diff --git a/tests/phpunit/test-admin.php b/tests/phpunit/test-admin.php
index a154d8f..52437ab 100644
--- a/tests/phpunit/test-admin.php
+++ b/tests/phpunit/test-admin.php
@@ -3,8 +3,14 @@
  * Class AdminTest
  *
  * @package WPALLSTARS\PluginStarterTemplate
+ * @group wpmock
  */
 
+// Skip this test file if WP_Mock is not available or WordPress test framework is loaded.
+if ( ! class_exists( 'WP_Mock' ) || class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 use WPALLSTARS\PluginStarterTemplate\Admin\Admin;
 use WPALLSTARS\PluginStarterTemplate\Core;
 
diff --git a/tests/phpunit/test-core.php b/tests/phpunit/test-core.php
index fd83774..1cc9b36 100644
--- a/tests/phpunit/test-core.php
+++ b/tests/phpunit/test-core.php
@@ -3,8 +3,14 @@
  * Class CoreTest
  *
  * @package WPALLSTARS\PluginStarterTemplate
+ * @group wpmock
  */
 
+// Skip this test file if WP_Mock is not available or WordPress test framework is loaded.
+if ( ! class_exists( 'WP_Mock' ) || class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 use WPALLSTARS\PluginStarterTemplate\Core;
 
 /**
diff --git a/tests/phpunit/test-multisite.php b/tests/phpunit/test-multisite.php
index a9723f2..826609f 100644
--- a/tests/phpunit/test-multisite.php
+++ b/tests/phpunit/test-multisite.php
@@ -3,8 +3,14 @@
  * Class MultisiteTest
  *
  * @package WP_Plugin_Starter_Template_For_AI_Coding
+ * @group wordpress
  */
 
+// Skip this test file if WordPress test framework is not available.
+if ( ! class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 /**
  * Sample test case for the Multisite class.
  */