diff --git a/.gitignore b/.gitignore
index 723ef36..8925195 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
-.idea
\ No newline at end of file
+.idea
+vendor
+composer.lock
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..92e29de
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,16 @@
+language: php
+
+php:
+  - 7.1
+  - 7.2
+  - nightly
+
+install:
+  - travis_retry composer self-update
+  - travis_retry composer install --no-interaction --no-suggest --prefer-dist --dev
+
+script:
+  - vendor/bin/phpunit --coverage-clover=coverage.xml
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
\ No newline at end of file
diff --git a/README.md b/README.md
index 31f38f0..71af58e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # PHP Banks DB
 
+[![Build Status](https://travis-ci.com/chekalskiy/php-bank-db.svg?branch=master)](https://travis-ci.com/chekalskiy/php-bank-db) [![codecov](https://codecov.io/gh/chekalskiy/php-bank-db/branch/master/graph/badge.svg)](https://codecov.io/gh/chekalskiy/php-bank-db)
+
 > It is a PHP port of [ramoona's banks-db](https://github.com/ramoona/banks-db).
 
 Returns bank's name and brand color by bank card number's first digits (BIN, Issuer Identification Numbers, IIN).
diff --git a/composer.json b/composer.json
index 2055d79..b35c756 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,10 @@
     }
   ],
   "require": {
-    "php": ">=7.0"
+    "php": ">=7.1"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^7"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..13b1d2b
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php">
+    <filter>
+        <whitelist>
+            <directory>./src</directory>
+        </whitelist>
+    </filter>
+    <testsuites>
+        <testsuite name="all">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
\ No newline at end of file
diff --git a/src/BankDb.php b/src/BankDb.php
index 1c68ba3..af1af91 100644
--- a/src/BankDb.php
+++ b/src/BankDb.php
@@ -10,11 +10,6 @@ class BankDb
      */
     protected $database = [];
 
-    /**
-     * @var string
-     */
-    protected $database_file_path;
-
     /**
      * BankDb constructor.
      *
@@ -25,7 +20,6 @@ class BankDb
     public function __construct(string $db_file_path = null)
     {
         $this->initializeDatabase($db_file_path);
-        $this->loadDatabase();
     }
 
     /**
@@ -57,7 +51,7 @@ public function getBankInfo(string $card_number): BankInfo
      *
      * @throws BankDbException
      */
-    protected function initializeDatabase(string $db_file_path = null)
+    protected function initializeDatabase(string $db_file_path = null): void
     {
         if ($db_file_path === null) {
             $db_file_path = __DIR__ . '/../db/bank_db.php';
@@ -67,15 +61,7 @@ protected function initializeDatabase(string $db_file_path = null)
             throw new BankDbException('Cannot find DB file');
         }
 
-        $this->database_file_path = $db_file_path;
-    }
-
-    /**
-     * Database preload
-     */
-    protected function loadDatabase()
-    {
-        $this->database = include $this->database_file_path;
+        $this->database = include $db_file_path;
     }
 
     /**
diff --git a/src/BankInfo.php b/src/BankInfo.php
index 76258d8..03a5696 100644
--- a/src/BankInfo.php
+++ b/src/BankInfo.php
@@ -28,19 +28,23 @@ class BankInfo
     protected $card_type = 'unknown';
 
     /**
+     * @see https://github.com/braintree/credit-card-type/blob/master/index.js
+     * @see https://en.wikipedia.org/wiki/Payment_card_number
+     * @see https://github.com/ramoona/banks-db/blob/2a882c921e4c4e1d1ee452e97671aedfbe325abe/type.js
+     *
      * @var array
      */
     protected static $card_prefixes = [
         'electron' => '/^(4026|417500|4405|4508|4844|4913|4917)/',
         'interpayment' => '/^636/',
-        'unionpay' => '/^62/',
-        'maestro' => '/^(50|56|57|58|6)/',
+        'unionpay' => '/^(62|88)/',
+        'discover' => '/^6(?:011|4|5)/',
+        'maestro' => '/^(50|5[6-9]|6)/',
         'visa' => '/^4/',
-        'mastercard' => '/^(5[1-5]|[2221-2720])/',
+        'mastercard' => '/^(5[1-5]|(?:222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720))/', // [2221-2720]
         'amex' => '/^3[47]/',
-        'diners' => '/^3(?:0[0-5]|[68][0-9])/',
-        'discover' => '/^6(?:011|5[0-9]{2})/',
-        'jcb' => '/^(?:2131|1800|[3528-3589])/',
+        'diners' => '/^3(?:0([0-5]|95)|[689])/',
+        'jcb' => '/^(?:2131|1800|(?:352[89]|35[3-8][0-9]))/', // 3528-3589
         'mir' => '/^220[0-4]/',
     ];
 
