diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9217049..0f0195e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.1.0
+
+- Implement permanently removing entries and groups.
+
 ## 2.0.0+1
 
 - Small Null-safety improvement.
diff --git a/lib/src/kdbx_dao.dart b/lib/src/kdbx_dao.dart
index a842291..be832a8 100644
--- a/lib/src/kdbx_dao.dart
+++ b/lib/src/kdbx_dao.dart
@@ -1,3 +1,5 @@
+import 'package:clock/clock.dart';
+import 'package:kdbx/src/kdbx_deleted_object.dart';
 import 'package:kdbx/src/kdbx_entry.dart';
 import 'package:kdbx/src/kdbx_file.dart';
 import 'package:kdbx/src/kdbx_group.dart';
@@ -40,4 +42,26 @@ extension KdbxDao on KdbxFile {
       toGroup.addEntry(kdbxObject);
     }
   }
+
+  void deletePermanently(KdbxObject kdbxObject) {
+    final parent = kdbxObject.parent;
+    if (parent == null) {
+      throw StateError(
+          'Unable to delete object. Object as no parent, already deleted?');
+    }
+    final now = clock.now().toUtc();
+    if (kdbxObject is KdbxGroup) {
+      for (final object in kdbxObject.getAllGroupsAndEntries()) {
+        ctx.addDeletedObject(object.uuid, now);
+      }
+      parent.internalRemoveGroup(kdbxObject);
+    } else if (kdbxObject is KdbxEntry) {
+      ctx.addDeletedObject(kdbxObject.uuid, now);
+      parent.internalRemoveEntry(kdbxObject);
+    } else {
+      throw StateError('Invalid object type. ${kdbxObject.runtimeType}');
+    }
+    kdbxObject.times.locationChanged.set(now);
+    kdbxObject.internalChangeParent(null);
+  }
 }
diff --git a/lib/src/kdbx_deleted_object.dart b/lib/src/kdbx_deleted_object.dart
index 37f355f..c2ce77a 100644
--- a/lib/src/kdbx_deleted_object.dart
+++ b/lib/src/kdbx_deleted_object.dart
@@ -1,12 +1,14 @@
+import 'package:clock/clock.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:xml/xml.dart';
 
 class KdbxDeletedObject extends KdbxNode implements KdbxNodeContext {
-  KdbxDeletedObject.create(this.ctx, KdbxUuid? uuid) : super.create(NODE_NAME) {
+  KdbxDeletedObject.create(this.ctx, KdbxUuid? uuid, [DateTime? now])
+      : super.create(NODE_NAME) {
     _uuid.set(uuid);
-    deletionTime.setToNow();
+    deletionTime.set(now ?? clock.now().toUtc());
   }
 
   KdbxDeletedObject.read(XmlElement node, this.ctx) : super.read(node);
diff --git a/lib/src/kdbx_format.dart b/lib/src/kdbx_format.dart
index 29af7f7..c018614 100644
--- a/lib/src/kdbx_format.dart
+++ b/lib/src/kdbx_format.dart
@@ -138,6 +138,10 @@ class KdbxReadWriteContext {
           'Tried to remove binary which is not in this file.');
     }
   }
+
+  void addDeletedObject(KdbxUuid uuid, [DateTime? now]) {
+    _deletedObjects.add(KdbxDeletedObject.create(this, uuid));
+  }
 }
 
 abstract class CredentialsPart {
diff --git a/lib/src/kdbx_group.dart b/lib/src/kdbx_group.dart
index 602db3b..240d36a 100644
--- a/lib/src/kdbx_group.dart
+++ b/lib/src/kdbx_group.dart
@@ -57,6 +57,11 @@ class KdbxGroup extends KdbxObject {
   List<KdbxEntry> getAllEntries() =>
       getAllGroups().expand((g) => g.entries).toList(growable: false);
 
