diff --git a/sync/class.jetpack-sync-module-comments.php b/sync/class.jetpack-sync-module-comments.php
index d19f16deaa354..992f191a57d7d 100644
--- a/sync/class.jetpack-sync-module-comments.php
+++ b/sync/class.jetpack-sync-module-comments.php
@@ -22,6 +22,8 @@ public function init_listeners( $callable ) {
 		add_action( 'spammed_comment', $callable );
 		add_action( 'trashed_post_comments', $callable, 10, 2 );
 		add_action( 'untrash_post_comments', $callable );
+		add_action( 'comment_approved_to_unapproved', $callable );
+		add_action( 'comment_unapproved_to_approved', $callable );
 
 		// even though it's messy, we implement these hooks because
 		// the edit_comment hook doesn't include the data
diff --git a/tests/php/sync/test_class.jetpack-sync-comments.php b/tests/php/sync/test_class.jetpack-sync-comments.php
index 049d20b5780c3..b1b721260839a 100644
--- a/tests/php/sync/test_class.jetpack-sync-comments.php
+++ b/tests/php/sync/test_class.jetpack-sync-comments.php
@@ -47,6 +47,38 @@ public function test_update_comment() {
 		$this->assertEquals( "foo bar baz", $remote_comment->comment_content );
 	}
 
+	public function test_unapprove_comment() {
+
+		$this->assertEquals( 1, $this->server_replica_storage->comment_count( 'approve' ) );
+		$this->comment->comment_approved = 0;
+		wp_update_comment( (array) $this->comment );
+
+		$this->sender->do_sync();
+
+		//Test both sync actions we're expecting
+		$this->assertEquals( 0, $this->server_replica_storage->comment_count( 'approve' ) );
+		$remote_comment = $this->server_replica_storage->get_comment( $this->comment->comment_ID );
+		$this->assertEquals( 0, $remote_comment->comment_approved );
+		$comment_unapproved_event = $this->server_event_storage->get_most_recent_event( 'comment_unapproved_' );
+		$this->assertTrue( (bool) $comment_unapproved_event );
+
+		$comment_approved_to_unapproved_event = $this->server_event_storage->get_most_recent_event( 'comment_approved_to_unapproved' );
+		$this->assertTrue( (bool) $comment_approved_to_unapproved_event );
+
+		//Test both sync actions again, this time without causing a change in state (comment_unapproved_ remains true despite no state change, while comment_approved_to_unapproved does not)
+
+		$this->server_event_storage->reset();
+
+		wp_update_comment( (array) $this->comment );
+		$this->sender->do_sync();
+
+		$comment_unapproved_event = $this->server_event_storage->get_most_recent_event( 'comment_unapproved_' );
+		$this->assertTrue( (bool) $comment_unapproved_event );
+
+		$comment_approved_to_unapproved_event = $this->server_event_storage->get_most_recent_event( 'comment_approved_to_unapproved' );
+		$this->assertFalse( (bool) $comment_approved_to_unapproved_event );
+	}
+
 	public function test_trash_comment_trashes_data() {
 		$this->assertEquals( 1, $this->server_replica_storage->comment_count( 'approve' ) );
 		wp_delete_comment( $this->comment->comment_ID );
@@ -75,6 +107,13 @@ public function test_wp_trash_comment() {
 
 		$this->assertEquals( 0, $this->server_replica_storage->comment_count( 'approve' ) );
 		$this->assertEquals( 1, $this->server_replica_storage->comment_count( 'trash' ) );
+
+		//Test that you don't get an event back when you try to trash the same comment again
+		$this->server_event_storage->reset();
+		wp_trash_comment( $this->comment->comment_ID );
+		$this->sender->do_sync();
+		$event = $this->server_event_storage->get_most_recent_event( 'trashed_comment' );
+		$this->assertFalse( $event );
 	}
 
 	public function test_wp_untrash_comment() {