@@ -63,6 +67,7 @@ public function __construct(array $data, string $prefix = '')
         foreach (self::$card_prefixes as $card_type => $card_prefix) {
             if (preg_match($card_prefix, $prefix)) {
                 $this->card_type = $card_type;
+                break;
             }
         }
     }
@@ -70,7 +75,7 @@ public function __construct(array $data, string $prefix = '')
     /**
      * Make this bank object unknown
      */
-    protected function makeUnknown()
+    protected function makeUnknown(): void
     {
         $this->is_unknown = true;
         $this->data = [
@@ -83,7 +88,7 @@ protected function makeUnknown()
         ];
     }
 
-    public function getName(bool $is_local = true): string
+    public function getTitle(bool $is_local = true): string
     {
         if ($is_local && isset($this->data['localTitle'])) {
             return $this->data['localTitle'];
diff --git a/tests/BankDbTest.php b/tests/BankDbTest.php
new file mode 100644
index 0000000..1e4b75f
--- /dev/null
+++ b/tests/BankDbTest.php
@@ -0,0 +1,38 @@
+<?php
+declare(strict_types=1);
+
+namespace BankDb;
+
+use PHPUnit\Framework\TestCase;
+
+class BankDbTest extends TestCase
+{
+    /**
+     * @var BankDb
+     */
+    protected $bank_db;
+
+    protected function setUp()
+    {
+        $this->bank_db = new BankDb();
+    }
+
+    public function testCanBeConstructed(): void
+    {
+        $this->assertNotEmpty($this->bank_db);
+    }
+
+    public function testExceptionIfDatabaseNotFound(): void
+    {
+        $this->expectException(BankDbException::class);
+
+        new BankDb('/unknown/path');
+    }
+
+    public function testGetBankInfoIsWorking(): void
+    {
+        $bank_info = $this->bank_db->getBankInfo('400000');
+
+        $this->assertTrue($bank_info->isUnknown());
+    }
+}
diff --git a/tests/BankInfoTest.php b/tests/BankInfoTest.php
new file mode 100644
index 0000000..572f543
--- /dev/null
+++ b/tests/BankInfoTest.php
@@ -0,0 +1,129 @@
+<?php
+declare(strict_types=1);
+
+namespace BankDb;
+
+use PHPUnit\Framework\TestCase;
+
+class BankInfoTest extends TestCase
+{
+    /**
+     * @var BankDb
+     */
+    protected $bank_db;
+
+    /**
+     * @var string
+     */
+    protected $valid_prefix = '428906';
+
+    protected function setUp()
+    {
+        $this->bank_db = new BankDb();
+    }
+
+    public function testAnyInput(): void
+    {
+        $bank_info_1 = $this->bank_db->getBankInfo('5321 30');
+        $bank_info_2 = $this->bank_db->getBankInfo('532130');
+        $bank_info_3 = $this->bank_db->getBankInfo('5!3_2l1$3*0');
+        $bank_info_4 = $this->bank_db->getBankInfo('5321300000000000');
+        $bank_info_5 = $this->bank_db->getBankInfo('');
+
+        $this->assertFalse($bank_info_1->isUnknown());
+        $this->assertSame($bank_info_2->getTitle(), $bank_info_1->getTitle());
+        $this->assertSame($bank_info_3->getTitle(), $bank_info_1->getTitle());
+        $this->assertSame($bank_info_4->getTitle(), $bank_info_1->getTitle());
+        $this->assertTrue($bank_info_5->isUnknown());
+    }
+
+    public function testCardTypes(): void
+    {
+        // amex
+        $this->assertSame('amex', $this->bank_db->getBankInfo('340000')->getCardType());
+        $this->assertSame('amex', $this->bank_db->getBankInfo('370000')->getCardType());
+
+        // unionpay
+        $this->assertSame('unionpay', $this->bank_db->getBankInfo('620000')->getCardType());
+        $this->assertSame('unionpay', $this->bank_db->getBankInfo('880000')->getCardType());
+
+        // discover
+        $this->assertSame('discover', $this->bank_db->getBankInfo('601100')->getCardType());
+        $this->assertSame('discover', $this->bank_db->getBankInfo('640000')->getCardType());