+  /// Returns all groups and entries. (Including the group itself).
+  Iterable<KdbxObject> getAllGroupsAndEntries() => <KdbxObject>[this]
+      .followedBy(entries)
+      .followedBy(groups.expand((g) => g.getAllGroupsAndEntries()));
+
   List<KdbxGroup> get groups => List.unmodifiable(_groups);
   final List<KdbxGroup> _groups = [];
 
diff --git a/lib/src/kdbx_object.dart b/lib/src/kdbx_object.dart
index d6989f0..d40cf25 100644
--- a/lib/src/kdbx_object.dart
+++ b/lib/src/kdbx_object.dart
@@ -235,7 +235,8 @@ abstract class KdbxObject extends KdbxNode {
     return el;
   }
 
-  void internalChangeParent(KdbxGroup parent) {
+  @internal
+  void internalChangeParent(KdbxGroup? parent) {
     modify(() => _parent = parent);
   }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 18b8dfe..21e8125 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: kdbx
 description: KeepassX format implementation in pure dart. (kdbx 3.x and 4.x support).
-version: 2.0.0+1
+version: 2.1.0
 homepage: https://github.com/authpass/kdbx.dart
 
 environment:
diff --git a/test/deleted_objects_test.dart b/test/deleted_objects_test.dart
index c10d4f0..f8e35ba 100644
--- a/test/deleted_objects_test.dart
+++ b/test/deleted_objects_test.dart
@@ -1,24 +1,67 @@
 @Tags(['kdbx4'])
 
+import 'package:kdbx/kdbx.dart';
+import 'package:kdbx/src/kdbx_xml.dart';
 import 'package:logging/logging.dart';
 import 'package:test/test.dart';
+import 'package:xml/xml.dart';
 
 import 'internal/test_utils.dart';
+import 'kdbx_test.dart';
 
 final _logger = Logger('deleted_objects_test');
 
 void main() {
-  TestUtil.setupLogging();
+  final testUtil = TestUtil();
   _logger.finest('Running deleted objects tests.');
   group('read tombstones', () {
     test('load/save keeps deleted objects.', () async {
       final orig =
-          await TestUtil.readKdbxFile('test/test_files/tombstonetest.kdbx');
+          await testUtil.readKdbxFile('test/test_files/tombstonetest.kdbx');
       expect(orig.body.deletedObjects, hasLength(1));
       final dt = orig.body.deletedObjects.first.deletionTime.get()!;
       expect([dt.year, dt.month, dt.day], [2020, 8, 30]);
-      final reload = await TestUtil.saveAndRead(orig);
+      final reload = await testUtil.saveAndRead(orig);
       expect(reload.body.deletedObjects, hasLength(1));
     });
   });
+  group('delete permanently', () {
+    test('delete entry', () async {
+      final file = testUtil.createEmptyFile();
+      final g = file.body.rootGroup;
+      final entry = testUtil.createEntry(file, g, 'foo', 'bar');
+      expect(g.getAllGroupsAndEntries().length, 2);
+      file.deleteEntry(entry);
+      // moved into trash bin
+      expect(g.getAllGroupsAndEntries().length, 3);
+      // now delete from trash
+      file.deletePermanently(entry);
+      expect(g.getAllGroupsAndEntries().length, 2);
+      final xml = file.body.generateXml(FakeProtectedSaltGenerator());
+      final objects = xml.findAllElements(KdbxXml.NODE_DELETED_OBJECT);
+      expect(objects.length, 1);
+      expect(objects.first.findElements(KdbxXml.NODE_UUID).first.text,
+          entry.uuid.uuid);
+    });
+    test('delete group', () async {
+      final file = testUtil.createEmptyFile();
+      final rootGroup = file.body.rootGroup;
+      final g = file.createGroup(parent: rootGroup, name: 'group');
+      final objs = [
+        g,
+        testUtil.createEntry(file, g, 'foo', 'bar'),
+        testUtil.createEntry(file, g, 'foo2', 'bar2'),
+        testUtil.createEntry(file, g, 'foo3', 'bar3'),
+      ];
+
+      expect(rootGroup.getAllGroupsAndEntries().length, 5);
+      file.deletePermanently(g);
+      expect(rootGroup.getAllGroupsAndEntries().length, 1);
+      final xml = file.body.generateXml(FakeProtectedSaltGenerator());
+      final objects = xml.findAllElements(KdbxXml.NODE_DELETED_OBJECT);
+      expect(objects.length, 4);
+      expect(objects.map((e) => e.findElements(KdbxXml.NODE_UUID).first.text),
+          objs.map((o) => o.uuid.uuid));
+    });
+  });
 }
diff --git a/test/icon/kdbx_customicon_test.dart b/test/icon/kdbx_customicon_test.dart
index f35f00b..c2d31f1 100644
--- a/test/icon/kdbx_customicon_test.dart
+++ b/test/icon/kdbx_customicon_test.dart
@@ -3,9 +3,9 @@ import 'package:test/test.dart';
 import '../internal/test_utils.dart';
 
