java b/metrics/src/test/java/com/baeldung/metrics/servo/MetricAnnotationManualTest.java
index 2f908531f6..c2c1f52365 100644
--- a/metrics/src/test/java/com/baeldung/metrics/servo/MetricAnnotationManualTest.java
+++ b/metrics/src/test/java/com/baeldung/metrics/servo/MetricAnnotationManualTest.java
@@ -8,6 +8,7 @@ import com.netflix.servo.monitor.Monitors;
 import com.netflix.servo.tag.BasicTag;
 import com.netflix.servo.tag.BasicTagList;
 import com.netflix.servo.tag.TagList;
+import org.junit.Before;
 import org.junit.Test;
 
 import java.util.Iterator;
@@ -24,6 +25,12 @@ import static org.junit.Assert.assertTrue;
 
 public class MetricAnnotationManualTest extends MetricTestBase {
 
+    static {
+        System.setProperty(
+            "com.netflix.servo.DefaultMonitorRegistry.registryClass",
+            "com.netflix.servo.jmx.JmxMonitorRegistry");
+    }
+
     @Monitor(name = "integerCounter", type = DataSourceType.COUNTER, description = "Total number of update operations.")
     private final AtomicInteger updateCount = new AtomicInteger(0);
 
diff --git a/metrics/src/test/java/com/baeldung/metrics/servo/MetricObserverManualTest.java b/metrics/src/test/java/com/baeldung/metrics/servo/MetricObserverManualTest.java
index 3bb421b3ef..af60623841 100644
--- a/metrics/src/test/java/com/baeldung/metrics/servo/MetricObserverManualTest.java
+++ b/metrics/src/test/java/com/baeldung/metrics/servo/MetricObserverManualTest.java
@@ -24,6 +24,12 @@ import static org.junit.Assert.assertThat;
 
 public class MetricObserverManualTest extends MetricTestBase {
 
+    static {
+        System.setProperty(
+            "com.netflix.servo.DefaultMonitorRegistry.registryClass",
+            "com.netflix.servo.jmx.JmxMonitorRegistry");
+    }
+
     @Test
     public void givenMetrics_whenRegister_thenMonitored() throws InterruptedException {
         Gauge<Double> gauge = new BasicGauge<>(MonitorConfig