diff -drup a/user_relationship_privatemsg/user_relationship_privatemsg.test b/user_relationship_privatemsg/user_relationship_privatemsg.test
--- a/user_relationship_privatemsg/user_relationship_privatemsg.test	Wed Jan 23 05:19:06 2013
+++ b/user_relationship_privatemsg/user_relationship_privatemsg.test	Thu Jan 24 10:18:49 2013
@@ -12,7 +12,7 @@ class UserRelationshipsPrivatemsgRecipie
   /**
    * Implements getInfo().
    */
-  function getInfo() {
+  public static function getInfo() {
     return array(
       'name' => t('User Relationships Privatemsg recipients'),
       'description' => t('Check relationship recipient type for privatemsg'),
@@ -24,14 +24,14 @@ class UserRelationshipsPrivatemsgRecipie
   /**
    * Enable required modules.
    */
-  function setUp() {
+  public function setUp() {
     return parent::setUp('privatemsg', 'user_relationships', 'user_relationships_ui', 'user_relationship_privatemsg');
   }
 
   /**
    * Tests sending a message to related users.
    */
-  function testSendToRelationship() {
+  public function testSendToRelationship() {
 
     // Create relationship.
     $relationship = array(
@@ -52,7 +52,7 @@ class UserRelationshipsPrivatemsgRecipie
 
     $admin = $this->drupalCreateUser(array('read privatemsg', 'write privatemsg', $have_permission, $request_permission, 'view relationship recipients', 'administer user relationships', $maintain_permission, 'write privatemsg to relationships', 'access user profiles'));
     $userA = $this->drupalCreateUser(array('read privatemsg', 'write privatemsg', $have_permission, $request_permission, 'view relationship recipients', 'write privatemsg to relationships'));
-    $userB = $this->drupalCreateUser(array('read privatemsg', 'write privatemsg', $have_permission, $request_permission, 'view relationship recipients'));
+    $userB = $this->drupalCreateUser(array('read privatemsg', 'write privatemsg', $have_permission, $request_permission, 'view relationship recipients', $maintain_permission));
 
     $this->drupalLogin($admin);
 
@@ -90,6 +90,16 @@ class UserRelationshipsPrivatemsgRecipie
     $reply = array('body[value]' => $this->randomName(50));
     $this->drupalPost(NULL, $reply, t('Send message'));
 
+    // Try to send a message to non-related userB.
+    $this->drupalGet('messages/new');
+    $message_to_b = array(
+      'recipient' => $userB->name,
+      'subject' => $this->randomName(),
+      'body[value]' => $this->randomName(50),
+    );
+    $this->drupalPost(NULL, $message_to_b, t('Send message'));
+    $this->assertText(t('@name does not have an established relationship with you.', array('@name' => $userB->name)), 'Sending to non-related user should fail.');
+
     // Login as userB and make sure the original message is displayed but not the message nor the username of userA.
     $this->drupalLogin($userB);
     $this->drupalGet('messages');
@@ -132,12 +142,80 @@ class UserRelationshipsPrivatemsgRecipie
     $this->drupalGet('messages');
     $this->clickLink($message['subject']);
     $this->assertText($message['body[value]']);
+
+    // Allow messages to unrelated users.
+    $edit = array(
+      'user_relationships_restrict_privatemsg' => 'all',
+    );
+    $this->drupalPost('admin/config/people/relationships/settings', $edit, t('Save configuration'));
+
+    // Switch to user A again.
+    $this->drupalLogin($userA);
+    // Try to send a message to non-related userB.
+    $this->drupalGet('messages/new');
+    $message_to_b = array(
+      'recipient' => $userB->name,
+      'subject' => $this->randomName(),
+      'body[value]' => $this->randomName(50),
+    );
+    $this->drupalPost(NULL, $message_to_b, t('Send message'));
+    $this->assertText(t('A message has been sent to @name.', array('@name' => $userB->name)), 'Sending to non-related user should succeed.');
+
+    // Block messages to unrelated users.
+    $this->drupalLogin($admin);
+    $edit = array(
+      'user_relationships_restrict_privatemsg' => 'relationships',
+    );
+    $this->drupalPost('admin/config/people/relationships/settings', $edit, t('Save configuration'));
+
+    // Change the relationship to make approval required.
+    $relationship = user_relationships_type_load(array('name' => $relationship['name']));
+    $relationship->requires_approval = TRUE;
+    user_relationships_type_save($relationship);
+    // Reset static caches.
+    user_relationships_types_load(TRUE);
+
+    // Switch to user A again.
+    $this->drupalLogin($userA);
+
+    // Send a relationship request from userA to userB.,
+    $this->drupalGet('relationship/' . $userB->uid . '/request/' . $userA->uid);
+    $this->drupalPost(NULL, array(), t('Send'));
+
+    // Try to send a message to not-yet-related userB.
+    $this->drupalGet('messages/new');
+    $message_to_b = array(
+      'recipient' => $userB->name,
+      'subject' => $this->randomName(),
+      'body[value]' => $this->randomName(50),
+    );
+    $this->drupalPost(NULL, $message_to_b, t('Send message'));
+    $this->assertText(t('@name does not have an established relationship with you.', array('@name' => $userB->name)), 'Sending to non-approved user should fail.');
+
+    // Switch to user B again to approve the request.
+    $this->drupalLogin($userB);
+    $this->drupalGet('user/' . $userB->uid . '/relationships/received');
+    $this->clickLink(t('Approve'));
+    $this->drupalPost(NULL, array(), t('Yes'));
+
+    // Now user A should be able to send a message.
+    $this->drupalLogin($userA);
+    // Try to send a message to userB.
+    $this->drupalGet('messages/new');
+    $message_to_b = array(
+      'recipient' => $userB->name,
+      'subject' => $this->randomName(),
+      'body[value]' => $this->randomName(50),
+    );
+    $this->drupalPost(NULL, $message_to_b, t('Send message'));
+    $this->assertText(t('A message has been sent to @name.', array('@name' => $userB->name)), 'Sending to approved related user should succeed.');
+
   }
 
   /**
    * Test a relationship with bath api processing.
    */
-  function testManyRelations() {
+  public function testManyRelations() {
 
     // Create relationship.
     $relationship = array(