 void main() {
-  TestUtil.setupLogging();
+  final testUtil = TestUtil();
   test('load custom icons from file', () async {
-    final file = await TestUtil.readKdbxFile('test/icon/icontest.kdbx');
+    final file = await testUtil.readKdbxFile('test/icon/icontest.kdbx');
     final entry = file.body.rootGroup.entries.first;
     expect(entry.customIcon!.data, isNotNull);
   });
diff --git a/test/internal/test_utils.dart b/test/internal/test_utils.dart
index 821aded..5e9846e 100644
--- a/test/internal/test_utils.dart
+++ b/test/internal/test_utils.dart
@@ -10,12 +10,21 @@ import 'package:logging_appenders/logging_appenders.dart';
 final _logger = Logger('test_utils');
 
 class TestUtil {
+  factory TestUtil() => instance;
+  TestUtil._() {
+    setupLogging();
+  }
+
+  static late final instance = TestUtil._();
+
   static final keyTitle = KdbxKey('Title');
 
   static void setupLogging() =>
       PrintAppender.setupLogging(stderrLevel: Level.WARNING);
 
-  static KdbxFormat kdbxFormat() {
+  late final kdbxFormat = _kdbxFormat();
+
+  static KdbxFormat _kdbxFormat() {
     Argon2.resolveLibraryForceDynamic = true;
     return KdbxFormat(Argon2FfiFlutter(resolveLibrary: (path) {
       final cwd = Directory('.').absolute.uri;
@@ -26,42 +35,54 @@ class TestUtil {
     }));
   }
 
-  static Future<KdbxFile> readKdbxFile(
+  Future<KdbxFile> readKdbxFile(
     String filePath, {
     String password = 'asdf',
   }) async {
-    final kdbxFormat = TestUtil.kdbxFormat();
     final data = await File(filePath).readAsBytes();
     final file = await kdbxFormat.read(
         data, Credentials(ProtectedValue.fromString(password)));
     return file;
   }
 
-  static Future<KdbxFile> readKdbxFileBytes(Uint8List data,
+  Future<KdbxFile> readKdbxFileBytes(Uint8List data,
       {String password = 'asdf', Credentials? credentials}) async {
-    final kdbxFormat = TestUtil.kdbxFormat();
     final file = await kdbxFormat.read(
         data, credentials ?? Credentials(ProtectedValue.fromString(password)));
     return file;
   }
 
-  static Future<KdbxFile> saveAndRead(KdbxFile file) async {
+  Future<KdbxFile> saveAndRead(KdbxFile file) async {
     return await readKdbxFileBytes(await file.save(),
         credentials: file.credentials);
   }
 
