diff --git a/pom.xml b/pom.xml
index 272938727..620137c77 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
     <jenkins.version>2.387.3</jenkins.version>
 
     <prometheus.simpleclient.version>0.16.0</prometheus.simpleclient.version>
-    <slf4j.version>2.0.12</slf4j.version>
+    <slf4j.version>2.0.13</slf4j.version>
 
     <cloudbees-disk-usage-simple.version>203.v3f46a_7462b_1a_</cloudbees-disk-usage-simple.version>
     <coverage.version>1.10.0</coverage.version>
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/DiskUsageCollector.java b/src/main/java/org/jenkinsci/plugins/prometheus/DiskUsageCollector.java
index 8236b391b..d5ce11669 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/DiskUsageCollector.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/DiskUsageCollector.java
@@ -37,7 +37,7 @@ public List<MetricFamilySamples> collect() {
         } catch (final IOException | RuntimeException e) {
             LOGGER.warn("Failed to get disk usage data due to an unexpected error.", e);
             return Collections.emptyList();
-        } catch (final java.lang.NoClassDefFoundError e) {
+        } catch (final NoClassDefFoundError e) {
             LOGGER.warn("Cannot collect disk usage data because plugin CloudBees Disk Usage Simple is not installed: {}", e.toString());
             LOGGER.info("You can remove this warning if you disable Collect Disk Usage in Prometheus Configuration.");
             return Collections.emptyList();
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/ExecutorCollector.java b/src/main/java/org/jenkinsci/plugins/prometheus/ExecutorCollector.java
index 1ddfbd793..137376fab 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/ExecutorCollector.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/ExecutorCollector.java
@@ -19,9 +19,6 @@ public class ExecutorCollector extends Collector {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(ExecutorCollector.class);
 
-    public ExecutorCollector() {
-    }
-
     @Override
     public List<MetricFamilySamples> collect() {
         LOGGER.debug("Collecting executor metrics for prometheus");
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/JobCollector.java b/src/main/java/org/jenkinsci/plugins/prometheus/JobCollector.java
index 6e494c600..a35db0b66 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/JobCollector.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/JobCollector.java
@@ -25,6 +25,9 @@ public class JobCollector extends Collector {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(JobCollector.class);
 
+    private final BuildMetrics lastBuildMetrics = new BuildMetrics("last");
+    private final BuildMetrics perBuildMetrics = new BuildMetrics("");
+
     private MetricCollector<Run<?, ?>, ? extends Collector> summary;
     private MetricCollector<Job<?, ?>, ? extends Collector> jobHealthScoreGauge;
     private MetricCollector<Job<?, ?>, ? extends Collector> nbBuildsGauge;
@@ -65,11 +68,6 @@ public void initCollectors(String[] labelNameArray) {
         }
     }
 
-    private final BuildMetrics lastBuildMetrics = new BuildMetrics("last");
-    private final BuildMetrics perBuildMetrics = new BuildMetrics("");
-
-    public JobCollector() {}
-
     @Override
     public List<MetricFamilySamples> collect() {
         LOGGER.debug("Collecting metrics for prometheus");
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildCollectorFactory.java b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildCollectorFactory.java
index 9888c20f5..692563760 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildCollectorFactory.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildCollectorFactory.java
@@ -9,10 +9,6 @@
 
 public class BuildCollectorFactory extends BaseCollectorFactory {
 
-    public BuildCollectorFactory() {
-        super();
-    }
-
     public MetricCollector<Run<?, ?>, ? extends Collector> createCollector(CollectorType type, String[] labelNames, String prefix) {
         switch (type) {
             case BUILD_DURATION_GAUGE:
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/disk/DiskCollectorFactory.java b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/disk/DiskCollectorFactory.java
index 947b1b366..c26a5c7cd 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/disk/DiskCollectorFactory.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/disk/DiskCollectorFactory.java
@@ -15,10 +15,6 @@
 
 public class DiskCollectorFactory extends BaseCollectorFactory {
 
-    public DiskCollectorFactory() {
-        super();
-    }
-
     public MetricCollector<DiskItem, ? extends Collector> createDiskItemCollector(CollectorType type, String[] labelNames) {
         if (Objects.requireNonNull(type) == DISK_USAGE_BYTES_GAUGE) {
             return saveBuildCollector(new DiskUsageBytesGauge(labelNames, namespace, subsystem));
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/executors/ExecutorCollectorFactory.java b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/executors/ExecutorCollectorFactory.java
index 47e6c871c..80d341ce8 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/executors/ExecutorCollectorFactory.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/executors/ExecutorCollectorFactory.java
@@ -9,10 +9,6 @@
 
