diff --git a/tests/ZM/Store/LightCacheTest.php b/tests/ZM/Store/LightCacheTest.php
new file mode 100644
index 00000000..76c4b9dc
--- /dev/null
+++ b/tests/ZM/Store/LightCacheTest.php
@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\ZM\Store;
+
+use PHPUnit\Framework\TestCase;
+use ZM\Store\LightCache;
+
+/**
+ * @internal
+ */
+class LightCacheTest extends TestCase
+{
+    protected function tearDown(): void
+    {
+        LightCache::unset('test');
+        LightCache::unset('test2');
+    }
+
+    public function testSetAndGet(): void
+    {
+        $result = LightCache::set('test', 'value');
+
+        $this->assertTrue($result);
+        $this->assertSame('value', LightCache::get('test'));
+    }
+
+    public function testUnset(): void
+    {
+        LightCache::set('test', 'value');
+        $this->assertTrue(LightCache::unset('test'));
+        $this->assertNull(LightCache::get('test'));
+        $this->assertFalse(LightCache::unset('test'));
+    }
+
+    public function testGetAll(): void
+    {
+        LightCache::set('test', 'value');
+        LightCache::set('test2', 'value2');
+
+        $this->assertSame(['test' => 'value', 'test2' => 'value2'], LightCache::getAll());
+    }
+
+    public function testItemCanExpire(): void
+    {
+        LightCache::set('test', 'value', 1);
+        $this->assertSame('value', LightCache::get('test'));
+        zm_sleep(2);
+        $this->assertNull(LightCache::get('test'));
+    }
+
+    public function testGetExpire(): void
+    {
+        LightCache::set('test', 'value', 10);
+        $this->assertSame(10, LightCache::getExpire('test'));
+    }
+
+    public function testGetExpireTS(): void
+    {
+        LightCache::set('test', 'value', 10);
+        $this->assertSame(time() + 10, LightCache::getExpireTS('test'));
+    }
+
+    public function testIsset(): void
+    {
+        LightCache::set('test', 'value');
+        $this->assertTrue(LightCache::isset('test'));
+        $this->assertFalse(LightCache::isset('test2'));
+    }
+
+    public function testGetMemoryUsage(): void
+    {
+        LightCache::set('test', 'value');
+        $this->assertGreaterThan(0, LightCache::getMemoryUsage());
+    }
+
+    public function testUpdate(): void
+    {
+        LightCache::set('test', 'value');
+        $this->assertTrue(LightCache::update('test', 'value2'));
+        $this->assertSame('value2', LightCache::get('test'));
+    }
+}