diff --git a/tests/phpunit/tests/comment.php b/tests/phpunit/tests/comment.php
index 5b20528727..3b80334353 100644
--- a/tests/phpunit/tests/comment.php
+++ b/tests/phpunit/tests/comment.php
@@ -687,4 +687,82 @@ class Tests_Comment extends WP_UnitTestCase {
 			$this->assertSame( $expected[ $field ], $length );
 		}
 	}
+
+	public function test_update_should_invalidate_comment_cache() {
+		global $wpdb;
+
+		$c = self::factory()->comment->create( array( 'comment_author' => 'Foo' ) );
+
+		$comment = get_comment( $c );
+		$this->assertSame( 'Foo', $comment->comment_author );
+
+		wp_update_comment( array(
+			'comment_ID' => $c,
+			'comment_author' => 'Bar',
+		) );
+
+		$comment = get_comment( $c );
+
+		$this->assertSame( 'Bar', $comment->comment_author );
+	}
+
+	public function test_trash_should_invalidate_comment_cache() {
+		global $wpdb;
+
+		$c = self::factory()->comment->create();
+
+		$comment = get_comment( $c );
+
+		wp_trash_comment( $c );
+
+		$comment = get_comment( $c );
+
+		$this->assertSame( 'trash', $comment->comment_approved );
+	}
+
+	public function test_untrash_should_invalidate_comment_cache() {
+		global $wpdb;
+
+		$c = self::factory()->comment->create();
+		wp_trash_comment( $c );
+
+		$comment = get_comment( $c );
+		$this->assertSame( 'trash', $comment->comment_approved );
+
+		wp_untrash_comment( $c );
+
+		$comment = get_comment( $c );
+
+		$this->assertSame( '1', $comment->comment_approved );
+	}
+
+	public function test_spam_should_invalidate_comment_cache() {
+		global $wpdb;
+
+		$c = self::factory()->comment->create();
+
+		$comment = get_comment( $c );
+
+		wp_spam_comment( $c );
+
+		$comment = get_comment( $c );
+
+		$this->assertSame( 'spam', $comment->comment_approved );
+	}
+
+	public function test_unspam_should_invalidate_comment_cache() {
+		global $wpdb;
+
+		$c = self::factory()->comment->create();
+		wp_spam_comment( $c );
+
+		$comment = get_comment( $c );
+		$this->assertSame( 'spam', $comment->comment_approved );
+
+		wp_unspam_comment( $c );
+
+		$comment = get_comment( $c );
+
+		$this->assertSame( '1', $comment->comment_approved );
+	}
 }