 public class ExecutorCollectorFactory extends BaseCollectorFactory {
 
-    public ExecutorCollectorFactory() {
-        super();
-    }
-
     public MetricCollector<LoadStatistics.LoadStatisticsSnapshot, ? extends Collector> createCollector(CollectorType type, String[] labelNames, String prefix) {
         switch (type) {
             case EXECUTORS_AVAILABLE_GAUGE:
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jenkins/JenkinsCollectorFactory.java b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jenkins/JenkinsCollectorFactory.java
index f6af9a2f2..f568130b8 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jenkins/JenkinsCollectorFactory.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jenkins/JenkinsCollectorFactory.java
@@ -13,10 +13,6 @@
  */
 public class JenkinsCollectorFactory extends BaseCollectorFactory {
 
-    public JenkinsCollectorFactory() {
-        super();
-    }
-
     public MetricCollector<Jenkins, ? extends Collector> createCollector(CollectorType type, String[] labelNames) {
         switch (type) {
             case JENKINS_UP_GAUGE:
diff --git a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jobs/JobCollectorFactory.java b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jobs/JobCollectorFactory.java
index 276e354a8..966ded5f5 100644
--- a/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jobs/JobCollectorFactory.java
+++ b/src/main/java/org/jenkinsci/plugins/prometheus/collectors/jobs/JobCollectorFactory.java
@@ -9,10 +9,6 @@
 
 public class JobCollectorFactory extends BaseCollectorFactory {
 
-    public JobCollectorFactory() {
-        super();
-    }
-
     public MetricCollector<Job<?, ?>, ? extends Collector> createCollector(CollectorType type, String[] labelNames) {
         switch (type) {
             case HEALTH_SCORE_GAUGE:
diff --git a/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildLikelyStuckGaugeTest.java b/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildLikelyStuckGaugeTest.java
index 314cab584..fbef6d78c 100644
--- a/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildLikelyStuckGaugeTest.java
+++ b/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/BuildLikelyStuckGaugeTest.java
@@ -31,7 +31,7 @@ public void testNothingCalculatedWhenRunIsNull() {
 
     @Test
     public void testNothingCalculatedWhenJobIsNotBuilding() {
-        Mockito.when(mock.isBuilding()).thenReturn(false);
+        when(mock.isBuilding()).thenReturn(false);
 
         BuildLikelyStuckGauge sut = new BuildLikelyStuckGauge(getLabelNames(), getNamespace(), getSubSystem(), "");
 
@@ -46,8 +46,8 @@ public void testNothingCalculatedWhenJobIsNotBuilding() {
 
     @Test
     public void testNothingCalculatedWhenNoExecutorFound() {
-        Mockito.when(mock.isBuilding()).thenReturn(true);
-        Mockito.when(mock.getExecutor()).thenReturn(null);
+        when(mock.isBuilding()).thenReturn(true);
+        when(mock.getExecutor()).thenReturn(null);
 
         BuildLikelyStuckGauge sut = new BuildLikelyStuckGauge(getLabelNames(), getNamespace(), getSubSystem(), "");
 
@@ -61,10 +61,10 @@ public void testNothingCalculatedWhenNoExecutorFound() {
 
     @Test
     public void testBuildIsLikelyStuck() {
-        Mockito.when(mock.isBuilding()).thenReturn(true);
+        when(mock.isBuilding()).thenReturn(true);
         Executor mockedExecutor = mock(Executor.class);
         when(mockedExecutor.isLikelyStuck()).thenReturn(true);
-        Mockito.when(mock.getExecutor()).thenReturn(mockedExecutor);
+        when(mock.getExecutor()).thenReturn(mockedExecutor);
 
         BuildLikelyStuckGauge sut = new BuildLikelyStuckGauge(getLabelNames(), getNamespace(), getSubSystem(), "");
 
@@ -79,10 +79,10 @@ public void testBuildIsLikelyStuck() {
 
     @Test
     public void testBuildIsNotLikelyStuck() {
-        Mockito.when(mock.isBuilding()).thenReturn(true);
+        when(mock.isBuilding()).thenReturn(true);
         Executor mockedExecutor = mock(Executor.class);
         when(mockedExecutor.isLikelyStuck()).thenReturn(false);
-        Mockito.when(mock.getExecutor()).thenReturn(mockedExecutor);
+        when(mock.getExecutor()).thenReturn(mockedExecutor);
 
