diff --git a/CHANGELOG.md b/CHANGELOG.md
index 936896ea9562652184c88483d52daa75d22e925d..585393252db26e84b4d16ba53a1b4e76c14e6d2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 Upcoming version:
 -----------------
+  - minor interface improvements (Nikolaus Krismer)
   - fixed typo in variable name (Nikolaus Krismer)
   - calling algorithms clear method explicitly to free memory earlier (Nikolaus Krismer)
   - added support for multiple remote repositories (as fallbacks) (Nikolaus Krismer)
diff --git a/src/performance/java/it/unibz/inf/isochrone/algorithm/BreakEvenPointTest.java b/src/performance/java/it/unibz/inf/isochrone/algorithm/BreakEvenPointTest.java
index d29aee7c05c23c8f16a3a65e419ca83dc444e22c..bcc252b8bf5b20397458937d55873e892af087b1 100644
--- a/src/performance/java/it/unibz/inf/isochrone/algorithm/BreakEvenPointTest.java
+++ b/src/performance/java/it/unibz/inf/isochrone/algorithm/BreakEvenPointTest.java
@@ -168,7 +168,7 @@ public class BreakEvenPointTest {
 					LOGGER.info("More testing is needed to find break even point in dataset \"{}\" and sampleType {} (maxDuration tested: {})", datasetName, sTypeName, restrictionValue);
 					LOGGER.info("-----------------------------");
 					nextRestrictionValue = restrictionValue + searchDurationStep;
-					runner = new SampleRunnerBuilder().addDataset(datasetName).addDuration(nextRestrictionValue).build(SAMPLE_PROPERTY);
+					runner = new SampleRunnerBuilder().addDatasets(datasetName).addDuration(nextRestrictionValue).build(SAMPLE_PROPERTY);
 					break;
 				case NODES:
 					final long dsNodeCount = getDatasetNodeCount(datasetName);
@@ -183,7 +183,7 @@ public class BreakEvenPointTest {
 					LOGGER.info("More testing is needed to find break even point for dataset \"{}\" and sampleType {} (%-tested: {})", datasetName, sTypeName, FORMAT_PERCENTAGE.format(pTested));
 					LOGGER.info("-----------------------------");
 					nextRestrictionValue = (long) ((pTested + searchNodeStepPercentage) * dsNodeCount) + 1;
-					runner = new SampleRunnerBuilder().addDataset(datasetName).addNodes(nextRestrictionValue).build(SAMPLE_PROPERTY);
+					runner = new SampleRunnerBuilder().addDatasets(datasetName).addNodes(nextRestrictionValue).build(SAMPLE_PROPERTY);
 					break;
 				default:
 					nextRestrictionValue = -1;
diff --git a/src/performance/java/it/unibz/inf/isochrone/algorithm/tile/TileSizeTest.java b/src/performance/java/it/unibz/inf/isochrone/algorithm/tile/TileSizeTest.java
index e9281f8da234b4feed0b2dd6d09769dd4f6b733e..2f6fcdc9afbafc5078f1eeea0f388bf0e3bf5565 100644
--- a/src/performance/java/it/unibz/inf/isochrone/algorithm/tile/TileSizeTest.java
+++ b/src/performance/java/it/unibz/inf/isochrone/algorithm/tile/TileSizeTest.java
@@ -28,6 +28,7 @@ import it.unibz.inf.isochrone.ListenerLogging;
 import it.unibz.inf.isochrone.ListenerSetup;
 import it.unibz.inf.isochrone.MathHelper;
 import it.unibz.inf.isochrone.SampleHelper;
+import it.unibz.inf.isochrone.TestConfiguration;
 import it.unibz.inf.isochrone.TestHelper;
 import it.unibz.inf.isochrone.algorithm.Algorithm;
 import it.unibz.inf.isochrone.algorithm.Mine;
@@ -66,7 +67,7 @@ public class TileSizeTest {
 		return z0.byteValue() > z1.byteValue();
 	};
 	private static final Logger LOGGER = LogManager.getLogger(TileSizeTest.class);
-	private static final int REPEAT_COUNT = 1; // TestConfiguration.DEFAULT_REPEAT_COUNT;
+	private static final int REPEAT_COUNT = TestConfiguration.DEFAULT_REPEAT_COUNT;
 	private static final String RESULTFILE_NAME = "build/reports/performanceTests/algorithm-tileSize";
 	private static final Collection<SampleProperty> SAMPLE_PROPERTIES = Arrays.asList(new SampleProperty[] {
 //		SampleProperty.NR_NODES_CURRENT,	// commented -> since no vertex expiration is used this will be the same as NR_NODES_TOTAL
diff --git a/src/performance/java/it/unibz/inf/isochrone/plot/sample/SampleRunner.java b/src/performance/java/it/unibz/inf/isochrone/plot/sample/SampleRunner.java
index 7fe6a401f69c54dca9027ad49266db538b29250b..9ea9c41d8602add0e551677eaae23f5f59c8797e 100644
--- a/src/performance/java/it/unibz/inf/isochrone/plot/sample/SampleRunner.java
+++ b/src/performance/java/it/unibz/inf/isochrone/plot/sample/SampleRunner.java
@@ -100,11 +100,6 @@ public final class SampleRunner {
 
 		// Public methods
 
-		public SampleRunnerBuilder addDataset(final String datasetName) {
-			addDataset(datasetName, ConfigAlgorithmHelper.getDatasetBuilder(datasetName));
-			return this;
-		}
-
 		public SampleRunnerBuilder addDataset(final String datasetName, final ConfigAlgorithmBuilder params) {
 			if (datasets == null) {
 				datasets = new TreeMap<>();