diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2a48f40..94b583a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,9 +30,13 @@ jobs:
           name: PHPUnit
           command: |
             ENABLE_COVERAGE=false
-            if [ "<< parameters.php-version >>" == "8" ] && [ "$ENABLE_COVERAGE" == "true" ]; then
-              XDEBUG_MODE=coverage phpunit --coverage-clover clover.xml
-              coveralls --coverage_clover=clover.xml -v -o coveralls-upload.json
+            if [ "<< parameters.php-version >>" == "8.2" ]; then
+              if ["$ENABLE_COVERAGE" == "true"]; then
+                XDEBUG_MODE=coverage phpunit --coverage-clover clover.xml
+                coveralls --coverage_clover=clover.xml -v -o coveralls-upload.json
+              else
+                phpunit --display-deprecations
+              fi
             else
               phpunit
             fi
diff --git a/README.md b/README.md
index bbdacb7..9360d07 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,20 @@ class HelloWorldTest extends TestCase
 * Real CircleCI example
    * https://app.circleci.com/pipelines/github/pmvc/pmvc?branch=master
 
+## PHPUnit Tip
+* Show event
+```
+phpunit --log-events-text php://stdout
+```
+
+* show deprecations
+```
+phpunit --display-deprecations --testdox
+```
+
+* trigger PMVC dev dump
+   * https://github.com/pmvc-plugin/dev/blob/master/tests/DevWithPhpUnitTest.php
+
 
 
 ## Install with Composer
@@ -82,3 +96,5 @@ class HelloWorldTest extends TestCase
    * or
       * composer require pmvc-plugin/unit
 
+## Other Polyfills
+   * https://github.com/Yoast/PHPUnit-Polyfills
diff --git a/src/TestCase.php b/src/TestCase.php
index 73d8c31..decc34c 100644
--- a/src/TestCase.php
+++ b/src/TestCase.php
@@ -17,6 +17,22 @@ public function __construct(
             }
         }
     }
+    if (!class_exists('PHPUnit_Framework_MockObject_MockBuilder')) {
+        class PHPUnit_Framework_MockObject_MockBuilder
+        {
+            use \PMVC\Alias;
+            public $caller;
+            public function __construct(\PMVC\TestCase $testCase, string $type)
+            {
+                $this->setDefaultAlias(
+                    new \PHPUnit\Framework\MockObject\MockBuilder(
+                        $testCase,
+                        $type
+                    )
+                );
+            }
+        }
+    }
     if (!class_exists('TypeError')) {
         class TypeError extends Exception
         {
@@ -33,6 +49,19 @@ class TypeError extends Exception
         l(__DIR__ . '/TestCase-5');
     }
 
+    class PMVCMockBuilder extends \PHPUnit_Framework_MockObject_MockBuilder
+    {
+        use Alias;
+        public function pmvc_onlyMethods($methods)
+        {
+            if ($this->isCallable('onlyMethods')) {
+                return $this->onlyMethods($methods);
+            } else {
+                return $this->setMethods($methods);
+            }
+        }
+    }
+
     class PMVCUnitException extends \Exception
     {
         public function __construct(
@@ -90,6 +119,16 @@ private function _init()
             }
         }
 
+        protected function getPMVCMockBuilder($className)
+        {
+            return new PMVCMockBuilder($this, $className);
+        }
+
+        protected function dump()
+        {
+            fwrite(STDERR, print_r(func_get_args(), true));
+        }
+
         protected function altSetup()
         {
             $this->_init();
diff --git a/tests/src/PMVCMockBuilderTest.php b/tests/src/PMVCMockBuilderTest.php
new file mode 100644
index 0000000..9a969f9
--- /dev/null
+++ b/tests/src/PMVCMockBuilderTest.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace PMVC\PlugIn\unit;
+
+use PMVC\TestCase;
+
+class PMVCMockBuilderTest extends TestCase
+{
+    public function testGetPMVCMock()
+    {
+        $mock = $this->getPMVCMockBuilder(FakeDebugMock::class)
+            ->pmvc_onlyMethods(['a'])
+            ->getMock();
+        $mock->expects($this->atLeastOnce())->method('a');
+
+        $actual = $mock->a();
+        $this->assertEquals($actual, null);
+        $this->assertEquals((new FakeDebugMock())->a(), 'foo');
+    }
+}
+
+class FakeDebugMock
+{
+    public function a()
+    {
+        return 'foo';
+    }
+}