diff --git a/pubspec.lock b/pubspec.lock
index fc8ae22..d59fe69 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,30 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: "0b2f2bd91ba804e53a61d757b986f89f1f9eaed5b11e4b2f5a2468d86d6c9fc7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "67.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "37577842a27e4338429a1cbc32679d508836510b056f1eedf0c8d20e39c1383d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.4.1"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: "7cf60b9f0cc88203c5a190b4cd62a99feea42759a7fa695010eb5de1c0b2252a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.0"
   async:
     dependency: transitive
     description:
@@ -17,6 +41,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "8.1.4"
+  bloc_test:
+    dependency: "direct dev"
+    description:
+      name: bloc_test
+      sha256: "165a6ec950d9252ebe36dc5335f2e6eb13055f33d56db0eeb7642768849b43d2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.1.7"
   boolean_selector:
     dependency: transitive
     description:
@@ -73,6 +105,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.18.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "3945034e86ea203af7a056d98e98e42a5518fff200d6e8e6647e1886b07e936e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.0"
   crypto:
     dependency: transitive
     description:
@@ -81,6 +129,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  diff_match_patch:
+    dependency: transitive
+    description:
+      name: diff_match_patch
+      sha256: "2efc9e6e8f449d0abe15be240e2c2a3bcd977c8d126cfd70598aee60af35c0a4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.1"
   equatable:
     dependency: "direct main"
     description:
@@ -155,6 +211,22 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
   http:
     dependency: "direct main"
     description:
@@ -163,6 +235,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.1"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "97486f20f9c2f7be8f514851703d0119c3596d14ea63227af6f7a481ef2b2f8b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
   http_parser:
     dependency: transitive
     description:
@@ -179,6 +259,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.19.0"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
   leak_tracker:
     dependency: transitive
     description:
@@ -211,6 +307,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.0"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
   matcher:
     dependency: transitive
     description:
@@ -235,6 +339,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.11.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "2e123074287cc9fd6c09de8336dae606d1ddb88d9ac47358826db698c176a1f2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  mocktail:
+    dependency: "direct dev"
+    description:
+      name: mocktail
+      sha256: c4b5007d91ca4f67256e720cb1b6d704e79a510183a12fa551021f652577dce6
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3"
   nested:
     dependency: transitive
     description:
@@ -243,6 +363,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
   octo_image:
     dependency: transitive
     description:
@@ -251,6 +379,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
   path:
     dependency: transitive
     description:
@@ -323,6 +459,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
   provider:
     dependency: transitive
     description:
@@ -331,6 +475,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.2"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
   rxdart:
     dependency: transitive
     description:
@@ -339,11 +491,59 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.27.7"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "708b3f6b97248e5781f493b765c3337db11c5d2c81c3094f10904bfa8004c703"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.12"
   source_span:
     dependency: transitive
     description:
@@ -416,6 +616,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.1"
+  test:
+    dependency: transitive
+    description:
+      name: test
+      sha256: a1f7595805820fcc05e5c52e3a231aedd0b72972cb333e8c738a8b1239448b6f
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.24.9"
   test_api:
     dependency: transitive
     description:
@@ -424,6 +632,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.1"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: a757b14fc47507060a162cc2530d9a4a2f92f5100a952c7443b5cad5ef5b106a
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.9"
   typed_data:
     dependency: transitive
     description:
@@ -456,6 +672,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "13.0.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   web:
     dependency: transitive
     description:
