diff --git a/packages/neon/neon/lib/src/models/account.dart b/packages/neon/neon/lib/src/models/account.dart
index a690483a..567b555a 100644
--- a/packages/neon/neon/lib/src/models/account.dart
+++ b/packages/neon/neon/lib/src/models/account.dart
@@ -66,16 +66,26 @@ class Account implements Credentials {
 
   String get id {
     final key = '$username@$serverURL';
-    if (_idCache[key] != null) {
-      return _idCache[key]!;
-    }
-    return _idCache[key] = sha1.convert(utf8.encode(key)).toString();
+
+    return _idCache[key] ??= sha1.convert(utf8.encode(key)).toString();
   }
 
   String get humanReadableID {
     final uri = Uri.parse(serverURL);
+
     // Maybe also show path if it is not '/' ?
-    return '$username@${uri.port != 443 ? '${uri.host}:${uri.port}' : uri.host}';
+    final buffer = StringBuffer()
+      ..write(username)
+      ..write('@')
+      ..write(uri.host);
+
+    if (uri.hasPort) {
+      buffer
+        ..write(':')
+        ..write(uri.port);
+    }
+
+    return buffer.toString();
   }
 
   /// Completes an incomplete [Uri] using the [serverURL].
diff --git a/packages/neon/neon/test/account_test.dart b/packages/neon/neon/test/account_test.dart
index a86b934e..34e360f4 100644
--- a/packages/neon/neon/test/account_test.dart
+++ b/packages/neon/neon/test/account_test.dart
@@ -60,4 +60,91 @@ void main() {
       });
     }
   });
+
+  group('Account', () {
+    final account = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe',
+      password: 'super_secret',
+    );
+
+    test('serialization', () {
+      const json = {
+        'serverURL': 'http://example.com',
+        'username': 'JohnDoe',
+        'password': 'super_secret',
+        'userAgent': null,
+      };
+
+      expect(account.toJson(), equals(json));
+
+      expect(Account.fromJson(json), equals(account));
+    });
+
+    test('id', () {
+      expect(account.id, '8bcb507a406c5ad0eed4072601bcfdd2d923e87d');
+    });
+
+    test('humanReadableID', () {
+      expect(account.humanReadableID, 'JohnDoe@example.com');
+
+      final accountWithDefaultPort = Account(
+        serverURL: 'http://example.com:80',
+        username: 'JohnDoe',
+        password: 'super_secret',
+      );
+
+      expect(accountWithDefaultPort.humanReadableID, 'JohnDoe@example.com');
+
+      final accountWithPort = Account(
+        serverURL: 'http://example.com:8080',
+        username: 'JohnDoe',
+        password: 'super_secret',
+      );
+
+      expect(accountWithPort.humanReadableID, 'JohnDoe@example.com:8080');
+    });
+  });
+
+  test('AccountFind', () {
+    final account1 = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe',
+      password: 'super_secret',
+    );
+    final account2 = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe2',
+      password: 'super_secret',
+    );
+    final account3 = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe3',
+      password: 'super_secret',
+    );
+    final account4 = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe4',
+      password: 'super_secret',
+    );
+    final account5 = Account(
+      serverURL: 'http://example.com',
+      username: 'JohnDoe5',
+      password: 'super_secret',
+    );
+    final accounts = {
+      account1,
+      account2,
+      account3,
+      account4,
+      account5,
+    };
+
+    expect(accounts.tryFind(null), isNull);
+    expect(accounts.tryFind('invalidID'), isNull);
+    expect(accounts.tryFind(account3.id), equals(account3));
+
+    expect(() => accounts.find('invalidID'), throwsA(isA<StateError>()));
+    expect(accounts.find(account3.id), equals(account3));
+  });
 }
diff --git a/packages/neon/neon/test/neon_platform_test.dart b/packages/neon/neon/test/neon_platform_test.dart
new file mode 100644
index 00000000..06c6395d
--- /dev/null
+++ b/packages/neon/neon/test/neon_platform_test.dart
@@ -0,0 +1,12 @@
+import 'package:neon/src/platform/platform.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('NeonPlatform', () async {
+    expect(() => NeonPlatform.instance, throwsA(isA<StateError>()));
+
+    await NeonPlatform.setup();
+
+    expect(NeonPlatform.instance, isA<NeonPlatform>());
+  });
+}
diff --git a/packages/neon/neon/test/stream_listenable_test.dart b/packages/neon/neon/test/stream_listenable_test.dart
new file mode 100644
index 00000000..7ae1d841
--- /dev/null
+++ b/packages/neon/neon/test/stream_listenable_test.dart
@@ -0,0 +1,73 @@
+// ignore_for_file: unreachable_from_main
+
+import 'dart:async';
+
+import 'package:mocktail/mocktail.dart';
+import 'package:neon/src/utils/stream_listenable.dart';
+import 'package:rxdart/rxdart.dart';
+import 'package:test/test.dart';
+
+class MockCallbackFunction extends Mock {
+  FutureOr<void> call();
+}
+
+void main() {
+  group('StreamListenable', () {
+    test('stream', () async {
+      final stream = BehaviorSubject<bool>();
+      final callback = MockCallbackFunction();
+
+      StreamListenable(stream).addListener(callback.call);
+
+      verifyNever(callback.call);
+
+      stream.value = true;
+      await Future.delayed(const Duration(milliseconds: 100));
+      verify(callback.call).called(1);
+
+      stream.value = true;
+      await Future.delayed(const Duration(milliseconds: 100));
+      verify(callback.call).called(1);
+
+      unawaited(stream.close());
+    });
+
+    test('multiStream', () async {
+      final stream = BehaviorSubject<bool>();
+      final stream2 = BehaviorSubject<int>();
+      final callback = MockCallbackFunction();
+
+      StreamListenable.multiListenable({
+        stream,
+        stream2,
+      }).addListener(callback.call);
+
+      verifyNever(callback.call);
+
+      stream.value = true;
+      await Future.delayed(const Duration(milliseconds: 100));
+      verify(callback.call).called(1);
+
+      stream2.value = 3;
+      await Future.delayed(const Duration(milliseconds: 100));
+      verify(callback.call).called(1);
+
+      unawaited(stream.close());
+      unawaited(stream2.close());
+    });
+
+    test('dispose', () {
+      final controller = StreamController();
+
+      final listenable = StreamListenable(controller.stream);
+
+      expect(controller.hasListener, true);
+
+      // ignore: cascade_invocations
+      listenable.dispose();
+
+      expect(controller.isClosed, false);
+      unawaited(controller.close());
+    });
+  });
+}
diff --git a/packages/neon/neon/test/useragent_test.dart b/packages/neon/neon/test/useragent_test.dart
new file mode 100644
index 00000000..b4550fa2
--- /dev/null
+++ b/packages/neon/neon/test/useragent_test.dart
@@ -0,0 +1,17 @@
+import 'package:neon/src/utils/user_agent.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('UserAgent', () {
+    final packageInfo = PackageInfo(
+      appName: 'appName',
+      packageName: 'packageName',
+      version: 'version',
+      buildNumber: 'buildNumber',
+    );
+    buildUserAgent(packageInfo);
+
+    expect(neonUserAgent, 'Neon version+buildNumber');
+  });
+}