diff --git a/composer.json b/composer.json
index 29e6f3c..28f30f3 100644
--- a/composer.json
+++ b/composer.json
@@ -21,8 +21,8 @@
     "php": ">=5.4.0"
   },
   "require-dev": {
-    "EHER/PHPUnit": ">=1.6",
-    "mockery/mockery": ">=0.7.2",
+    "phpunit/phpunit": ">=4.8.36 <6.0",
+    "mockery/mockery": ">=0.9 <1.0",
     "suin/xoopsunit": ">=1.2"
   },
   "autoload": {
diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index 8b38007..72014d8 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -10,3 +10,5 @@
 set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__DIR__) . '/src');
 
 date_default_timezone_set('UTC');
+
+class_exists('PHPUnit_Framework_TestCase') || class_alias('PHPUnit\Framework\TestCase', 'PHPUnit_Framework_TestCase');
diff --git a/tests/Suin/RSSWriter/ChannelTest.php b/tests/Suin/RSSWriter/ChannelTest.php
index 65b4131..39e9947 100644
--- a/tests/Suin/RSSWriter/ChannelTest.php
+++ b/tests/Suin/RSSWriter/ChannelTest.php
@@ -90,7 +90,7 @@ public function testPubsubhubbub()
 
     public function testAddItem()
     {
-        $item = $this->getMock($this->itemInterface);
+        $item = $this->createMock($this->itemInterface);
         $channel = new Channel();
         $this->assertSame($channel, $channel->addItem($item));
         $this->assertAttributeSame([$item], 'items', $channel);
@@ -99,7 +99,7 @@ public function testAddItem()
     public function testAppendTo()
     {
         $channel = new Channel();
-        $feed = $this->getMock($this->feedInterface);
+        $feed = $this->createMock($this->feedInterface);
         $feed->expects($this->once())->method('addChannel')->with($channel);
         $this->assertSame($channel, $channel->appendTo($feed));
     }
@@ -232,11 +232,11 @@ public function testAppendTo_with_items()
         $xml2 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><item><title>item2</title></item>');
         $xml3 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><item><title>item3</title></item>');
 
-        $item1 = $this->getMock($this->itemInterface);
+        $item1 = $this->createMock($this->itemInterface);
         $item1->expects($this->once())->method('asXML')->will($this->returnValue($xml1));
-        $item2 = $this->getMock($this->itemInterface);
+        $item2 = $this->createMock($this->itemInterface);
         $item2->expects($this->once())->method('asXML')->will($this->returnValue($xml2));
-        $item3 = $this->getMock($this->itemInterface);
+        $item3 = $this->createMock($this->itemInterface);
         $item3->expects($this->once())->method('asXML')->will($this->returnValue($xml3));
 
         $this->reveal($channel)
diff --git a/tests/Suin/RSSWriter/FeedTest.php b/tests/Suin/RSSWriter/FeedTest.php
index 97203f1..0897bbe 100644
--- a/tests/Suin/RSSWriter/FeedTest.php
+++ b/tests/Suin/RSSWriter/FeedTest.php
@@ -22,11 +22,11 @@ public function testRender()
         $xml1 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel1</title></channel>');
         $xml2 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel2</title></channel>');
         $xml3 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel3</title></channel>');
-        $channel1 = $this->getMock($this->channelInterface);
+        $channel1 = $this->createMock($this->channelInterface);
         $channel1->expects($this->once())->method('asXML')->will($this->returnValue($xml1));
-        $channel2 = $this->getMock($this->channelInterface);
+        $channel2 = $this->createMock($this->channelInterface);
         $channel2->expects($this->once())->method('asXML')->will($this->returnValue($xml2));
-        $channel3 = $this->getMock($this->channelInterface);
+        $channel3 = $this->createMock($this->channelInterface);
         $channel3->expects($this->once())->method('asXML')->will($this->returnValue($xml3));
         $this->reveal($feed)->attr('channels', [$channel1, $channel2, $channel3]);
         $expect = '<?xml version="1.0" encoding="UTF-8" ?>
@@ -45,11 +45,11 @@ public function testRender_with_japanese()
         $xml1 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>日本語1</title></channel>');
         $xml2 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>日本語2</title></channel>');
         $xml3 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>日本語3</title></channel>');
-        $channel1 = $this->getMock($this->channelInterface);
+        $channel1 = $this->createMock($this->channelInterface);
         $channel1->expects($this->once())->method('asXML')->will($this->returnValue($xml1));
-        $channel2 = $this->getMock($this->channelInterface);
+        $channel2 = $this->createMock($this->channelInterface);
         $channel2->expects($this->once())->method('asXML')->will($this->returnValue($xml2));
-        $channel3 = $this->getMock($this->channelInterface);
+        $channel3 = $this->createMock($this->channelInterface);
         $channel3->expects($this->once())->method('asXML')->will($this->returnValue($xml3));
         $this->reveal($feed)->attr('channels', [$channel1, $channel2, $channel3]);
         $expect = <<< 'XML'
@@ -77,11 +77,11 @@ public function test__toString()
         $xml1 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel1</title></channel>');
         $xml2 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel2</title></channel>');
         $xml3 = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><channel><title>channel3</title></channel>');
-        $channel1 = $this->getMock($this->channelInterface);
+        $channel1 = $this->createMock($this->channelInterface);
         $channel1->expects($this->once())->method('asXML')->will($this->returnValue($xml1));
-        $channel2 = $this->getMock($this->channelInterface);
+        $channel2 = $this->createMock($this->channelInterface);
         $channel2->expects($this->once())->method('asXML')->will($this->returnValue($xml2));
-        $channel3 = $this->getMock($this->channelInterface);
+        $channel3 = $this->createMock($this->channelInterface);
         $channel3->expects($this->once())->method('asXML')->will($this->returnValue($xml3));
         $this->reveal($feed)->attr('channels', [$channel1, $channel2, $channel3]);
         $expect = '<?xml version="1.0" encoding="UTF-8" ?>
diff --git a/tests/Suin/RSSWriter/ItemTest.php b/tests/Suin/RSSWriter/ItemTest.php
index 02e653f..e448998 100644
--- a/tests/Suin/RSSWriter/ItemTest.php
+++ b/tests/Suin/RSSWriter/ItemTest.php
@@ -126,7 +126,7 @@ public function testPubDate()
     public function testAppendTo()
     {
         $item = new Item();
-        $channel = $this->getMock($this->channelInterface);
+        $channel = $this->createMock($this->channelInterface);
         $channel->expects($this->once())->method('addItem')->with($item);
         $this->assertSame($item, $item->appendTo($channel));
     }