diff --git a/src/IpRanges.php b/src/IpRanges.php
index caebdeb..6e95f4a 100644
--- a/src/IpRanges.php
+++ b/src/IpRanges.php
@@ -18,7 +18,6 @@ final class IpRanges
 
     /**
      * Default network aliases.
-     *
      * @see https://datatracker.ietf.org/doc/html/rfc5735#section-4
      */
     public const DEFAULT_NETWORKS = [
@@ -97,7 +96,7 @@ public function getRanges(): array
     }
 
     /**
-     * Get custom network aliases, that can be used in {@see $ranges}.
+     * Get network aliases, that can be used in {@see $ranges}.
      *
      * @return array Network aliases.
      *
diff --git a/tests/IpRangesTest.php b/tests/IpRangesTest.php
new file mode 100644
index 0000000..cf9e379
--- /dev/null
+++ b/tests/IpRangesTest.php
@@ -0,0 +1,159 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\NetworkUtilities\Tests;
+
+use InvalidArgumentException;
+use PHPUnit\Framework\TestCase;
+use Yiisoft\NetworkUtilities\IpRanges;
+
+final class IpRangesTest extends TestCase
+{
+    public function testNetworkAliasException(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Network alias "*" already set as default');
+        new IpRanges(['*'], ['*' => ['wrong']]);
+    }
+
+    public static function dataGetNetworks(): array
+    {
+        return [
+            'default' => [
+                [],
+                [
+                    '*' => ['any'],
+                    'any' => ['0.0.0.0/0', '::/0'],
+                    'private' => ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fd00::/8'],
+                    'multicast' => ['224.0.0.0/4', 'ff00::/8'],
+                    'linklocal' => ['169.254.0.0/16', 'fe80::/10'],
+                    'localhost' => ['127.0.0.0/8', '::1'],
+                    'documentation' => ['192.0.2.0/24', '198.51.100.0/24', '203.0.113.0/24', '2001:db8::/32'],
+                    'system' => ['multicast', 'linklocal', 'localhost', 'documentation'],
+                ],
+            ],
+            'custom' => [
+                ['custom' => ['1.1.1.1/1', '2.2.2.2/2']],
+                [
+                    '*' => ['any'],
+                    'any' => ['0.0.0.0/0', '::/0'],
+                    'private' => ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fd00::/8'],
+                    'multicast' => ['224.0.0.0/4', 'ff00::/8'],
+                    'linklocal' => ['169.254.0.0/16', 'fe80::/10'],
+                    'localhost' => ['127.0.0.0/8', '::1'],
+                    'documentation' => ['192.0.2.0/24', '198.51.100.0/24', '203.0.113.0/24', '2001:db8::/32'],
+                    'system' => ['multicast', 'linklocal', 'localhost', 'documentation'],
+                    'custom' => ['1.1.1.1/1', '2.2.2.2/2'],
+                ],
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider dataGetNetworks
+     */
+    public function testGetNetworks(array $networks, array $expected): void
+    {
+        $ipRanges = new IpRanges([], $networks);
+        $this->assertSame($expected, $ipRanges->getNetworks());
+    }
+
+    public static function dataGetRange(): array
+    {
+        return [
+            'ipv4' => [['10.0.0.1'], ['10.0.0.1']],
+            'any' => [['192.168.0.32', 'fa::/32', 'any'], ['192.168.0.32', 'fa::/32', '0.0.0.0/0', '::/0']],
+            'ipv4+!private' => [
+                ['10.0.0.1', '!private'],
+                ['10.0.0.1', '!10.0.0.0/8', '!172.16.0.0/12', '!192.168.0.0/16', '!fd00::/8'],
+            ],
+            'private+!system' => [
+                ['private', '!system'],
+                [
+                    '10.0.0.0/8',
+                    '172.16.0.0/12',
+                    '192.168.0.0/16',
+                    'fd00::/8',
+                    '!224.0.0.0/4',
+                    '!ff00::/8',
+                    '!169.254.0.0/16',
+                    '!fe80::/10',
+                    '!127.0.0.0/8',
+                    '!::1',
