diff --git a/tests/Integration/Database/DatabaseCacheStoreTest.php b/tests/Integration/Database/DatabaseCacheStoreTest.php
index 1f5bac9835d0..86264fb81891 100644
--- a/tests/Integration/Database/DatabaseCacheStoreTest.php
+++ b/tests/Integration/Database/DatabaseCacheStoreTest.php
@@ -41,6 +41,66 @@ public function testValueCanUpdateExistCacheInTransaction()
         $this->assertSame('new-bar', $store->get('foo'));
     }
 
+    public function testAddOperationCanStoreNewCache()
+    {
+        $store = $this->getStore();
+
+        $result = $store->add('foo', 'bar', 60);
+
+        $this->assertTrue($result);
+        $this->assertSame('bar', $store->get('foo'));
+    }
+
+    public function testAddOperationShouldNotUpdateExistCache()
+    {
+        $store = $this->getStore();
+
+        $store->add('foo', 'bar', 60);
+        $result = $store->add('foo', 'new-bar', 60);
+
+        $this->assertFalse($result);
+        $this->assertSame('bar', $store->get('foo'));
+    }
+
+    public function testAddOperationShouldNotUpdateExistCacheInTransaction()
+    {
+        $store = $this->getStore();
+
+        $store->add('foo', 'bar', 60);
+
+        DB::beginTransaction();
+        $result = $store->add('foo', 'new-bar', 60);
+        DB::commit();
+
+        $this->assertFalse($result);
+        $this->assertSame('bar', $store->get('foo'));
+    }
+
+    public function testAddOperationCanUpdateIfCacheExpired()
+    {
+        $store = $this->getStore();
+
+        $store->add('foo', 'bar', 0);
+        $result = $store->add('foo', 'new-bar', 60);
+
+        $this->assertTrue($result);
+        $this->assertSame('new-bar', $store->get('foo'));
+    }
+
+    public function testAddOperationCanUpdateIfCacheExpiredInTransaction()
+    {
+        $store = $this->getStore();
+
+        $store->add('foo', 'bar', 0);
+
+        DB::beginTransaction();
+        $result = $store->add('foo', 'new-bar', 60);
+        DB::commit();
+
+        $this->assertTrue($result);
+        $this->assertSame('new-bar', $store->get('foo'));
+    }
+
     protected function getStore()
     {
         return Cache::store('database');