diff --git a/test/kdbx4_test.dart b/test/kdbx4_test.dart
index 0adac0d..cd588ba 100644
--- a/test/kdbx4_test.dart
+++ b/test/kdbx4_test.dart
@@ -1,3 +1,5 @@
+@Tags(['kdbx4'])
+
 import 'dart:io';
 
 import 'package:kdbx/kdbx.dart';
diff --git a/test/kdbx_binaries_test.dart b/test/kdbx_binaries_test.dart
index 4d2bdd4..9a6fe7d 100644
--- a/test/kdbx_binaries_test.dart
+++ b/test/kdbx_binaries_test.dart
@@ -122,7 +122,7 @@ void main() {
       // make sure the file can still be saved.
       await file.save();
     });
-  });
+  }, tags: ['kdbx3']);
   group('kdbx4 attachment', () {
     test('read binary', () async {
       final file =
@@ -171,7 +171,7 @@ void main() {
     test('Add new attachment kdbx4', () async {
       await _testAddNewAttachment('test/keepass2kdbx4binaries.kdbx');
     });
-  });
+  }, tags: ['kdbx4']);
 }
 
 class IsUtf8String extends CustomMatcher {
diff --git a/test/kdbx_history_test.dart b/test/kdbx_history_test.dart
index 3dad37f..376c37d 100644
--- a/test/kdbx_history_test.dart
+++ b/test/kdbx_history_test.dart
@@ -97,5 +97,5 @@ void main() {
       await pumpEventQueue();
       dirtyExpect.expectFinished();
     });
-  });
+  }, tags: ['kdbx3']);
 }
diff --git a/test/kdbx_test.dart b/test/kdbx_test.dart
index 0516a60..05774e1 100644
--- a/test/kdbx_test.dart
+++ b/test/kdbx_test.dart
@@ -1,3 +1,5 @@
+@Tags(['kdbx3'])
+
 import 'dart:io';
 
 import 'package:kdbx/kdbx.dart';
diff --git a/test/kdbx_upgrade_test.dart b/test/kdbx_upgrade_test.dart
index 6f31d08..85327c9 100644
--- a/test/kdbx_upgrade_test.dart
+++ b/test/kdbx_upgrade_test.dart
@@ -1,3 +1,5 @@
+@Tags(['kdbx3', 'kdbx4'])
+
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/kdbx_header.dart';
 import 'package:test/test.dart';