diff --git a/endtoend-testing/src/main/java/de/jplag/endtoend/helper/UnzipManager.java b/endtoend-testing/src/main/java/de/jplag/endtoend/helper/UnzipManager.java
index 4c363d39c..332819cb5 100644
--- a/endtoend-testing/src/main/java/de/jplag/endtoend/helper/UnzipManager.java
+++ b/endtoend-testing/src/main/java/de/jplag/endtoend/helper/UnzipManager.java
@@ -9,16 +9,17 @@
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
-import java.util.logging.Logger;
 
 import org.apache.commons.lang3.SystemUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import de.jplag.endtoend.model.DataSet;
 
 public class UnzipManager {
     private final Map<DataSet, File> unzippedFiles;
     private static UnzipManager instance;
-    private final Logger logger = Logger.getLogger("Unzip Manager");
+    private final Logger logger = LoggerFactory.getLogger(UnzipManager.class);
 
     private static synchronized UnzipManager getInstance() {
         if (instance == null) {
@@ -46,7 +47,7 @@ private File unzipOrCacheInternal(DataSet dataSet, File zip) throws IOException
             } else {
                 target = Files.createTempDirectory(zip.getName()).toFile();
                 if (!(target.setReadable(true, true) && target.setWritable(true, true) && target.setExecutable(true, true))) {
-                    logger.warning("Could not set permissions for temp directory (" + target.getAbsolutePath() + ").");
+                    logger.warn("Could not set permissions for temp directory ({}).", target.getAbsolutePath());
                 }
             }
 
diff --git a/language-testutils/src/test/java/de/jplag/testutils/LanguageModuleTest.java b/language-testutils/src/test/java/de/jplag/testutils/LanguageModuleTest.java
index 46133a743..37b8338cd 100644
--- a/language-testutils/src/test/java/de/jplag/testutils/LanguageModuleTest.java
+++ b/language-testutils/src/test/java/de/jplag/testutils/LanguageModuleTest.java
@@ -13,8 +13,6 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.BeforeAll;
@@ -22,6 +20,8 @@
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import de.jplag.Language;
 import de.jplag.ParsingException;
@@ -40,7 +40,7 @@
 public abstract class LanguageModuleTest {
     private static final Path DEFAULT_TEST_CODE_PATH_BASE = Path.of("src", "test", "resources", "de", "jplag");
 
-    private final Logger LOG = Logger.getLogger(this.getClass().getName());
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
     private final TestDataCollector collector;
     private final Language language;
@@ -253,7 +253,7 @@ final void collectTestData() {
 
     private List<Token> parseTokens(TestData source) throws ParsingException, IOException {
         List<Token> tokens = source.parseTokens(this.language);
-        LOG.log(Level.INFO, TokenPrinter.printTokens(tokens));
+        logger.info(TokenPrinter.printTokens(tokens));
         return tokens;
     }