-  static Future<void> saveTestOutput(String name, KdbxFile file) async {
+  Future<void> saveTestOutput(String name, KdbxFile file) async {
     final bytes = await file.save();
     final outFile = File('test_output_$name.kdbx');
     await outFile.writeAsBytes(bytes);
     _logger.info('Written to $outFile');
   }
 
-  static KdbxFile createEmptyFile() {
-    final file = kdbxFormat().create(
+  KdbxFile createEmptyFile() {
+    final file = kdbxFormat.create(
         Credentials.composite(ProtectedValue.fromString('asdf'), null),
         'example');
 
     return file;
   }
+
+  KdbxEntry createEntry(
+    KdbxFile file,
+    KdbxGroup group,
+    String username,
+    String password,
+  ) {
+    final entry = KdbxEntry.create(file, group);
+    group.addEntry(entry);
+    entry.setString(KdbxKeyCommon.USER_NAME, PlainValue(username));
+    entry.setString(
+        KdbxKeyCommon.PASSWORD, ProtectedValue.fromString(password));
+    return entry;
+  }
 }
diff --git a/test/kdbx4_test.dart b/test/kdbx4_test.dart
index 8e1253d..f6a1782 100644
--- a/test/kdbx4_test.dart
+++ b/test/kdbx4_test.dart
@@ -1,11 +1,9 @@
 @Tags(['kdbx4'])
-
 import 'dart:io';
 
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/kdbx_header.dart';
 import 'package:logging/logging.dart';
-import 'package:logging_appenders/logging_appenders.dart';
 import 'package:test/test.dart';
 
 import 'internal/test_utils.dart';
@@ -15,9 +13,8 @@ final _logger = Logger('kdbx4_test');
 // ignore_for_file: non_constant_identifier_names
 
 void main() {
-  Logger.root.level = Level.ALL;
-  PrintAppender().attachToLogger(Logger.root);
-  final kdbxFormat = TestUtil.kdbxFormat();
+  final testUtil = TestUtil();
+  final kdbxFormat = testUtil.kdbxFormat;
   group('Reading', () {
     test('bubb', () async {
       final data = await File('test/keepassxcpasswords.kdbx').readAsBytes();
@@ -36,7 +33,7 @@ void main() {
       expect(pwd, 'def');
     });
     test('Reading kdbx4_keeweb modification time', () async {
-      final file = await TestUtil.readKdbxFile('test/kdbx4_keeweb.kdbx');
+      final file = await testUtil.readKdbxFile('test/kdbx4_keeweb.kdbx');
       final firstEntry = file.body.rootGroup.entries.first;
       final createTime = firstEntry.times.creationTime.get();
       expect(createTime, DateTime.utc(2020, 2, 26, 13, 40, 48));
@@ -44,13 +41,13 @@ void main() {
       expect(modTime, DateTime.utc(2020, 2, 26, 13, 40, 54));
     });
     test('Change kdbx4 modification time', () async {
-      final file = await TestUtil.readKdbxFile('test/kdbx4_keeweb.kdbx');
+      final file = await testUtil.readKdbxFile('test/kdbx4_keeweb.kdbx');
       final firstEntry = file.body.rootGroup.entries.first;
       final d = DateTime.utc(2020, 4, 5, 10, 0);
       firstEntry.times.lastModificationTime.set(d);
       final saved = await file.save();
       {
-        final file2 = await TestUtil.readKdbxFileBytes(saved);
+        final file2 = await testUtil.readKdbxFileBytes(saved);
         final firstEntry = file2.body.rootGroup.entries.first;
         expect(firstEntry.times.lastModificationTime.get(), d);
       }
@@ -116,12 +113,12 @@ void main() {
   });
   group('recycle bin test', () {
     test('empty recycle bin with "zero" uuid', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       final recycleBin = file.recycleBin;
       expect(recycleBin, isNull);
     });
     test('check deleting item', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       expect(file.recycleBin, isNull);
       final entry = file.body.rootGroup.getAllEntries().first;
       file.deleteEntry(entry);
diff --git a/test/kdbx_binaries_test.dart b/test/kdbx_binaries_test.dart
index f87c413..6fc4b41 100644
--- a/test/kdbx_binaries_test.dart
+++ b/test/kdbx_binaries_test.dart
@@ -18,7 +18,7 @@ void expectBinary(KdbxEntry entry, String key, dynamic matcher) {
 
