diff --git a/modules/simpletest/tests/module.test b/modules/simpletest/tests/module.test
index c77f0a776078..0417a812d182 100644
--- a/modules/simpletest/tests/module.test
+++ b/modules/simpletest/tests/module.test
@@ -87,17 +87,17 @@ class ModuleUnitTest extends DrupalWebTestCase {
    */
   function testModuleImplements() {
     // Clear the cache.
-    cache_clear_all('module_implements', 'cache');
-    $this->assertFalse(cache_get('module_implements'), t('The module implements cache is empty.'));
+    cache_clear_all('module_implements', 'cache_bootstrap');
+    $this->assertFalse(cache_get('module_implements', 'cache_bootstrap'), t('The module implements cache is empty.'));
     $this->drupalGet('');
-    $this->assertTrue(cache_get('module_implements'), t('The module implements cache is populated after requesting a page.'));
+    $this->assertTrue(cache_get('module_implements', 'cache_bootstrap'), t('The module implements cache is populated after requesting a page.'));
 
     // Test again with an authenticated user.
     $this->user = $this->drupalCreateUser();
     $this->drupalLogin($this->user);
-    cache_clear_all('module_implements', 'cache');
+    cache_clear_all('module_implements', 'cache_bootstrap');
     $this->drupalGet('');
-    $this->assertTrue(cache_get('module_implements'), t('The module implements cache is populated after requesting a page.'));
+    $this->assertTrue(cache_get('module_implements', 'cache_bootstrap'), t('The module implements cache is populated after requesting a page.'));
   }
 }