diff --git a/test/classes_tests/test_global.dart b/test/classes_tests/test_global.dart
new file mode 100644
index 0000000..4ee4cff
--- /dev/null
+++ b/test/classes_tests/test_global.dart
@@ -0,0 +1,46 @@
+import 'package:test/test.dart';
+import '../classes/Global.dart';
+
+void main() {
+  group('Global', () {
+    test('Initial device list should be empty', () {
+      expect(Global.devices, isEmpty);
+    });
+
+    test('Initial connected devices list should be empty', () {
+      expect(Global.connectedDevices, isEmpty);
+    });
+
+    test('Initial nearbyService should be null', () {
+      expect(Global.nearbyService, isNull);
+    });
+
+    test('Initial subscription should be null', () {
+      expect(Global.subscription, isNull);
+    });
+
+    test('Initial receivedDataSubscription should be null', () {
+      expect(Global.receivedDataSubscription, isNull);
+    });
+
+    test('Initial messages list should not be empty', () {
+      expect(Global.messages, isNotEmpty);
+    });
+
+    test('Initial publicKeys map should be empty', () {
+      expect(Global.publicKeys, isEmpty);
+    });
+
+    test('Initial conversations map should be empty', () {
+      expect(Global.conversations, isEmpty);
+    });
+
+    test('Initial myName should be an empty string', () {
+      expect(Global.myName, isEmpty);
+    });
+
+    test('Initial cache map should be empty', () {
+      expect(Global.cache, isEmpty);
+    });
+  });
+}
diff --git a/test/classes_tests/test_msg.dart b/test/classes_tests/test_msg.dart
new file mode 100644
index 0000000..c4d33b3
--- /dev/null
+++ b/test/classes_tests/test_msg.dart
@@ -0,0 +1,22 @@
+import 'package:test/test.dart';
+import '../classes/Msg.dart';
+
+void main() {
+  group('Msg', () {
+    test('Initialization', () {
+      final msg = Msg("Test Message", "sent", "2023-01-01", "1");
+
+      expect(msg.message, "Test Message");
+      expect(msg.msgtype, "sent");
+      expect(msg.timestamp, "2023-01-01");
+      expect(msg.id, "1");
+      expect(msg.ack, "false");
+    });
+
+    test('Acknowledgment Default Value', () {
+      final msg = Msg("Test Message", "sent", "2023-01-01", "1");
+
+      expect(msg.ack, "false");
+    });
+  });
+}
diff --git a/test/classes_tests/test_payload.dart b/test/classes_tests/test_payload.dart
new file mode 100644
index 0000000..5173722
--- /dev/null
+++ b/test/classes_tests/test_payload.dart
@@ -0,0 +1,25 @@
+import 'package:test/test.dart';
+import '../classes/Payload.dart'; 
+
+void main() {
+  group('Payload and Ack Tests', () {
+    test('Payload Initialization', () {
+      final payload = Payload("1", "sender", "receiver", "message", "timestamp");
+
+      expect(payload.id, "1");
+      expect(payload.sender, "sender");
+      expect(payload.receiver, "receiver");
+      expect(payload.message, "message");
+      expect(payload.timestamp, "timestamp");
+      expect(payload.broadcast, true);
+      expect(payload.type, "Payload");
+    });
+
+    test('Ack Initialization', () {
+      final ack = Ack("1");
+
+      expect(ack.id, "1");
+      expect(ack.type, "Ack");
+    });
+  });
+}