 Future<void> _testAddNewAttachment(String filePath) async {
   final saved = await (() async {
-    final f = await TestUtil.readKdbxFile(filePath);
+    final f = await TestUtil().readKdbxFile(filePath);
     final entry = KdbxEntry.create(f, f.body.rootGroup);
     entry.label = 'addattachment';
     f.body.rootGroup.addEntry(entry);
@@ -34,7 +34,7 @@ Future<void> _testAddNewAttachment(String filePath) async {
     return await f.save();
   })();
   {
-    final file = await TestUtil.readKdbxFileBytes(saved);
+    final file = await TestUtil().readKdbxFileBytes(saved);
     final entry = file.body.rootGroup.entries
         .firstWhere((e) => e.label == 'addattachment');
     final binaries = entry.binaryEntries.toList();
@@ -48,8 +48,7 @@ Future<void> _testAddNewAttachment(String filePath) async {
 }
 
 void main() {
-  Logger.root.level = Level.ALL;
-  PrintAppender().attachToLogger(Logger.root);
+  final testUtil = TestUtil();
 
   group('kdbx3 attachment', () {
     void expectKeepass2binariesContents(KdbxEntry entry) {
@@ -73,28 +72,28 @@ void main() {
     }
 
     test('read binary', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2binaries.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2binaries.kdbx');
       final entry = file.body.rootGroup.entries.first;
       expectKeepass2binariesContents(entry);
     });
     test('read write read', () async {
       final fileRead =
-          await TestUtil.readKdbxFile('test/keepass2binaries.kdbx');
+          await testUtil.readKdbxFile('test/keepass2binaries.kdbx');
       final saved = await fileRead.save();
-      final file = await TestUtil.readKdbxFileBytes(saved);
+      final file = await testUtil.readKdbxFileBytes(saved);
       final entry = file.body.rootGroup.entries.first;
       expectKeepass2binariesContents(entry);
     });
     test('modify file with binary in history', () async {
       final fileRead =
-          await TestUtil.readKdbxFile('test/keepass2binaries.kdbx');
+          await testUtil.readKdbxFile('test/keepass2binaries.kdbx');
       final updateEntry = (KdbxFile file) {
         final entry = fileRead.body.rootGroup.entries.first;
         entry.setString(KdbxKeyCommon.TITLE, PlainValue('example'));
       };
       updateEntry(fileRead);
       final saved = await fileRead.save();
-      final file = await TestUtil.readKdbxFileBytes(saved);
+      final file = await testUtil.readKdbxFileBytes(saved);
       await file.save();
     });
     test('Add new attachment', () async {
@@ -102,7 +101,7 @@ void main() {
     });
     test('Remove attachment', () async {
       final saved = await (() async {
-        final file = await TestUtil.readKdbxFile('test/keepass2binaries.kdbx');
+        final file = await testUtil.readKdbxFile('test/keepass2binaries.kdbx');
         final entry = file.body.rootGroup.entries.first;
         expectKeepass2binariesContents(entry);
         expect(file.ctx.binariesIterable, hasLength(3));
@@ -110,7 +109,7 @@ void main() {
         expect(file.ctx.binariesIterable, hasLength(3));
         return await file.save();
       })();
-      final file = await TestUtil.readKdbxFileBytes(saved);
+      final file = await testUtil.readKdbxFileBytes(saved);
       final entry = file.body.rootGroup.entries.first;
       expect(entry.binaryEntries, hasLength(2));
       expect(entry.binaryEntries.map((e) => (e.key.key)),
@@ -124,8 +123,8 @@ void main() {
     });
     test('keepassxc compatibility', () async {
       // keepass has files in arbitrary sort order.
-      final file = await TestUtil.readKdbxFile(
-          'test/test_files/binarytest-keepassxc.kdbx');
+      final file = await testUtil
+          .readKdbxFile('test/test_files/binarytest-keepassxc.kdbx');
       final entry = file.body.rootGroup.entries.first;
       for (final name in ['a', 'b', 'c', 'd', 'e']) {
         expect(
@@ -138,7 +137,7 @@ void main() {
   group('kdbx4 attachment', () {
     test('read binary', () async {
       final file =
-          await TestUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
+          await testUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
 