@@ -464,6 +688,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.5.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: "58c6666b342a38816b2e7e50ed0f1e261959630becd4c879c4f26bfa14aa5a42"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.5"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
   win32:
     dependency: transitive
     description:
@@ -480,6 +720,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.4"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
 sdks:
   dart: ">=3.3.2 <4.0.0"
   flutter: ">=3.16.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0a0c5c3..d7ab85d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -20,6 +20,8 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   flutter_lints: ^3.0.0
+  bloc_test: ^9.1.7
+  mocktail: ^1.0.3
 
 flutter:
   uses-material-design: true
diff --git a/test/features/picture_of_the_day/presentation/cubits/picture_of_the_day/picture_of_the_day_cubit_test.dart b/test/features/picture_of_the_day/presentation/cubits/picture_of_the_day/picture_of_the_day_cubit_test.dart
new file mode 100644
index 0000000..6b217a8
--- /dev/null
+++ b/test/features/picture_of_the_day/presentation/cubits/picture_of_the_day/picture_of_the_day_cubit_test.dart
@@ -0,0 +1,111 @@
+import 'package:bloc_test/bloc_test.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:nasa_potday/features/picture_of_the_day/domain/entities/picture_entity.dart';
+import 'package:nasa_potday/features/picture_of_the_day/domain/entities/pictures_page_entity.dart';
+import 'package:nasa_potday/features/picture_of_the_day/domain/repositories/nasa_repository.dart';
+import 'package:nasa_potday/features/picture_of_the_day/presentation/cubits/picture_of_the_day/picture_of_the_day_cubit.dart';
+
+class NasaRepositoryMock extends Mock implements NasaRepository {}
+
+void main() {
+  late NasaRepository nasaRepository;
+  late PictureOfTheDayCubit cubit;
+
+  setUp(() {
+    nasaRepository = NasaRepositoryMock();
+    cubit = PictureOfTheDayCubit(nasaRepository: nasaRepository);
+  });
+
+  final currentStartDate = DateTime(2024, 5, 7);
+  final pageWithoutPictures = PicturesPageEntity(
+    pictures: [],
+    startDate: currentStartDate,
+  );
+  final firstPageWithPictures = PicturesPageEntity(
+    pictures: [
+      PictureEntity(
+        url: Uri.parse(
+            'https://apod.nasa.gov/apod/image/2405/BlackHole_Simonnet_960.jpg'),
+        explanation: 'some explanation',
+        title: 'Black Hole Accreting with Jet',
+        date: DateTime(2024, 5, 7),
+        isVideo: false,
+      ),
+    ],
+    startDate: currentStartDate,
+  );
+  final secondPageWithPictures = PicturesPageEntity(
+    pictures: [
+      PictureEntity(
+        url: Uri.parse(
+            'https://apod.nasa.gov/apod/image/2405/BlackHole_Simonnet_960.jpg'),
+        explanation: 'some explanation',
+        title: 'Black Hole Accreting with Jet',
+        date: DateTime(2024, 5, 6),
+        isVideo: false,
+      ),
+    ],
+    startDate: DateTime(2024, 5, 6),
+  );
+
+  blocTest<PictureOfTheDayCubit, PictureOfTheDayState>(
+    'emits [PictureOfTheDayLoading, PictureOfTheDayFailed] when no pictures are loaded',
+    build: () => cubit,
+    setUp: () {
+      when(() => nasaRepository.loadInitialPage()).thenAnswer(
+        (_) async => pageWithoutPictures,
+      );
+    },
+    act: (cubit) => cubit.loadPictureOfTheDay(),
+    expect: () => const <PictureOfTheDayState>[
+      PictureOfTheDayLoading(),
+      PictureOfTheDayFailed(),
+    ],
+  );
+
+  blocTest<PictureOfTheDayCubit, PictureOfTheDayState>(
+    'emits [PictureOfTheDayLoading, PictureOfTheDayLoaded] when there are pictures loaded',
+    build: () => cubit,
+    setUp: () {
+      when(() => nasaRepository.loadInitialPage()).thenAnswer(
+        (_) async => firstPageWithPictures,
+      );
+    },
+    act: (cubit) => cubit.loadPictureOfTheDay(),
+    expect: () => <PictureOfTheDayState>[
+      const PictureOfTheDayLoading(),
+      PictureOfTheDayLoaded(
+        page: firstPageWithPictures,
+        isLoadingMore: false,
+      ),
+    ],
+  );
+
+  blocTest<PictureOfTheDayCubit, PictureOfTheDayState>(
+    'emits [PictureOfTheDayLoaded, PictureOfTheDayLoaded] when it loads more pictures',
+    build: () => cubit,
+    seed: () => PictureOfTheDayLoaded(
+      isLoadingMore: false,
+      page: firstPageWithPictures,
+    ),
+    setUp: () {
+      when(() =>
+              nasaRepository.loadNextPage(currentStartDate: currentStartDate))
+          .thenAnswer(
+        (_) async => secondPageWithPictures,
+      );
+    },
+    act: (cubit) => cubit.loadNextPage(),
+    expect: () => <PictureOfTheDayState>[
+      PictureOfTheDayLoaded(
+        page: firstPageWithPictures,
+        isLoadingMore: true,
+      ),
+      PictureOfTheDayLoaded(
+        page: firstPageWithPictures.merge(secondPageWithPictures),
+        isLoadingMore: false,
+      ),
+    ],
+  );
+}