diff --git a/model/Blog.php b/model/Blog.php
index 142e0ff..c0f0491 100755
--- a/model/Blog.php
+++ b/model/Blog.php
@@ -406,3 +406,9 @@ class Blog_Controller extends Page_Controller {
 	}
 
 }
+
+class ExtendedBlogPost extends BlogPost implements TestOnly {
+
+	private static $show_in_sitetree = true;
+
+}
\ No newline at end of file
diff --git a/tests/BlogCategoryTest.php b/tests/BlogCategoryTest.php
new file mode 100755
index 0000000..e4b7474
--- /dev/null
+++ b/tests/BlogCategoryTest.php
@@ -0,0 +1,27 @@
+<?php
+
+class BlogCategoryTest extends SapphireTest {
+	
+	static $fixture_file = "blog.yml";
+
+	public function setUp() {
+		SS_Datetime::set_mock_now("2013-10-10 20:00:00");
+		parent::setUp();
+	}
+
+
+	/**
+	 * Tests that any blog posts returned from $category->BlogPosts() many_many are published,
+	 * both by normal 'save & publish' functionality and by publish date.
+	**/
+	public function testBlogPosts() {
+		// Ensure the user is not logged in as admin (or anybody)
+		$member = Member::currentUser();
+		if($member) $member->logout();
+
+		$post = $this->objFromFixture("BlogPost", "blogpost1");
+		$category = $this->objFromFixture("BlogCategory", "firstcategory");
+		$this->assertEquals(1, $category->BlogPosts()->count(), "Category blog post count");
+	}
+
+}
diff --git a/tests/BlogTagTest.php b/tests/BlogTagTest.php
index 73c20eb..5c3332d 100755
--- a/tests/BlogTagTest.php
+++ b/tests/BlogTagTest.php
@@ -9,14 +9,18 @@ class BlogTagTest extends SapphireTest {
 		parent::setUp();
 	}
 
+	/**
+	 * Tests that any blog posts returned from $tag->BlogPosts() many_many are published,
+	 * both by normal 'save & publish' functionality and by publish date.
+	**/
 	public function testBlogPosts() {
+		// Ensure the user is not logged in as admin (or anybody)
 		$member = Member::currentUser();
 		if($member) $member->logout();
 
 		$post = $this->objFromFixture("BlogPost", "blogpost1");
 		$tag = $this->objFromFixture("BlogTag", "firsttag");
-		$posts = $tag->BlogPosts();
-		$this->assertEquals(1, $posts->count(), "Tag blog post count");
+		$this->assertEquals(1, $tag->BlogPosts()->count(), "Tag blog post count");
 	}
 
 }
diff --git a/tests/blog.yml b/tests/blog.yml
index c4f6c71..796a4e2 100755
--- a/tests/blog.yml
+++ b/tests/blog.yml
@@ -25,6 +25,7 @@ BlogPost:
     PublishDate: '2013-10-01 15:00:00'
     Parent: =>Blog.firstblog
     Tags: =>BlogTag.firsttag
+    Categories: =>BlogCategory.firstcategory
   blogpost2:
     Title: 'Second post'
     URLSegment: second-post
@@ -40,8 +41,10 @@ BlogPost:
     URLSegment: future-post
     PublishDate: '2015-01-01 00:00:00'
     Tags: =>BlogTag.firsttag
+    Categories: =>BlogCategory.firstcategory
   futurepost2:
     Title: 'Future Post 2'
     URLSegment: future-post-2
     PublishDate: '2013-11-01 00:00:00'
     Tags: =>BlogTag.firsttag
+    Categories: =>BlogCategory.firstcategory