diff --git a/lib/Cake/Test/Case/Console/Command/TestShellTest.php b/lib/Cake/Test/Case/Console/Command/TestShellTest.php
index d9815ed85..46a4d64f6 100644
--- a/lib/Cake/Test/Case/Console/Command/TestShellTest.php
+++ b/lib/Cake/Test/Case/Console/Command/TestShellTest.php
@@ -49,6 +49,11 @@ class TestShellTest extends CakeTestCase {
  * @return void
  */
 	public function setUp() : void {
+		// This test can not be run with PHPUnit 9+.
+		// Because TestShell and CakeTestLoader depend on PHPUnit_Runner_StandardTestSuiteLoader.
+		// If run the test with the phpunit command, TestSuite Loader is also PHPUnit's to be used.
+		// Therefore, TestShell and CakeTestLoader are unnecessary.
+		$this->skipIf(version_compare(\PHPUnit\Runner\Version::id(), '9.0.0', '>='), 'This test can not be run with PHPUnit 9+');
 		parent::setUp();
 		$out = $this->getMock('ConsoleOutput', array(), array(), '', false);
 		$in = $this->getMock('ConsoleInput', array(), array(), '', false);
diff --git a/lib/Cake/Test/Case/TestSuite/HtmlCoverageReportTest.php b/lib/Cake/Test/Case/TestSuite/HtmlCoverageReportTest.php
index 2c418891e..d8299e0ed 100644
--- a/lib/Cake/Test/Case/TestSuite/HtmlCoverageReportTest.php
+++ b/lib/Cake/Test/Case/TestSuite/HtmlCoverageReportTest.php
@@ -34,6 +34,11 @@ class HtmlCoverageReportTest extends CakeTestCase {
  * @return void
  */
 	public function setUp() : void {
+		// This test can not be run with PHPUnit 9+.
+		// Because CakeBaseReporter depend on PHPUnit_TextUI_ResultPrinter.
+		// If run the test with the phpunit command, Result Printer is also PHPUnit's to be used.
+		// Therefore, CakeBaseReporter are unnecessary.
+		$this->skipIf(version_compare(\PHPUnit\Runner\Version::id(), '9.0.0', '>='), 'This test can not be run with PHPUnit 9+');
 		parent::setUp();
 		App::build(array(
 			'Plugin' => array(CAKE . 'Test' . DS . 'test_app' . DS . 'Plugin' . DS)