✅ Okay codecov, so improved the coverage

tests/Versioning/Unknown/UnknownVersionComparatorTest.php

@@ -5,6 +5,7 @@
 namespace Siketyan\Loxcan\Versioning\Unknown;
 
 use PHPUnit\Framework\TestCase;
+use Siketyan\Loxcan\Versioning\SemVer\SemVerVersion;
 use Siketyan\Loxcan\Versioning\Simple\SimpleVersion;
 use Siketyan\Loxcan\Versioning\VersionDiff;
 use Siketyan\Loxcan\Versioning\VersionInterface;
@@ -39,6 +40,25 @@ public function test(): void
         );
     }
 
+    public function testSupports(): void
+    {
+        $this->assertTrue(
+            $this->comparator->supports(UnknownVersion::class, UnknownVersion::class),
+        );
+
+        $this->assertTrue(
+            $this->comparator->supports(SimpleVersion::class, UnknownVersion::class),
+        );
+
+        $this->assertTrue(
+            $this->comparator->supports(SemVerVersion::class, SimpleVersion::class),
+        );
+
+        $this->assertFalse(
+            $this->comparator->supports(UnknownVersion::class, VersionDiff::class),
+        );
+    }
+
     private function assertCompare(?int $type, VersionInterface $before, VersionInterface $after): void
     {
         $diff = $this->comparator->compare($before, $after);

tests/Versioning/Unknown/UnknownVersionTest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Siketyan\Loxcan\Versioning\Unknown;
+
+use PHPUnit\Framework\TestCase;
+
+class UnknownVersionTest extends TestCase
+{
+    private const VERSION = '1.2.3.4';
+
+    private UnknownVersion $version;
+
+    protected function setUp(): void
+    {
+        $this->version = new UnknownVersion(self::VERSION);
+    }
+
+    public function testToString(): void
+    {
+        $this->assertSame(
+            self::VERSION,
+            $this->version->__toString(),
+        );
+    }
+}