diff --git a/library/HTMLPurifier/ConfigSchema.php b/library/HTMLPurifier/ConfigSchema.php
index ac473675..a55a9b79 100644
--- a/library/HTMLPurifier/ConfigSchema.php
+++ b/library/HTMLPurifier/ConfigSchema.php
@@ -80,8 +80,16 @@ class HTMLPurifier_ConfigSchema {
         return HTMLPurifier_ConfigSchema::$singleton;
     }
     
+    /**
+     * Throws an E_USER_NOTICE stating that a method is deprecated.
+     */
+    private static function deprecated($method) {
+        trigger_error("Static HTMLPurifier_ConfigSchema::$method deprecated, use add*() method instead", E_USER_NOTICE);
+    }
+    
     /** @see HTMLPurifier_ConfigSchema->set() */
     public static function define($namespace, $name, $default, $type, $description) {
+        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
         $def =& HTMLPurifier_ConfigSchema::instance();
         $def->add($namespace, $name, $default, $type, $description);
     }
@@ -155,6 +163,7 @@ class HTMLPurifier_ConfigSchema {
     
     /** @see HTMLPurifier_ConfigSchema->addNamespace() */
     public static function defineNamespace($namespace, $description) {
+        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
         $def =& HTMLPurifier_ConfigSchema::instance();
         $def->addNamespace($namespace, $description);
     }
@@ -189,6 +198,7 @@ class HTMLPurifier_ConfigSchema {
     
     /** @see HTMLPurifier_ConfigSchema->addValueAliases() */
     public static function defineValueAliases($namespace, $name, $aliases) {
+        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
         $def =& HTMLPurifier_ConfigSchema::instance();
         $def->addValueAliases($namespace, $name, $aliases);
     }
@@ -230,6 +240,7 @@ class HTMLPurifier_ConfigSchema {
     
     /** @see HTMLPurifier_ConfigSchema->addAllowedValues() */
     public static function defineAllowedValues($namespace, $name, $allowed_values) {
+        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
         $def =& HTMLPurifier_ConfigSchema::instance();
         $def->addAllowedValues($namespace, $name, $allowed_values);
     }
@@ -273,6 +284,7 @@ class HTMLPurifier_ConfigSchema {
     
     /** @see HTMLPurifier_ConfigSchema->addAlias() */
     public static function defineAlias($namespace, $name, $new_namespace, $new_name) {
+        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
         $def =& HTMLPurifier_ConfigSchema::instance();
         $def->addAlias($namespace, $name, $new_namespace, $new_name);
     }
diff --git a/tests/HTMLPurifier/DefinitionCacheTest.php b/tests/HTMLPurifier/DefinitionCacheTest.php
index aac6ebf6..58ba8867 100644
--- a/tests/HTMLPurifier/DefinitionCacheTest.php
+++ b/tests/HTMLPurifier/DefinitionCacheTest.php
@@ -7,13 +7,6 @@ class HTMLPurifier_DefinitionCacheTest extends HTMLPurifier_Harness
         // using null subclass because parent is abstract
         $cache = new HTMLPurifier_DefinitionCache_Null('Test');
         
-        $old_copy = HTMLPurifier_ConfigSchema::instance();
-        $o = new HTMLPurifier_ConfigSchema();
-        HTMLPurifier_ConfigSchema::instance($o);
-        
-        HTMLPurifier_ConfigSchema::defineNamespace('Test', 'Test namespace');
-        HTMLPurifier_ConfigSchema::define('Test', 'DefinitionRev', 1, 'int', 'Definition revision.');
-        
         generate_mock_once('HTMLPurifier_Config');
         $config = new HTMLPurifier_ConfigMock();
         $config->version = '1.0.0'; // hopefully no conflicts
@@ -31,8 +24,6 @@ class HTMLPurifier_DefinitionCacheTest extends HTMLPurifier_Harness
         $this->assertIdentical($cache->isOld('1.0.0-hash2-1', $config), false); // if hash is different, don't touch!
         $this->assertIdentical($cache->isOld('1.0.0beta-hash2-11', $config), true);
         
-        HTMLPurifier_ConfigSchema::instance($old_copy);
-        
     }
     
 }