diff --git a/cache/tests/cache_test.php b/cache/tests/cache_test.php
index 7f402d56b6c..edef90db99d 100644
--- a/cache/tests/cache_test.php
+++ b/cache/tests/cache_test.php
@@ -627,6 +627,15 @@ class cache_phpunit_tests extends advanced_testcase {
                 'crazyevent'
             )
         ));
+        $instance->phpunit_add_definition('phpunit/eventpurgetestpersistent', array(
+            'mode' => cache_store::MODE_APPLICATION,
+            'component' => 'phpunit',
+            'area' => 'eventpurgetestpersistent',
+            'persistent' => true,
+            'invalidationevents' => array(
+                'crazyevent'
+            )
+        ));
         $cache = cache::make('phpunit', 'eventpurgetest');
 
         $this->assertTrue($cache->set('testkey1', 'test data 1'));
@@ -640,6 +649,71 @@ class cache_phpunit_tests extends advanced_testcase {
         // Check things have been removed.
         $this->assertFalse($cache->get('testkey1'));
         $this->assertFalse($cache->get('testkey2'));
+
+        // Now test the persistent cache.
+        $cache = cache::make('phpunit', 'eventpurgetestpersistent');
+        $this->assertTrue($cache->set('testkey1', 'test data 1'));
+        $this->assertEquals('test data 1', $cache->get('testkey1'));
+        $this->assertTrue($cache->set('testkey2', 'test data 2'));
+        $this->assertEquals('test data 2', $cache->get('testkey2'));
+
+        // Purge the event.
+        cache_helper::purge_by_event('crazyevent');
+
+        // Check things have been removed.
+        $this->assertFalse($cache->get('testkey1'));
+        $this->assertFalse($cache->get('testkey2'));
+    }
+
+    /**
+     * Tests session cache event purge
+     */
+    public function test_session_event_purge() {
+        $instance = cache_config_phpunittest::instance();
+        $instance->phpunit_add_definition('phpunit/eventpurgetest', array(
+            'mode' => cache_store::MODE_SESSION,
+            'component' => 'phpunit',
+            'area' => 'eventpurgetest',
+            'invalidationevents' => array(
+                'crazyevent'
+            )
+        ));
+        $instance->phpunit_add_definition('phpunit/eventpurgetestpersistent', array(
+            'mode' => cache_store::MODE_SESSION,
+            'component' => 'phpunit',
+            'area' => 'eventpurgetestpersistent',
+            'persistent' => true,
+            'invalidationevents' => array(
+                'crazyevent'
+            )
+        ));
+        $cache = cache::make('phpunit', 'eventpurgetest');
+
+        $this->assertTrue($cache->set('testkey1', 'test data 1'));
+        $this->assertEquals('test data 1', $cache->get('testkey1'));
+        $this->assertTrue($cache->set('testkey2', 'test data 2'));
+        $this->assertEquals('test data 2', $cache->get('testkey2'));
+
+        // Purge the event.
+        cache_helper::purge_by_event('crazyevent');
+
+        // Check things have been removed.
+        $this->assertFalse($cache->get('testkey1'));
+        $this->assertFalse($cache->get('testkey2'));
+
+        // Now test the persistent cache.
+        $cache = cache::make('phpunit', 'eventpurgetestpersistent');
+        $this->assertTrue($cache->set('testkey1', 'test data 1'));
+        $this->assertEquals('test data 1', $cache->get('testkey1'));
+        $this->assertTrue($cache->set('testkey2', 'test data 2'));
+        $this->assertEquals('test data 2', $cache->get('testkey2'));
+
+        // Purge the event.
+        cache_helper::purge_by_event('crazyevent');
+
+        // Check things have been removed.
+        $this->assertFalse($cache->get('testkey1'));
+        $this->assertFalse($cache->get('testkey2'));
     }
 
     /**
diff --git a/cache/tests/fixtures/lib.php b/cache/tests/fixtures/lib.php
index 471521b2556..42ce92b13d4 100644
--- a/cache/tests/fixtures/lib.php
+++ b/cache/tests/fixtures/lib.php
@@ -46,7 +46,7 @@ class cache_config_phpunittest extends cache_config_writer {
                 case cache_store::MODE_APPLICATION:
                     $properties['overrideclass'] = 'cache_phpunit_application';
                     break;
-                case cache_store::MDOE_SESSION:
+                case cache_store::MODE_SESSION:
                     $properties['overrideclass'] = 'cache_phpunit_session';
                     break;
                 case cache_store::MODE_REQUEST: