diff --git a/module/instance/test/lib/instance.unittest.class.php b/module/instance/test/lib/instance.unittest.class.php
index 56fd20d93a..eebb98e407 100644
--- a/module/instance/test/lib/instance.unittest.class.php
+++ b/module/instance/test/lib/instance.unittest.class.php
@@ -88,4 +88,19 @@ class instanceTest
 
         return $result;
     }
+
+    /**
+     * Test k8nameExists method.
+     *
+     * @param  string $k8name
+     * @access public
+     * @return mixed
+     */
+    public function k8nameExistsTest(string $k8name)
+    {
+        $result = $this->objectModel->k8nameExists($k8name);
+        if(dao::isError()) return dao::getError();
+
+        return $result;
+    }
 }
\ No newline at end of file
diff --git a/module/instance/test/model/k8nameexists.php b/module/instance/test/model/k8nameexists.php
new file mode 100755
index 0000000000..9abb449061
--- /dev/null
+++ b/module/instance/test/model/k8nameexists.php
@@ -0,0 +1,35 @@
+#!/usr/bin/env php
+<?php
+
+/**
+
+title=测试 instanceModel::k8nameExists();
+timeout=0
+cid=0
+
+- 执行instanceTest模块的k8nameExistsTest方法，参数是'test-k8name-1'  @1
+- 执行instanceTest模块的k8nameExistsTest方法，参数是'nonexistent-k8name'  @0
+- 执行instanceTest模块的k8nameExistsTest方法，参数是''  @0
+- 执行instanceTest模块的k8nameExistsTest方法，参数是'test-k8name-5'  @0
+- 执行instanceTest模块的k8nameExistsTest方法，参数是'test-k8name-special'  @0
+
+*/
+
+include dirname(__FILE__, 5) . '/test/lib/init.php';
+include dirname(__FILE__, 2) . '/lib/instance.unittest.class.php';
+
+$table = zenData('instance');
+$table->id->range('1-5');
+$table->k8name->range('test-k8name-1,test-k8name-2,test-k8name-3,test-k8name-4,test-k8name-5');
+$table->deleted->range('0{4},1');
+$table->gen(5);
+
+su('admin');
+
+$instanceTest = new instanceTest();
+
+r($instanceTest->k8nameExistsTest('test-k8name-1')) && p() && e('1');
+r($instanceTest->k8nameExistsTest('nonexistent-k8name')) && p() && e('0');
+r($instanceTest->k8nameExistsTest('')) && p() && e('0');
+r($instanceTest->k8nameExistsTest('test-k8name-5')) && p() && e('0');
+r($instanceTest->k8nameExistsTest('test-k8name-special')) && p() && e('0');
\ No newline at end of file