diff --git a/tests/phpunit/tests/comment/getPageOfComment.php b/tests/phpunit/tests/comment/getPageOfComment.php
index a4fd4cd865..d749076a86 100644
--- a/tests/phpunit/tests/comment/getPageOfComment.php
+++ b/tests/phpunit/tests/comment/getPageOfComment.php
@@ -60,6 +60,11 @@ class Tests_Comment_GetPageOfComment extends WP_UnitTestCase {
 	 * @ticket 11334
 	 */
 	public function test_subsequent_calls_should_hit_cache() {
+		// `get_page_of_comment()` calls `get_option()`, which is not properly cached when WP_INSTALLING.
+		if ( is_multisite() ) {
+			$this->markTestSkipped( 'Not testable in MS: wpmu_create_blog() defines WP_INSTALLING, which causes cache misses.' );
+		}
+
 		global $wpdb;
 
 		$p = $this->factory->post->create();