diff --git a/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/EvaluationResults.java b/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/EvaluationResults.java
index b6e35a1..5c2c63b 100644
--- a/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/EvaluationResults.java
+++ b/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/EvaluationResults.java
@@ -22,8 +22,8 @@ public String toRow() {
     public String toRow(String headerKey, String headerVal) {
         return String.format(Locale.ENGLISH, """
                 %10s & %4s & %4s & %4s & %4s & %4s & %4s & %4s
-                %10s & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f""", headerKey, "P", "R", "F1", "Acc", "Spec", "Phi", "PhiN", headerVal, precision(),
-                recall(), f1(), accuracy(), specificity(), phiCoefficient(), phiOverPhiMax());
+                %10s & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f & %4.2f""", headerKey, "P", "R", "F1", "Acc", "Spec", "Phi", "PhiN", headerVal,
+                precision(), recall(), f1(), accuracy(), specificity(), phiCoefficient(), phiOverPhiMax());
     }
 
     @Override
@@ -52,7 +52,8 @@ public String getExtendedResultStringWithExpected(ExpectedResults expectedResult
         outputBuilder.append(String.format(Locale.ENGLISH, """
                 \tPrecision:%8.2f (min. expected: %.2f)
                 \tRecall:%11.2f (min. expected: %.2f)
-                \tF1:%15.2f (min. expected: %.2f)""", precision(), expectedResults.precision(), recall(), expectedResults.recall(), f1(), expectedResults.f1()));
+                \tF1:%15.2f (min. expected: %.2f)""", precision(), expectedResults.precision(), recall(), expectedResults.recall(), f1(), expectedResults
+                .f1()));
         outputBuilder.append(String.format(Locale.ENGLISH, """
 
                 \tAccuracy:%9.2f (min. expected: %.2f)
@@ -72,8 +73,8 @@ public String getExplicitResultString() {
                 \tTN:%15d
                 \tFN:%15d
                 \tP:%16d
-                \tN:%16d""", truePositives().size(), falsePositives().size(), trueNegatives(), falseNegatives().size(), truePositives().size() + falseNegatives().size(),
-                trueNegatives() + falsePositives().size());
+                \tN:%16d""", truePositives().size(), falsePositives().size(), trueNegatives(), falseNegatives().size(), truePositives()
+                .size() + falseNegatives().size(), trueNegatives() + falsePositives().size());
     }
 
     public ImmutableList<T> getFound() {
diff --git a/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/calculator/ResultCalculatorUtil.java b/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/calculator/ResultCalculatorUtil.java
index 53e8067..709b62c 100644
--- a/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/calculator/ResultCalculatorUtil.java
+++ b/tests/integration-tests/tests-base/src/main/java/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/calculator/ResultCalculatorUtil.java
@@ -1,11 +1,16 @@
 /* Licensed under MIT 2023-2024. */
 package edu.kit.kastel.mcse.ardoco.core.tests.eval.results.calculator;
 
+import java.util.List;
+
 import org.eclipse.collections.api.factory.Sets;
 import org.eclipse.collections.api.list.ImmutableList;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import edu.kit.kastel.mcse.ardoco.core.tests.eval.results.EvaluationResults;
 import edu.kit.kastel.mcse.ardoco.metrics.ClassificationMetricsCalculator;
+import edu.kit.kastel.mcse.ardoco.metrics.result.AggregatedClassificationResult;
 import edu.kit.kastel.mcse.ardoco.metrics.result.AggregationType;
 import edu.kit.kastel.mcse.ardoco.metrics.result.SingleClassificationResult;
 
@@ -13,37 +18,47 @@
  * This utility class provides methods to form the average of several {@link EvaluationResults}
  */
 public final class ResultCalculatorUtil {
+    private static final Logger logger = LoggerFactory.getLogger(ResultCalculatorUtil.class);
 
     private ResultCalculatorUtil() {
         throw new IllegalAccessError();
     }
 
     public static <T> EvaluationResults<T> calculateAverageResults(ImmutableList<EvaluationResults<T>> results) {
-        var calculator = ClassificationMetricsCalculator.getInstance();
-        var classifications = results.stream().map(EvaluationResults::classificationResult).toList();
+        var averages = getAverages(results);
+        if (averages == null)
+            return null;
 
