diff --git a/plugins/bc-blog/src/View/Helper/BlogHelper.php b/plugins/bc-blog/src/View/Helper/BlogHelper.php
index e5c3ed14cf..48306dcd87 100755
--- a/plugins/bc-blog/src/View/Helper/BlogHelper.php
+++ b/plugins/bc-blog/src/View/Helper/BlogHelper.php
@@ -1396,6 +1396,7 @@ public function getCategoryTitle(BlogPost $post)
      * @return string
      * @checked
      * @noTodo
+     * @unitTest
      */
     public function getPostId(BlogPost $post)
     {
diff --git a/plugins/bc-blog/tests/TestCase/View/Helper/BlogHelperTest.php b/plugins/bc-blog/tests/TestCase/View/Helper/BlogHelperTest.php
index e3370ac2f1..8775c5bf4f 100755
--- a/plugins/bc-blog/tests/TestCase/View/Helper/BlogHelperTest.php
+++ b/plugins/bc-blog/tests/TestCase/View/Helper/BlogHelperTest.php
@@ -1874,4 +1874,28 @@ public function test_getCategoryTitle()
         $result = $this->Blog->getCategoryTitle($blogPost);
         $this->assertEmpty($result);
     }
+
+    /**
+     * getPostId
+     */
+    public function test_getPostId()
+    {
+        // テストデータを作る
+        $this->loadFixtureScenario(InitAppScenario::class);
+        $this->Blog->getView()->setRequest($this->getRequest()->withAttribute('currentSite', SiteFactory::get(1)));
+        $post = new BlogPost([
+            'id' => 1,
+            'blog_content_id' => 1,
+            'name' => 'release',
+        ]);
+
+        //check exits id
+        $result = $this->Blog->getPostId($post);
+        $this->assertEquals(1, $result);
+
+        //check not exits id
+        $post = new BlogPost([]);
+        $result = $this->Blog->getPostId($post);
+        $this->assertEmpty($result);
+    }
 }