         BuildLikelyStuckGauge sut = new BuildLikelyStuckGauge(getLabelNames(), getNamespace(), getSubSystem(), "");
 
diff --git a/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/CounterManagerTest.java b/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/CounterManagerTest.java
index d1fa20f22..669a07d56 100644
--- a/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/CounterManagerTest.java
+++ b/src/test/java/org/jenkinsci/plugins/prometheus/collectors/builds/CounterManagerTest.java
@@ -3,8 +3,8 @@
 import org.jenkinsci.plugins.prometheus.collectors.CollectorType;
 import org.jenkinsci.plugins.prometheus.collectors.testutils.MockedRunCollectorTest;
 import org.jenkinsci.plugins.prometheus.config.PrometheusConfiguration;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 import org.mockito.MockedStatic;
 
 import java.util.Arrays;
@@ -12,7 +12,7 @@
 import static org.mockito.Mockito.*;
 
 public class CounterManagerTest extends MockedRunCollectorTest {
-    private CounterManager manager;
+    private final CounterManager manager;
 
     public CounterManagerTest() {
         manager = CounterManager.getManager();
@@ -31,7 +31,7 @@ public void TestEquivalentEntryReturnsCounter() {
 
             // Should be a value reference comparison. They should be the exact same
             // MetricCollector.
-            Assert.assertEquals(retrievedCounter, retrievedCounter2);
+            Assertions.assertEquals(retrievedCounter, retrievedCounter2);
         }
     }
 
@@ -52,7 +52,7 @@ public void TestNamespaceChangeReturnsNewCounter() {
             var retrievedCounter2 = manager.getCounter(CollectorType.BUILD_SUCCESSFUL_COUNTER, labels, null);
 
             // Should be a value reference comparison. They should not be the same metric since the namespace has changed.
-            Assert.assertNotEquals(retrievedCounter, retrievedCounter2);
+            Assertions.assertNotEquals(retrievedCounter, retrievedCounter2);
         }
     }
 
@@ -68,7 +68,7 @@ public void TestLabelChangeReturnsNewCounter(){
             var retrievedCounter2 = manager.getCounter(CollectorType.BUILD_SUCCESSFUL_COUNTER, label2, null);
 
             // Should be a value reference comparison. They should be different since labels differ.
-            Assert.assertNotEquals(retrievedCounter, retrievedCounter2);
+             Assertions.assertNotEquals(retrievedCounter, retrievedCounter2);
         }
     }
 
@@ -83,7 +83,7 @@ public void TestPrefixChangeReturnsNewCounter(){
             var retrievedCounter2 = manager.getCounter(CollectorType.BUILD_SUCCESSFUL_COUNTER, label1, null);
 
             // Should be a value reference comparison. They should not be the same since prefix changed
-            Assert.assertNotEquals(retrievedCounter, retrievedCounter2);
+             Assertions.assertNotEquals(retrievedCounter, retrievedCounter2);
         }
     }
 
@@ -98,7 +98,7 @@ public void TestDifferentCounterReturnsUniqueCounter(){
             var retrievedCounter2 = manager.getCounter(CollectorType.BUILD_SUCCESSFUL_COUNTER, label1, null);
 
             // Should be a value reference comparison. They should not be the same since the collector type differs.
-            Assert.assertNotEquals(retrievedCounter, retrievedCounter2);
+             Assertions.assertNotEquals(retrievedCounter, retrievedCounter2);
         }
     }
 
diff --git a/src/test/java/org/jenkinsci/plugins/prometheus/util/JenkinsNodeBuildsSampleBuilderTest.java b/src/test/java/org/jenkinsci/plugins/prometheus/util/JenkinsNodeBuildsSampleBuilderTest.java
index e38a830c0..c185d1757 100644
--- a/src/test/java/org/jenkinsci/plugins/prometheus/util/JenkinsNodeBuildsSampleBuilderTest.java
+++ b/src/test/java/org/jenkinsci/plugins/prometheus/util/JenkinsNodeBuildsSampleBuilderTest.java
@@ -10,7 +10,7 @@
 
 public class JenkinsNodeBuildsSampleBuilderTest {
     @Test
-    public void master_node_count_format() {
+    public void masterNodeCountFormat() {
         assertEquals(
                 new Collector.MetricFamilySamples.Sample(
                         "jenkins_node_builds_count",
@@ -29,7 +29,7 @@ public void master_node_count_format() {
     }
 
     @Test
-    public void master_node_histogram_format() {
+    public void masterNodeHistogramFormat() {
         assertEquals(
                 new Collector.MetricFamilySamples.Sample(
                         "jenkins_node_builds",
@@ -48,7 +48,7 @@ public void master_node_histogram_format() {
     }
 
     @Test
-    public void named_node_count_format() {
+    public void namedNodeCountFormat() {
         assertEquals(
                 new Collector.MetricFamilySamples.Sample(
                         "jenkins_node_builds_count",