+                    '!192.0.2.0/24',
+                    '!198.51.100.0/24',
+                    '!203.0.113.0/24',
+                    '!2001:db8::/32',
+                ],
+            ],
+            'containing duplicates' => [
+                ['10.0.0.1', '10.0.0.2', '10.0.0.2', '10.0.0.3'],
+                ['10.0.0.1', '10.0.0.2', 3 => '10.0.0.3'],
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider dataGetRange
+     */
+    public function testGetRange(array $ranges, array $expected): void
+    {
+        $ipRanges = new IpRanges($ranges);
+        $this->assertSame($expected, $ipRanges->getRanges());
+    }
+
+    public static function dataIsAllowed(): array
+    {
+        return [
+            [true, '192.168.10.11'],
+            [true, '10.0.0.1', ['10.0.0.1', '!10.0.0.0/8', '!babe::/8', 'any']],
+            [true, '192.168.5.101', ['10.0.0.1', '!10.0.0.0/8', '!babe::/8', 'any']],
+            [true, 'cafe::babe', ['10.0.0.1', '!10.0.0.0/8', '!babe::/8', 'any']],
+            [true, '10.0.1.2', ['10.0.1.0/24']],
+            [true, '10.0.1.2', ['10.0.1.0/24']],
+            [true, '127.0.0.1', ['!10.0.1.0/24', '10.0.0.0/8', 'localhost']],
+            [true, '10.0.1.2', ['10.0.1.0/24', '!10.0.0.0/8', 'localhost']],
+            [true, '127.0.0.1', ['10.0.1.0/24', '!10.0.0.0/8', 'localhost']],
+            [true, '10.0.1.28/28', ['10.0.1.0/24', '!10.0.0.0/8', 'localhost']],
+            [true, '2001:db0:1:1::6', ['2001:db0:1:1::/64']],
+            [true, '2001:db0:1:2::7', ['2001:db0:1:2::/64']],
+            [true, '2001:db0:1:2::7', ['2001:db0:1:2::/64', '!2001:db0::/32']],
+            [true, '10.0.1.2', ['10.0.1.0/24']],
+            [true, '2001:db0:1:2::7', ['10.0.1.0/24', '2001:db0:1:2::/64', '127.0.0.1']],
+            [true, '10.0.1.2', ['10.0.1.0/24', '2001:db0:1:2::/64', '127.0.0.1']],
+            [true, '8.8.8.8', ['!system', 'any']],
+            [true, '10.0.1.2', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+            [true, '2001:db0:1:2::7', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+            [true, '127.0.0.1', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+            [true, '10.0.1.28/28', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+            [true, '1.2.3.4', ['myNetworkEu'], ['myNetworkEu' => ['1.2.3.4/10', '5.6.7.8']]],
+            [true, '5.6.7.8', ['myNetworkEu'], ['myNetworkEu' => ['1.2.3.4/10', '5.6.7.8']]],
+            [false, 'babe::cafe', ['10.0.0.1', '!10.0.0.0/8', '!babe::/8', 'any']],
+            [false, '10.0.0.2', ['10.0.0.1', '!10.0.0.0/8', '!babe::/8', 'any']],
+            [false, '192.5.1.1', ['10.0.1.0/24']],
+            [false, '10.0.3.2', ['10.0.1.0/24']],
+            [false, '10.0.1.2', ['!10.0.1.0/24', '10.0.0.0/8', 'localhost']],
+            [false, '10.2.2.2', ['10.0.1.0/24', '!10.0.0.0/8', 'localhost']],
+            [false, '10.0.1.1/22', ['10.0.1.0/24', '!10.0.0.0/8', 'localhost']],
+            [false, '2001:db0:1:2::7', ['2001:db0:1:1::/64']],
+            [false, '2001:db0:1:2::7', ['!2001:db0::/32', '2001:db0:1:2::/64']],
+            [false, '192.5.1.1', ['10.0.1.0/24']],
+            [false, '2001:db0:1:2::7', ['10.0.1.0/24']],
+            [false, '10.0.3.2', ['10.0.1.0/24', '2001:db0:1:2::/64', '127.0.0.1']],
+            [false, '127.0.0.1', ['!system', 'any']],
+            [false, 'fe80::face', ['!system', 'any']],
+            [false, '10.2.2.2', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+            [false, '10.0.1.1/22', ['10.0.1.0/24', '2001:db0:1:2::/64', 'localhost', '!any']],
+        ];
+    }
+
+    /**
+     * @dataProvider dataIsAllowed
+     */
+    public function testIsAllowed(bool $expected, string $ip, array $ranges = [], array $networks = []): void
+    {
+        $ipRanges = new IpRanges($ranges, $networks);
+        $this->assertSame($expected, $ipRanges->isAllowed($ip));
+    }
+}