diff --git a/lib/screens/metering/components/camera_container/state_container_camera.dart b/lib/screens/metering/components/camera_container/state_container_camera.dart
index 6548a87..4dfc02d 100644
--- a/lib/screens/metering/components/camera_container/state_container_camera.dart
+++ b/lib/screens/metering/components/camera_container/state_container_camera.dart
@@ -62,4 +62,14 @@ class CameraErrorState extends CameraContainerState {
   final CameraErrorType error;
 
   const CameraErrorState(this.error);
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other.runtimeType != runtimeType) return false;
+    return other is CameraErrorState && other.error == error;
+  }
+
+  @override
+  int get hashCode => Object.hash(error, runtimeType);
 }
diff --git a/test/screens/metering/components/camera/event_container_camera_test.dart b/test/screens/metering/components/camera/event_container_camera_test.dart
new file mode 100644
index 0000000..f136b5f
--- /dev/null
+++ b/test/screens/metering/components/camera/event_container_camera_test.dart
@@ -0,0 +1,44 @@
+// ignore_for_file: prefer_const_constructors
+
+import 'package:lightmeter/screens/metering/components/camera_container/event_container_camera.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(
+    '`ZoomChangedEvent`',
+    () {
+      final a = ZoomChangedEvent(1.0);
+      final b = ZoomChangedEvent(1.0);
+      final c = ZoomChangedEvent(2.0);
+      test('==', () {
+        expect(a == b && b == a, true);
+        expect(a != c && c != a, true);
+        expect(b != c && c != b, true);
+      });
+      test('hashCode', () {
+        expect(a.hashCode == b.hashCode, true);
+        expect(a.hashCode != c.hashCode, true);
+        expect(b.hashCode != c.hashCode, true);
+      });
+    },
+  );
+
+  group(
+    '`ExposureOffsetChangedEvent`',
+    () {
+      final a = ExposureOffsetChangedEvent(1.0);
+      final b = ExposureOffsetChangedEvent(1.0);
+      final c = ExposureOffsetChangedEvent(2.0);
+      test('==', () {
+        expect(a == b && b == a, true);
+        expect(a != c && c != a, true);
+        expect(b != c && c != b, true);
+      });
+      test('hashCode', () {
+        expect(a.hashCode == b.hashCode, true);
+        expect(a.hashCode != c.hashCode, true);
+        expect(b.hashCode != c.hashCode, true);
+      });
+    },
+  );
+}
diff --git a/test/screens/metering/components/camera/state_container_camera_test.dart b/test/screens/metering/components/camera/state_container_camera_test.dart
new file mode 100644
index 0000000..91a3eae
--- /dev/null
+++ b/test/screens/metering/components/camera/state_container_camera_test.dart
@@ -0,0 +1,64 @@
+// ignore_for_file: prefer_const_constructors
+
+import 'package:flutter/material.dart';
+import 'package:lightmeter/screens/metering/components/camera_container/models/camera_error_type.dart';
+import 'package:lightmeter/screens/metering/components/camera_container/state_container_camera.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(
+    '`CameraActiveState`',
+    () {
+      final a = CameraActiveState(
+        zoomRange: RangeValues(1, 7),
+        currentZoom: 1,
+        exposureOffsetRange: RangeValues(-4, 4),
+        currentExposureOffset: 0,
+        exposureOffsetStep: 0.167,
+      );
+      final b = CameraActiveState(
+        zoomRange: RangeValues(1, 7),
+        currentZoom: 1,
+        exposureOffsetRange: RangeValues(-4, 4),
+        currentExposureOffset: 0,
+        exposureOffsetStep: 0.167,
+      );
+      final c = CameraActiveState(
+        zoomRange: RangeValues(1, 4),
+        currentZoom: 3,
+        exposureOffsetRange: RangeValues(-2, 2),
+        currentExposureOffset: 0,
+        exposureOffsetStep: 0.167,
+      );
+      test('==', () {
+        expect(a == b && b == a, true);
+        expect(a != c && c != a, true);
+        expect(b != c && c != b, true);
+      });
+      test('hashCode', () {
+        expect(a.hashCode == b.hashCode, true);
+        expect(a.hashCode != c.hashCode, true);
+        expect(b.hashCode != c.hashCode, true);
+      });
+    },
+  );
+
+  group(
+    '`CameraErrorState`',
+    () {
+      final a = CameraErrorState(CameraErrorType.noCamerasDetected);
+      final b = CameraErrorState(CameraErrorType.noCamerasDetected);
+      final c = CameraErrorState(CameraErrorType.other);
+      test('==', () {
+        expect(a == b && b == a, true);
+        expect(a != c && c != a, true);
+        expect(b != c && c != b, true);
+      });
+      test('hashCode', () {
+        expect(a.hashCode == b.hashCode, true);
+        expect(a.hashCode != c.hashCode, true);
+        expect(b.hashCode != c.hashCode, true);
+      });
+    },
+  );
+}