diff --git a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaResponseTestFactory.java b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaResponseTestFactory.java
index 603e274db7c8eb59b71becb7991d1227c58779c1..4e6fed5d2772f9799261cc5b368619c987810c6a 100644
--- a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaResponseTestFactory.java
+++ b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaResponseTestFactory.java
@@ -8,6 +8,7 @@ import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
 import java.time.ZonedDateTime;
 import java.util.Arrays;
 import java.util.List;
@@ -21,7 +22,6 @@ import org.apache.commons.codec.Resources;
 import org.apache.commons.io.IOUtils;
 
 import de.ozgcloud.common.binaryfile.TempFileUtils;
-import kotlin.text.Charsets;
 
 public class XtaResponseTestFactory {
 
@@ -121,7 +121,7 @@ public class XtaResponseTestFactory {
 
 	private static Stream<String> listResourceFileNames(String resourceDirectoryPath) {
 		try (var inputStream = Resources.getInputStream(resourceDirectoryPath)) {
-			return Arrays.stream(IOUtils.toString(inputStream, Charsets.UTF_8).split("\n"));
+			return Arrays.stream(IOUtils.toString(inputStream, StandardCharsets.UTF_8).split("\n"));
 		} catch (IOException e) {
 			throw new RuntimeException(e);
 		}
diff --git a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/zip/ZipFileExtractorTest.java b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/zip/ZipFileExtractorTest.java
index 0dec2e57b164dbc5d6b3d434c65cb999cfbc118f..5a79c2a8e2fbd90ba33ac64012991085b098282f 100644
--- a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/zip/ZipFileExtractorTest.java
+++ b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/zip/ZipFileExtractorTest.java
@@ -26,7 +26,6 @@ import org.springframework.util.MimeTypeUtils;
 
 import de.ozgcloud.eingang.common.errorhandling.TechnicalException;
 import de.ozgcloud.eingang.common.formdata.IncomingFile;
-import kotlin.text.Charsets;
 
 class ZipFileExtractorTest {
 
@@ -149,7 +148,7 @@ class ZipFileExtractorTest {
 		private List<TestZipEntry> fromMap(Map<String, String> entries) {
 			return entries.entrySet().stream().map(kv -> TestZipEntry.builder()
 							.name(kv.getKey())
-							.content(kv.getValue().getBytes(Charsets.UTF_8))
+							.content(kv.getValue().getBytes(StandardCharsets.UTF_8))
 							.build())
 					.toList();
 		}
@@ -212,7 +211,6 @@ class ZipFileExtractorTest {
 		}
 	}
 
-
 	@DisplayName("sum uncompressed entry size")
 	@Nested
 	class TestSumUncompressedEntrySize {
@@ -234,7 +232,6 @@ class ZipFileExtractorTest {
 		}
 	}
 
-
 	@Nested
 	class TestContentType {
 
@@ -267,7 +264,6 @@ class ZipFileExtractorTest {
 		}
 	}
 
-
 	@DisplayName("map zip entries")
 	@Nested
 	class TestMapZipEntries {
@@ -307,5 +303,4 @@ class ZipFileExtractorTest {
 		return string.getBytes(StandardCharsets.UTF_8);
 	}
 
-
 }