diff --git a/modules/authcache_field/authcache_field.test b/modules/authcache_field/authcache_field.test
index c75d05e..91f9a0d 100644
--- a/modules/authcache_field/authcache_field.test
+++ b/modules/authcache_field/authcache_field.test
@@ -213,7 +213,7 @@ class AuthcacheFieldTest extends DrupalWebTestCase {
     $this->assertTrue($url);
 
     $result = $this->drupalGetAJAX($GLOBALS['base_root'] . $url['path'], $url['options'], array('X-Authcache: 1'));
-    $this->assertResponse(403);
+    $this->assertResponse(200);
     $this->assertFalse($result);
   }
 }
diff --git a/modules/authcache_flag/authcache_flag.test b/modules/authcache_flag/authcache_flag.test
index fd22ab3..f1a85e3 100644
--- a/modules/authcache_flag/authcache_flag.test
+++ b/modules/authcache_flag/authcache_flag.test
@@ -491,7 +491,7 @@ class AuthcacheFlagTest extends DrupalWebTestCase {
     $this->assertTrue($url);
 
     $result = $this->drupalGetAJAX($GLOBALS['base_root'] . $url['path'], $url['options'], array('X-Authcache: 1'));
-    $this->assertResponse(403);
+    $this->assertResponse(200);
     $this->assertFalse($result);
   }
 }
diff --git a/modules/authcache_p13n/includes/AuthcacheP13nFragmentAssemblyBuilder.inc b/modules/authcache_p13n/includes/AuthcacheP13nFragmentAssemblyBuilder.inc
index 243aff4..2285a98 100644
--- a/modules/authcache_p13n/includes/AuthcacheP13nFragmentAssemblyBuilder.inc
+++ b/modules/authcache_p13n/includes/AuthcacheP13nFragmentAssemblyBuilder.inc
@@ -65,15 +65,18 @@ class AuthcacheP13nFragmentAssemblyBuilder implements AuthcacheP13nContentBuilde
 
       // Run loader.
       if (!empty($partial['loader'])) {
-        $params = $partial['loader']->load($params, $context);
+        try {
+          $params = $partial['loader']->load($params, $context);
+        }
+        catch (AuthcacheP13nRequestNotFound $e) {
+          unset($e);
+          continue;
+        }
       }
 
       foreach ($params as $key => $subject) {
         // Run access check.
-        if (!empty($partial['access']) && !$partial['access']->check($user, $key, $subject, $context)) {
-          throw new AuthcacheP13nRequestAccessDenied();
-        }
-        else {
+        if (empty($partial['access']) || $partial['access']->check($user, $key, $subject, $context)) {
           $result[$paramname][$key] = $partial['renderer']->render($key, $subject, $context);
         }
       }
diff --git a/modules/authcache_p13n/tests/authcache_p13n.request-handler.test b/modules/authcache_p13n/tests/authcache_p13n.request-handler.test
index 05e7831..d7cc352 100644
--- a/modules/authcache_p13n/tests/authcache_p13n.request-handler.test
+++ b/modules/authcache_p13n/tests/authcache_p13n.request-handler.test
@@ -604,30 +604,32 @@ class AuthcacheP13nTestFragmentAssemblyBuilder extends DrupalUnitTestCase {
         'renderer' => new AuthcacheP13nTestEchoPartial(),
         'access' => new AuthcacheP13nTestEchoFragmentAccess(),
       ),
+      'inaccessible_param' => array(
+        'renderer' => new AuthcacheP13nTestEchoPartial(),
+        'access' => new AuthcacheP13nTestEchoFragmentAccess(),
+      ),
     );
     $builder = new AuthcacheP13nFragmentAssemblyBuilder($partials);
 
+    $expected = array(
+      'param_1' => array(
+        'account' => array('key' => 'account', 'subject' => $fake_user),
+      ),
+    );
+
     $user = $fake_user;
-    $input = array('a' => array('param_1' => array('account' => $fake_user)));
-    try {
-      $builder->build($input, array());
-      $this->pass('AuthcacheP13nFragmentAssemblyBuilder should not throw an AuthcacheP13nRequestAccessDenied when access check succeeds');
-    }
-    catch (AuthcacheP13nRequestAccessDenied $e) {
-      unset($e);
-      $this->fail('AuthcacheP13nFragmentAssemblyBuilder should not throw an AuthcacheP13nRequestAccessDenied when access check succeeds');
-    }
+    $input = array('a' => array(
+      'param_1' => array('account' => $fake_user),
+      'inaccessible_param' => array('account' => NULL)
+    ));
+    $result = $builder->build($input, array());
+    $this->assertEqual($result, $expected);
     $user = $orig_user;
 
     $user = $fake_user;
     $input = array('a' => array('param_1' => array('account' => FALSE)));
-    try {
-      $builder->build($input, array());
-      $this->fail('AuthcacheP13nFragmentAssemblyBuilder should throw an AuthcacheP13nRequestAccessDenied when access check fails');
-    }
-    catch (AuthcacheP13nRequestAccessDenied $e) {
-      $this->pass('AuthcacheP13nFragmentAssemblyBuilder should throw an AuthcacheP13nRequestAccessDenied when access check fails');
-    }
+    $result = $builder->build($input, array());
+    $this->assertFalse($result);
     $user = $orig_user;
   }
 
@@ -650,14 +652,8 @@ class AuthcacheP13nTestFragmentAssemblyBuilder extends DrupalUnitTestCase {
     $this->assertEqual($expect, $output);
 
     $input = array('a' => array('param_1' => array('load missing' => 'load missing')));
-    try {
-      $builder->build($input, array());
-      $this->fail('AuthcacheP13nFragmentAssemblyBuilder should throw an AuthcacheP13nRequestNotFound when loading fails');
-    }
-    catch (AuthcacheP13nRequestNotFound $e) {
-      unset($e);
-      $this->pass('AuthcacheP13nFragmentAssemblyBuilder should throw an AuthcacheP13nRequestNotFound when loading fails');
-    }
+    $result = $builder->build($input, array());
+    $this->assertFalse($result);
   }
 }