       expect(file.body.rootGroup.entries, hasLength(2));
       expectBinary(file.body.rootGroup.entries.first, 'example2.txt',
@@ -148,9 +147,9 @@ void main() {
     });
     test('read, write, read kdbx4', () async {
       final fileRead =
-          await TestUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
+          await testUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
       final saved = await fileRead.save();
-      final file = await TestUtil.readKdbxFileBytes(saved);
+      final file = await testUtil.readKdbxFileBytes(saved);
       expect(file.body.rootGroup.entries, hasLength(2));
       expectBinary(file.body.rootGroup.entries.first, 'example2.txt',
           IsUtf8String('content2 example\n\n'));
@@ -160,7 +159,7 @@ void main() {
     test('remove attachment kdbx4', () async {
       final saved = await (() async {
         final file =
-            await TestUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
+            await testUtil.readKdbxFile('test/keepass2kdbx4binaries.kdbx');
         final entry = file.body.rootGroup.entries.first;
         expectBinary(file.body.rootGroup.entries.first, 'example2.txt',
             IsUtf8String('content2 example\n\n'));
@@ -173,7 +172,7 @@ void main() {
         expect(file.dirtyObjects, [entry]);
         return await file.save();
       })();
-      final file = await TestUtil.readKdbxFileBytes(saved);
+      final file = await testUtil.readKdbxFileBytes(saved);
       final entry = file.body.rootGroup.entries.first;
       expect(entry.binaryEntries, hasLength(0));
       expectBinary(file.body.rootGroup.entries.last, 'keepasslogo.jpeg',
diff --git a/test/kdbx_history_test.dart b/test/kdbx_history_test.dart
index 7cff462..a9b32a3 100644
--- a/test/kdbx_history_test.dart
+++ b/test/kdbx_history_test.dart
@@ -46,10 +46,10 @@ class StreamExpect<T> {
 }
 
 void main() {
-  TestUtil.setupLogging();
+  final testUtil = TestUtil();
   group('test history for values', () {
     test('check history creation', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       const valueOrig = 'Sample Entry';
       const value1 = 'new';
       const value2 = 'new2';
@@ -64,7 +64,7 @@ void main() {
       }
       expect(file.dirtyObjects, hasLength(1));
       final f2 = await dirtyExpect
-          .expectNext({}, () async => TestUtil.saveAndRead(file));
+          .expectNext({}, () async => testUtil.saveAndRead(file));
       expect(file.dirtyObjects, isEmpty);
       {
         final first = f2.body.rootGroup.entries.first;
@@ -81,7 +81,7 @@ void main() {
             () async => first.setString(TestUtil.keyTitle, PlainValue(value2)));
       }
       final f3 = await dirtyExpect
-          .expectNext({}, () async => TestUtil.saveAndRead(file));
+          .expectNext({}, () async => testUtil.saveAndRead(file));
       expect(file.dirtyObjects, isEmpty);
       {
         final first = f3.body.rootGroup.entries.first;
diff --git a/test/kdbx_test.dart b/test/kdbx_test.dart
index d1bffd8..defa489 100644
--- a/test/kdbx_test.dart
+++ b/test/kdbx_test.dart
@@ -22,9 +22,8 @@ class FakeProtectedSaltGenerator implements ProtectedSaltGenerator {
 }
 
 void main() {
-  Logger.root.level = Level.ALL;
-  PrintAppender().attachToLogger(Logger.root);
-  final kdbxFormat = KdbxFormat();
+  final testUtil = TestUtil();
+  final kdbxFormat = testUtil.kdbxFormat;
   group('Reading', () {
     setUp(() {});
 
