diff --git a/pom.xml b/pom.xml
index 0ac6ef5..7f3b5d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>edu.hm.hafner</groupId>
     <artifactId>codingstyle-pom</artifactId>
-    <version>3.42.0</version>
+    <version>4.0.1</version>
     <relativePath />
   </parent>
 
diff --git a/src/main/java/edu/hm/hafner/grading/AggregatedScore.java b/src/main/java/edu/hm/hafner/grading/AggregatedScore.java
index 1a150f6..059a25a 100644
--- a/src/main/java/edu/hm/hafner/grading/AggregatedScore.java
+++ b/src/main/java/edu/hm/hafner/grading/AggregatedScore.java
@@ -30,7 +30,7 @@
  * @author Eva-Maria Zeintl
  * @author Ullrich Hafner
  */
-@SuppressWarnings({"PMD.GodClass", "PMD.CyclomaticComplexity", "PMD.ExcessivePublicCount"})
+@SuppressWarnings({"PMD.GodClass", "PMD.CyclomaticComplexity", "PMD.ExcessivePublicCount", "PMD.CouplingBetweenObjects"})
 public final class AggregatedScore implements Serializable {
     @Serial
     private static final long serialVersionUID = 3L;
diff --git a/src/main/java/edu/hm/hafner/grading/AutoGradingRunner.java b/src/main/java/edu/hm/hafner/grading/AutoGradingRunner.java
index 2c3fe4e..d91898d 100644
--- a/src/main/java/edu/hm/hafner/grading/AutoGradingRunner.java
+++ b/src/main/java/edu/hm/hafner/grading/AutoGradingRunner.java
@@ -21,6 +21,8 @@
 public class AutoGradingRunner {
     private static final String SINGLE_LINE = "--------------------------------------------------------------------------------";
     private static final String DOUBLE_LINE = "================================================================================";
+    private static final int ERROR_CAPACITY = 1024;
+
     private final PrintStream outputStream;
 
     /**
@@ -154,7 +156,7 @@ protected void publishError(final AggregatedScore score, final FilteredLog log,
      */
     protected String createErrorMessageMarkdown(final FilteredLog log) {
         if (log.hasErrors()) {
-            var errors = new StringBuilder();
+            var errors = new StringBuilder(ERROR_CAPACITY);
 
             errors.append("## :construction: Error Messages\n```\n");
             var messages = new StringJoiner("\n");
@@ -184,7 +186,7 @@ private String readDefaultConfiguration() {
         var name = getDefaultConfigurationPath();
         try (var defaultConfig = AutoGradingRunner.class.getResourceAsStream(name)) {
             if (defaultConfig == null) {
-                throw new IOException("Can't find configuration in class path: " + name);
+                throw new IllegalStateException("Can't find configuration in class path: " + name);
             }
             return new String(defaultConfig.readAllBytes(), StandardCharsets.UTF_8);
         }
diff --git a/src/main/java/edu/hm/hafner/grading/CoverageConfiguration.java b/src/main/java/edu/hm/hafner/grading/CoverageConfiguration.java
index 1bac360..d337da1 100644
--- a/src/main/java/edu/hm/hafner/grading/CoverageConfiguration.java
+++ b/src/main/java/edu/hm/hafner/grading/CoverageConfiguration.java
@@ -76,7 +76,7 @@ public int getMissedPercentageImpact() {
      *         code coverage
      */
     public boolean isMutationCoverage() {
-        return StringUtils.containsAnyIgnoreCase(getId() + getName(), CoverageConfiguration.MUTATION_IDS);
+        return StringUtils.containsAnyIgnoreCase(getId() + getName(), MUTATION_IDS);
     }
 
     @Override
diff --git a/src/main/java/edu/hm/hafner/grading/CoverageMarkdown.java b/src/main/java/edu/hm/hafner/grading/CoverageMarkdown.java
index 173f081..689c585 100644
--- a/src/main/java/edu/hm/hafner/grading/CoverageMarkdown.java
+++ b/src/main/java/edu/hm/hafner/grading/CoverageMarkdown.java
@@ -66,8 +66,8 @@ protected void createSpecificDetails(final AggregatedScore aggregation, final Li
 
     private String getImageForScoreOrCoverage(final CoverageScore score) {
         if (score.hasMaxScore()) { // show the score percentage
-            return ScoreMarkdown.getPercentageImage(score.getDisplayName(), score.getPercentage());
+            return getPercentageImage(score.getDisplayName(), score.getPercentage());
         }
-        return ScoreMarkdown.getPercentageImage(score.getDisplayName(), score.getCoveredPercentage());
+        return getPercentageImage(score.getDisplayName(), score.getCoveredPercentage());
     }
 }
diff --git a/src/test/java/edu/hm/hafner/grading/AnalysisScoreTest.java b/src/test/java/edu/hm/hafner/grading/AnalysisScoreTest.java
index e28ef3e..62644e7 100644
--- a/src/test/java/edu/hm/hafner/grading/AnalysisScoreTest.java
+++ b/src/test/java/edu/hm/hafner/grading/AnalysisScoreTest.java
@@ -36,15 +36,7 @@ void shouldCalculateImpactAndScoreWithNegativeValues() {
                 }
                 """);
 
-        var analysisScore = new AnalysisScoreBuilder()
-                .withId(ID)
-                .withName(NAME)
-                .withConfiguration(configuration)
-                .withReport(createReportWith(Severity.ERROR, Severity.ERROR,
-                        Severity.WARNING_HIGH, Severity.WARNING_HIGH,
-                        Severity.WARNING_NORMAL, Severity.WARNING_NORMAL,
-                        Severity.WARNING_LOW, Severity.WARNING_LOW))
-                .build();
+        var analysisScore = createScore(configuration);
         assertThat(analysisScore)
                 .hasId(ID).hasName(NAME).hasConfiguration(configuration)
                 .hasErrorSize(2).hasHighSeveritySize(2).hasNormalSeveritySize(2).hasLowSeveritySize(2)
@@ -76,7 +68,18 @@ void shouldCalculateImpactAndScoreWithPositiveValues() {
                 }
                 """);
 
-        var analysisScore = new AnalysisScoreBuilder()
+        var analysisScore = createScore(configuration);
+        assertThat(analysisScore)
+                .hasId(ID).hasName(NAME).hasConfiguration(configuration)
+                .hasErrorSize(2).hasHighSeveritySize(2).hasNormalSeveritySize(2).hasLowSeveritySize(2)
+                .hasMaxScore(25)
+                .hasTotalSize(2 + 2 + 2 + 2)
+                .hasImpact(2 * 4 + 2 * 3 + 2 * 2 + 2)
+                .hasValue(20);
+    }
+
+    private AnalysisScore createScore(final AnalysisConfiguration configuration) {
+        return new AnalysisScoreBuilder()
                 .withId(ID)
                 .withName(NAME)
                 .withConfiguration(configuration)
@@ -85,13 +88,6 @@ void shouldCalculateImpactAndScoreWithPositiveValues() {
                         Severity.WARNING_NORMAL, Severity.WARNING_NORMAL,
                         Severity.WARNING_LOW, Severity.WARNING_LOW))
                 .build();
-        assertThat(analysisScore)
-                .hasId(ID).hasName(NAME).hasConfiguration(configuration)
-                .hasErrorSize(2).hasHighSeveritySize(2).hasNormalSeveritySize(2).hasLowSeveritySize(2)
-                .hasMaxScore(25)
-                .hasTotalSize(2 + 2 + 2 + 2)
-                .hasImpact(2 * 4 + 2 * 3 + 2 * 2 + 2)
-                .hasValue(20);
     }
 
     @Test