diff --git a/pubspec.lock b/pubspec.lock
index 538abf5..b00f476 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,22 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: e55636ed79578b9abca5fecf9437947798f5ef7456308b5cb85720b793eac92f
+      url: "https://pub.dev"
+    source: hosted
+    version: "82.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "13c1e6c6fd460522ea840abec3f677cc226f5fec7872c04ad7b425517ccf54f7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.4.4"
   args:
     dependency: "direct main"
     description:
@@ -9,6 +25,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.7.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: "758e6d74e971c3e5aceb4110bfd6698efc7f501675bcfe0c775459a8140750eb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.13.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  cli_config:
+    dependency: transitive
+    description:
+      name: cli_config
+      sha256: ac20a183a07002b700f0c25e61b7ee46b23c309d76ab7b7640a028f18e4d99ec
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   collection:
     dependency: "direct main"
     description:
@@ -17,6 +57,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "9086475ef2da7102a0c0a4e37e1e30707e7fb7b6d28c209f559a9c5f8ce42016"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.0"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.6"
   equatable:
     dependency: "direct main"
     description:
@@ -33,6 +97,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: "53385261521cc4a0c4658fd0ad07a7d14591cf8fc33abbceae306ddb974888dc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.2"
   lints:
     dependency: "direct dev"
     description:
@@ -41,6 +161,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: dc58c723c3c24bf8d3e2d3ad3f2f9d7bd9cf43ec6feaa64181775e60190153f2
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.17"
   meta:
     dependency: transitive
     description:
@@ -49,6 +185,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.16.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
   path:
     dependency: transitive
     description:
@@ -65,6 +225,78 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.0"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.2"
+  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: c87c3875f91262785dade62d135760c2c69cb217ac759485334c5857ad89f6e3
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.3"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "190222579a448b03896e0ca6eca5998fa810fda630c1d65e2f78b3f638f54812"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.13"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "254ee5351d6cb365c859e20ee823c3bb479bf4a293c22d17a9f1bf144ce86f7c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.1"
   sqflite_common:
     dependency: "direct main"
     description:
@@ -89,6 +321,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.7.5"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "8b27215b45d22309b5cddda1aa2b19bdfec9df0e765f2de506401c071d38d1b1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
   synchronized:
     dependency: transitive
     description:
@@ -97,6 +353,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.3.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "301b213cd241ca982e9ba50266bd3f5bd1ea33f1455554c5abb85d1be0e2d87e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.25.15"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: fb31f383e2ee25fbbfe06b40fe21e1e458d14080e3c67e7ba0acfde4df4e0bbd
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.4"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "84d17c3486c8dfdbe5e12a50c8ae176d15e2a771b96909a9442b40173649ccaa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.8"
   typed_data:
     dependency: transitive
     description:
@@ -105,6 +393,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: ddfa8d30d89985b96407efce8acbdd124701f96741f2d981ca860662f1c0dc02
+      url: "https://pub.dev"
+    source: hosted
+    version: "15.0.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "69da27e49efa56a15f8afe8f4438c4ec02eff0a117df1b22ea4aad194fe1c104"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
   web:
     dependency: transitive
     description:
@@ -113,6 +417,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: bfe6f435f6ec49cb6c01da1e275ae4228719e59a6b067048c51e72d9d63bcc4b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
   xml:
     dependency: "direct main"
     description:
@@ -121,5 +449,13 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.5.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
 sdks:
   dart: ">=3.7.0 <4.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index c031263..b97300f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -16,6 +16,7 @@ dependencies:
 
 dev_dependencies:
   lints: ^5.0.0
+  test: ^1.25.15
 
 executables:
   jadb: jadb
diff --git a/test/jouyou_kanji_test.dart b/test/jouyou_kanji_test.dart
new file mode 100644
index 0000000..01b9b30
--- /dev/null
+++ b/test/jouyou_kanji_test.dart
@@ -0,0 +1,9 @@
+import 'package:collection/collection.dart';