@@ -94,7 +93,7 @@ void main() {
 
   group('times', () {
     test('read mod date time', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       final first = file.body.rootGroup.entries.first;
       expect(file.header.version.major, 3);
       expect(first.getString(KdbxKeyCommon.TITLE)!.getText(), 'Sample Entry');
@@ -103,7 +102,7 @@ void main() {
     });
     test('update mod date time', () async {
       final newModDate = DateTime.utc(2020, 1, 2, 3, 4, 5);
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       {
         final first = file.body.rootGroup.entries.first;
         expect(file.header.version.major, 3);
@@ -112,7 +111,7 @@ void main() {
       }
       final saved = await file.save();
       {
-        final file = await TestUtil.readKdbxFileBytes(saved);
+        final file = await testUtil.readKdbxFileBytes(saved);
         final first = file.body.rootGroup.entries.first;
         final modTime = first.times.lastModificationTime.get();
         expect(modTime, newModDate);
@@ -144,7 +143,7 @@ void main() {
       File('test.kdbx').writeAsBytesSync(saved);
     });
     test('concurrent save test', () async {
-      final file = await TestUtil.readKdbxFile('test/keepass2test.kdbx');
+      final file = await testUtil.readKdbxFile('test/keepass2test.kdbx');
       final readLock = Lock();
       Future<KdbxFile> doSave(
           Future<Uint8List> byteFuture, String debug) async {
@@ -152,7 +151,7 @@ void main() {
         final bytes = await byteFuture;
         return await readLock.synchronized(() {
           try {
-            final ret = TestUtil.readKdbxFileBytes(bytes);
+            final ret = testUtil.readKdbxFileBytes(bytes);
             _logger.fine('$debug FINISHED: success');
             return ret;
           } catch (e, stackTrace) {
diff --git a/test/kdbx_upgrade_test.dart b/test/kdbx_upgrade_test.dart
index 144b691..bea6fb9 100644
--- a/test/kdbx_upgrade_test.dart
+++ b/test/kdbx_upgrade_test.dart
@@ -6,17 +6,17 @@ import 'package:test/test.dart';
 import 'internal/test_utils.dart';
 
 void main() {
-  TestUtil.setupLogging();
+  final testUtil = TestUtil();
   group('Test upgrade from v3 to v4', () {
-    final format = TestUtil.kdbxFormat();
+    final format = testUtil.kdbxFormat;
     test('Read v3, write v4', () async {
       final file =
-          await TestUtil.readKdbxFile('test/FooBar.kdbx', password: 'FooBar');
+          await testUtil.readKdbxFile('test/FooBar.kdbx', password: 'FooBar');
       expect(file.header.version, KdbxVersion.V3_1);
       file.upgrade(KdbxVersion.V4.major);
-      final v4 = await TestUtil.saveAndRead(file);
+      final v4 = await testUtil.saveAndRead(file);
       expect(v4.header.version, KdbxVersion.V4);
-      await TestUtil.saveTestOutput('kdbx4upgrade', v4);
+      await testUtil.saveTestOutput('kdbx4upgrade', v4);
     }, tags: 'kdbx3');
     test('kdbx4 is the new default', () async {
       final file =
diff --git a/test/merge/kdbx_merge_test.dart b/test/merge/kdbx_merge_test.dart
index a731635..5a24b40 100644
--- a/test/merge/kdbx_merge_test.dart
+++ b/test/merge/kdbx_merge_test.dart
@@ -9,7 +9,7 @@ import '../internal/test_utils.dart';
 final _logger = Logger('kdbx_merge_test');
 
