Fix tests.

tests/TestCase/Http/SessionTest.php

@@ -77,7 +77,7 @@ class SessionTest extends TestCase
      *
      * @var array
      */
-    public $fixtures = ['core.cake_sessions', 'core.sessions'];
+    public $fixtures = ['core.CakeSessions', 'core.Sessions'];
 
     /**
      * tearDown method

tests/TestCase/Routing/RequestActionTraitTest.php

@@ -32,7 +32,7 @@ class RequestActionTraitTest extends TestCase
      *
      * @var string
      */
-    public $fixtures = ['core.Comments', 'core.Posts', 'core.test_plugin_comments'];
+    public $fixtures = ['core.Comments', 'core.Posts', 'core.TestPluginComments'];
 
     /**
      * Setup

tests/TestCase/TestSuite/FixtureManagerTest.php

@@ -215,7 +215,7 @@ class FixtureManagerTest extends TestCase
         $this->loadPlugins(['TestPlugin']);
 
         $test = $this->getMockBuilder('Cake\TestSuite\TestCase')->getMock();
-        $test->fixtures = ['plugin.TestPlugin.blog/comments'];
+        $test->fixtures = ['plugin.TestPlugin.Blog/Comments'];
         $this->manager->fixturize($test);
         $fixtures = $this->manager->loaded();
         $this->assertCount(1, $fixtures);