+import 'package:jadb/jouyou_kanji.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test("Assert 2136 kanji in jouyou set", () {
+    expect(JOUYOU_KANJI.values.flattenedToSet.length, 2136);
+  });
+}
diff --git a/test/romaji_transliteration_test.dart b/test/romaji_transliteration_test.dart
new file mode 100644
index 0000000..39d6582
--- /dev/null
+++ b/test/romaji_transliteration_test.dart
@@ -0,0 +1,66 @@
+import 'package:jadb/romaji_transliteration.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group("Romaji -> Hiragana", () {
+    test("Basic test", () {
+      final result = transliterateLatinToHiragana("katamari");
+      expect(result, "かたまり");
+    });
+
+    test("Basic test with diacritics", () {
+      final result = transliterateLatinToHiragana("gadamari");
+      expect(result, "がだまり");
+    });
+
+    test("wi and we", () {
+      final result = transliterateLatinToHiragana("wiwe");
+      expect(result, "うぃうぇ");
+    });
+
+    test("nb = mb", () {
+      final result = transliterateLatinToHiragana("kanpai");
+      expect(result, "かんぱい");
+
+      final result2 = transliterateLatinToHiragana("kampai");
+      expect(result2, "かんぱい");
+    });
+
+    test("Double n", () {
+      final result = transliterateLatinToHiragana("konnichiha");
+      expect(result, "こんにちは");
+    });
+
+    test("Double consonant", () {
+      final result = transliterateLatinToHiragana("kappa");
+      expect(result, "かっぱ");
+    });
+  });
+
+  group("Hiragana -> Romaji", () {
+    test("Basic test", () {
+      final result = transliterateHiraganaToLatin("かたまり");
+      expect(result, "katamari");
+    });
+
+    test("Basic test with diacritics", () {
+      final result = transliterateHiraganaToLatin("がだまり");
+      expect(result, "gadamari");
+    });
+
+    test("whi and whe", () {
+      final result = transliterateHiraganaToLatin("うぃうぇ");
+      expect(result, "whiwhe");
+    });
+
+    test("Double n", () {
+      final result = transliterateHiraganaToLatin("こんにちは");
+      expect(result, "konnichiha");
+    });
+
+    test("Double consonant", () {
+      final result = transliterateHiraganaToLatin("かっぱ");
+      expect(result, "kappa");
+    });
+  });
+}
diff --git a/test/search/kanji_search_test.dart b/test/search/kanji_search_test.dart
new file mode 100644
index 0000000..2a42d32
--- /dev/null
+++ b/test/search/kanji_search_test.dart
@@ -0,0 +1,26 @@
+import 'package:jadb/jouyou_kanji.dart';
+import 'package:test/test.dart';
+
+import 'setup_database_connection.dart';
+
+void main() {
+  test("Search a kanji", () async {
+    final connection = await setup_database_connection();
+
+    final result = await connection.searchKanji('漢');
+    expect(result, isNotNull);
+  });
+
+  group("Search all jouyou kanji", () {
+    JOUYOU_KANJI.forEach((grade, characters) {
+      test("Search all kanji in grade $grade", () async {
+        final connection = await setup_database_connection();
+
+        for (final character in characters) {
+          final result = await connection.searchKanji(character);
+          expect(result, isNotNull);
+        }
+      }, timeout: Timeout.factor(10));
+    });
+  });
+}
diff --git a/test/search/setup_database_connection.dart b/test/search/setup_database_connection.dart
new file mode 100644
index 0000000..f983a50
--- /dev/null
+++ b/test/search/setup_database_connection.dart
@@ -0,0 +1,34 @@
+import 'dart:ffi';
+import 'dart:io';
+
+import 'package:jadb/search.dart';
+import 'package:sqflite_common_ffi/sqflite_ffi.dart';
+import 'package:sqlite3/open.dart';
+
+Future<JaDBConnection> setup_database_connection() async {
+  final lib_sqlite_path = Platform.environment['LIBSQLITE_PATH'];
+  final jadb_path = Platform.environment['JADB_PATH'];
+
+  if (lib_sqlite_path == null) {
+    throw Exception("LIBSQLITE_PATH is not set");
+  }
+
+  if (jadb_path == null) {
+    throw Exception("JADB_PATH is not set");
+  }
+
+  final db_connection = createDatabaseFactoryFfi(ffiInit: () {
+    open.overrideForAll(
+      () => DynamicLibrary.open(lib_sqlite_path),
+    );
+  }).openDatabase(
+    jadb_path,
+    options: OpenDatabaseOptions(
+      onOpen: (db) {
+        db.execute("PRAGMA foreign_keys = ON");
+      },
+    ),
+  );
+
+  return JaDBConnection(await db_connection);
+}
diff --git a/test/search/word_search_test.dart b/test/search/word_search_test.dart
new file mode 100644
index 0000000..75c204a
--- /dev/null
+++ b/test/search/word_search_test.dart
@@ -0,0 +1,26 @@
+import 'package:test/test.dart';
+
+import 'setup_database_connection.dart';
+
+void main() {
+  test("Search a word", () async {
+    final connection = await setup_database_connection();
+
+    final result = await connection.searchWord("kana");
+    expect(result, isNotNull);
+  });
+
+  test(
+    "Serialize all words",
+    () async {
+      final connection = await setup_database_connection();
+
+      // Test serializing all words
+      for (final letter in "aiueoksthnmyrw".split("")) {
+        await connection.searchWord(letter);
+      }
+    },
+    timeout: Timeout.factor(100),
+    skip: "Very slow test",
+  );
+}