 void main() {
-  TestUtil.setupLogging();
+  final testUtil = TestUtil();
   var now = DateTime.fromMillisecondsSinceEpoch(0);
 
   final fakeClock = Clock(() => now);
@@ -22,18 +22,18 @@ void main() {
   });
   group('Simple merges', () {
     Future<KdbxFile> createSimpleFile() async {
-      final file = TestUtil.createEmptyFile();
+      final file = testUtil.createEmptyFile();
       _createEntry(file, file.body.rootGroup, 'test1', 'test1');
       final subGroup =
           file.createGroup(parent: file.body.rootGroup, name: 'Sub Group');
       _createEntry(file, subGroup, 'test2', 'test2');
       proceedSeconds(10);
-      return await TestUtil.saveAndRead(file);
+      return await testUtil.saveAndRead(file);
     }
 
     test('Noop merge', () async {
       final file = await createSimpleFile();
-      final file2 = await TestUtil.saveAndRead(file);
+      final file2 = await testUtil.saveAndRead(file);
       final merge = file.merge(file2);
       final set = Set<KdbxUuid>.from(merge.merged.keys);
       expect(set, hasLength(4));
@@ -43,7 +43,7 @@ void main() {
       await withClock(fakeClock, () async {
         final file = await createSimpleFile();
 
-        final fileMod = await TestUtil.saveAndRead(file);
+        final fileMod = await testUtil.saveAndRead(file);
 
         fileMod.body.rootGroup.entries.first
             .setString(KdbxKeyCommon.USER_NAME, PlainValue('changed.'));
@@ -51,7 +51,7 @@ void main() {
             fileMod.body.rootGroup.entries.first.times.lastModificationTime
                 .get()
                 .toString());
-        final file2 = await TestUtil.saveAndRead(fileMod);
+        final file2 = await testUtil.saveAndRead(fileMod);
 
         _logger.info('\n\n\nstarting merge.\n');
         final merge = file.merge(file2);
@@ -66,10 +66,10 @@ void main() {
       () async => await withClock(fakeClock, () async {
         final file = await createSimpleFile();
 
-        final fileMod = await TestUtil.saveAndRead(file);
+        final fileMod = await testUtil.saveAndRead(file);
 
         fileMod.body.rootGroup.groups.first.name.set('Sub Group New Name.');
-        final file2 = await TestUtil.saveAndRead(fileMod);
+        final file2 = await testUtil.saveAndRead(fileMod);
         final merge = file.merge(file2);
         final set = Set<KdbxUuid>.from(merge.merged.keys);
         expect(set, hasLength(4));
@@ -81,18 +81,19 @@ void main() {
       () async => await withClock(fakeClock, () async {
         final file = await createSimpleFile();
 
-        final fileMod = await TestUtil.saveAndRead(file);
+        final fileMod = await testUtil.saveAndRead(file);
 
         expect(fileMod.recycleBin, isNull);
         fileMod.deleteEntry(fileMod.body.rootGroup.entries.first);
         expect(fileMod.recycleBin, isNotNull);
-        final file2 = await TestUtil.saveAndRead(fileMod);
+        final file2 = await testUtil.saveAndRead(fileMod);
         final merge = file.merge(file2);
         _logger.info('Merged file:\n'
             '${KdbxPrintUtils().catGroupToString(file.body.rootGroup)}');
         final set = Set<KdbxUuid>.from(merge.merged.keys);
         expect(set, hasLength(5));
-        expect(Set<KdbxNode>.from(merge.changes.map<KdbxNode?>((e) => e.object)),
+        expect(
+            Set<KdbxNode>.from(merge.changes.map<KdbxNode?>((e) => e.object)),
             hasLength(2));
       }),
     );