-        var averages = calculator.calculateAverages(classifications, null);
         var macroAverage = averages.stream().filter(it -> it.getType() == AggregationType.MACRO_AVERAGE).findFirst().orElseThrow();
-
-        var macroAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, macroAverage
-                .getPrecision(), macroAverage.getRecall(), macroAverage.getF1(), macroAverage.getAccuracy(), macroAverage.getSpecificity(), macroAverage
-                        .getPhiCoefficient(), macroAverage.getPhiCoefficientMax(), macroAverage.getPhiOverPhiMax());
-
-        return new EvaluationResults<>(macroAverageAsSingle);
+        return evaluationResults(macroAverage);
     }
 
     public static <T> EvaluationResults<T> calculateWeightedAverageResults(ImmutableList<EvaluationResults<T>> results) {
-        var calculator = ClassificationMetricsCalculator.getInstance();
-        var classifications = results.stream().map(EvaluationResults::classificationResult).toList();
+        var averages = getAverages(results);
+        if (averages == null)
+            return null;
 
-        var averages = calculator.calculateAverages(classifications, null);
         var macroAverage = averages.stream().filter(it -> it.getType() == AggregationType.WEIGHTED_AVERAGE).findFirst().orElseThrow();
+        return evaluationResults(macroAverage);
+    }
 
-        var weightedAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, macroAverage
-                .getPrecision(), macroAverage.getRecall(), macroAverage.getF1(), macroAverage.getAccuracy(), macroAverage.getSpecificity(), macroAverage
-                        .getPhiCoefficient(), macroAverage.getPhiCoefficientMax(), macroAverage.getPhiOverPhiMax());
+    private static <T> EvaluationResults<T> evaluationResults(AggregatedClassificationResult average) {
+        var weightedAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, average
+                .getPrecision(), average.getRecall(), average.getF1(), average.getAccuracy(), average.getSpecificity(), average.getPhiCoefficient(), average
+                        .getPhiCoefficientMax(), average.getPhiOverPhiMax());
 
         return new EvaluationResults<>(weightedAverageAsSingle);
+    }
+
+    private static <T> List<AggregatedClassificationResult> getAverages(ImmutableList<EvaluationResults<T>> results) {
+        if (results.isEmpty()) {
+            logger.warn("No results to calculate average from");
+            return null;
+        }
+
+        var calculator = ClassificationMetricsCalculator.getInstance();
+        var classifications = results.stream().map(EvaluationResults::classificationResult).toList();
 
+        return calculator.calculateAverages(classifications, null);
     }
 }
diff --git a/tests/integration-tests/tests-inconsistency/src/test/java/edu/kit/kastel/mcse/ardoco/id/tests/integration/InconsistencyDetectionEvaluationIT.java b/tests/integration-tests/tests-inconsistency/src/test/java/edu/kit/kastel/mcse/ardoco/id/tests/integration/InconsistencyDetectionEvaluationIT.java
index 9665389..1c120f2 100644
--- a/tests/integration-tests/tests-inconsistency/src/test/java/edu/kit/kastel/mcse/ardoco/id/tests/integration/InconsistencyDetectionEvaluationIT.java
+++ b/tests/integration-tests/tests-inconsistency/src/test/java/edu/kit/kastel/mcse/ardoco/id/tests/integration/InconsistencyDetectionEvaluationIT.java
@@ -528,13 +528,13 @@ private static Pair<MutableList<EvaluationResults<String>>, StringBuilder> inspe
 
     private static void inspectRun(StringBuilder outputBuilder, StringBuilder detailedOutputBuilder, MutableList<EvaluationResults<String>> allResults,
             ArDoCoResult arDoCoResult, EvaluationResults<String> result) {
-        var truePositives = result.truePositives().toList();
+        var truePositives = result.truePositives();
         appendResults(truePositives, detailedOutputBuilder, "True Positives", arDoCoResult, outputBuilder);
 
-        var falsePositives = result.falsePositives().toList();
+        var falsePositives = result.falsePositives();
         appendResults(falsePositives, detailedOutputBuilder, "False Positives", arDoCoResult, outputBuilder);
 
-        var falseNegatives = result.falseNegatives().toList();
+        var falseNegatives = result.falseNegatives();
         appendResults(falseNegatives, detailedOutputBuilder, "False Negatives", arDoCoResult, outputBuilder);
         allResults.add(result);
     }