diff --git a/tests/tests/connectors/test-class-connector-posts.php b/tests/tests/connectors/test-class-connector-posts.php
index f9fc5bfc8..daf617359 100644
--- a/tests/tests/connectors/test-class-connector-posts.php
+++ b/tests/tests/connectors/test-class-connector-posts.php
@@ -2,16 +2,31 @@
 namespace WP_Stream;
 
 class Test_WP_Stream_Connector_Posts extends WP_StreamTestCase {
+	/**
+	 * Holds local timestamp in "Y-m-d H:i:s" format
+	 *
+	 * @var string
+	 */
 	private $date;
+
+	/**
+	 * Holds GMT timestamp in "Y-m-d H:i:s" format
+	 *
+	 * @var string
+	 */
 	private $date_gmt;
 
+	/**
+	 * Runs before each test.
+	 */
 	public function setUp() {
 		parent::setUp();
 
+		// Set static timestamps.
 		$this->date     = '2007-07-04 12:30:00';
 		$this->date_gmt = get_gmt_from_date( $this->date );
 
-		// Make partial of Connector_ACF class, with mocked "log" function.
+		// Make partial of Connector_Posts class, with mocked "log" function.
 		$this->mock = $this->getMockBuilder( Connector_Posts::class )
 			->setMethods( [ 'log' ] )
 			->getMock();
@@ -20,8 +35,12 @@ public function setUp() {
 		$this->mock->register();
 	}
 
+	/**
+	 * Tests "transition_post_status" callback function.
+	 */
 	public function test_callback_transition_post_status() {
-		$this->mock->expects( $this->atLeastOnce() )
+		// Set expected calls for the Mock.
+		$this->mock->expects( $this->once() )
 			->method( 'log' )
 			->with(
 				$this->equalTo(
@@ -47,7 +66,7 @@ public function test_callback_transition_post_status() {
 				$this->equalTo( 'updated' )
 			);
 
-		// Do stuff
+		// Create post and trigger mock.
 		wp_insert_post(
 			array(
 				'post_title'    => 'Test post',
@@ -58,10 +77,15 @@ public function test_callback_transition_post_status() {
 			)
 		);
 
+		// Confirm callback execution.
 		$this->assertFalse( 0 === did_action( 'wp_stream_test_callback_transition_post_status' ) );
 	}
 
+	/**
+	 * Tests "deleted_post" callback function.
+	 */
 	public function test_callback_deleted_post() {
+		// Create post for later use.
 		$post_id = wp_insert_post(
 			array(
 				'post_title'    => 'Test post',
@@ -70,7 +94,8 @@ public function test_callback_deleted_post() {
 			)
 		);
 
-		$this->mock->expects( $this->atLeastOnce() )
+		// Set expected calls for the Mock.
+		$this->mock->expects( $this->once() )
 			->method( 'log' )
 			->with(
 				$this->equalTo(
@@ -91,9 +116,10 @@ public function test_callback_deleted_post() {
 				$this->equalTo( 'deleted' )
 			);
 
-		// Do stuff
+		// Delete post and trigger mock.
 		wp_delete_post( $post_id, true );
 
+		// Confirm callback execution.
 		$this->assertFalse( 0 === did_action( 'wp_stream_test_callback_deleted_post' ) );
 	}