+        $this->assertSame('discover', $this->bank_db->getBankInfo('650000')->getCardType());
+
+        // electron
+        $this->assertSame('electron', $this->bank_db->getBankInfo('402600')->getCardType());
+        $this->assertSame('electron', $this->bank_db->getBankInfo('417500')->getCardType());
+
+        // interpayment
+        $this->assertSame('interpayment', $this->bank_db->getBankInfo('636000')->getCardType());
+
+        // maestro
+        $this->assertSame('maestro', $this->bank_db->getBankInfo('501800')->getCardType());
+        $this->assertSame('maestro', $this->bank_db->getBankInfo('561200')->getCardType());
+        $this->assertSame('maestro', $this->bank_db->getBankInfo('589300')->getCardType());
+        $this->assertSame('maestro', $this->bank_db->getBankInfo('630400')->getCardType());
+        $this->assertSame('maestro', $this->bank_db->getBankInfo('639000')->getCardType());
+
+        // visa
+        $this->assertSame('visa', $this->bank_db->getBankInfo('411111')->getCardType());
+        $this->assertSame('visa', $this->bank_db->getBankInfo('400000')->getCardType());
+
+        // mastercard
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('510000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('520000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('530000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('540000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('550000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('222100')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('259000')->getCardType());
+        $this->assertSame('mastercard', $this->bank_db->getBankInfo('272000')->getCardType());
+
+        // diners
+        $this->assertSame('diners', $this->bank_db->getBankInfo('360000')->getCardType());
+        $this->assertSame('diners', $this->bank_db->getBankInfo('300000')->getCardType());
+        $this->assertSame('diners', $this->bank_db->getBankInfo('305000')->getCardType());
+        $this->assertSame('diners', $this->bank_db->getBankInfo('309500')->getCardType());
+        $this->assertSame('diners', $this->bank_db->getBankInfo('380000')->getCardType());
+        $this->assertSame('diners', $this->bank_db->getBankInfo('390000')->getCardType());
+
+        // jcb
+        $this->assertSame('jcb', $this->bank_db->getBankInfo('352800')->getCardType());
+        $this->assertSame('jcb', $this->bank_db->getBankInfo('355000')->getCardType());
+        $this->assertSame('jcb', $this->bank_db->getBankInfo('358900')->getCardType());
+
+        // mir
+        $this->assertSame('mir', $this->bank_db->getBankInfo('220000')->getCardType());
+        $this->assertSame('mir', $this->bank_db->getBankInfo('220400')->getCardType());
+    }
+
+    public function testBanks(): void
+    {
+        $this->assertSame('Rocketbank', $this->bank_db->getBankInfo('532130')->getTitle(false));
+        $this->assertSame('Alfa-Bank', $this->bank_db->getBankInfo($this->valid_prefix)->getTitle(false));
+
+        // $this->assertSame('Millennium', $this->bank_db->getBankInfo('487474')->getTitle(false));
+    }
+
+    public function testColor(): void
+    {
+        $this->assertRegExp('/^#[a-f0-9]{6}$/', $this->bank_db->getBankInfo($this->valid_prefix)->getColor());
+        $this->assertRegExp('/^#[a-f0-9]{6}$/', $this->bank_db->getBankInfo('')->getColor());
+    }
+
+    public function testCountryCode(): void
+    {
+        $this->assertSame('ru', $this->bank_db->getBankInfo($this->valid_prefix)->getCountryCode());
+    }
+
+    public function testUrl(): void
+    {
+        $this->assertRegExp('/^https?:\/\//', $this->bank_db->getBankInfo($this->valid_prefix)->getUrl());
+    }
+
+    public function testDefunct(): void
+    {
+        $this->assertFalse($this->bank_db->getBankInfo($this->valid_prefix)->isDefunct());
+    }
+}