diff --git a/tests/modules/images/image-loading-optimization/optimization-tests.php b/tests/modules/images/image-loading-optimization/optimization-tests.php
index 4009300ad..0714ead3f 100644
--- a/tests/modules/images/image-loading-optimization/optimization-tests.php
+++ b/tests/modules/images/image-loading-optimization/optimization-tests.php
@@ -265,6 +265,53 @@ public function data_provider_test_ilo_optimize_template_output_buffer(): array
',
),
+ 'common-lcp-background-image-with-fully-populated-sample-data' => array(
+ 'set_up' => function () {
+ $slug = ilo_get_url_metrics_slug( ilo_get_normalized_query_vars() );
+ $sample_size = ilo_get_url_metrics_breakpoint_sample_size();
+ foreach ( array_merge( ilo_get_breakpoint_max_widths(), array( 1000 ) ) as $viewport_width ) {
+ for ( $i = 0; $i < $sample_size; $i++ ) {
+ ilo_store_url_metric(
+ home_url( '/' ),
+ $slug,
+ $this->get_validated_url_metric(
+ $viewport_width,
+ array(
+ array(
+ 'xpath' => '/*[0][self::HTML]/*[1][self::BODY]/*[0][self::DIV]',
+ 'isLCP' => true,
+ ),
+ )
+ )
+ );
+ }
+ }
+ },
+ 'buffer' => '
+
+
+
+ ...
+
+
+ This is so background!
+
+
+ ',
+ 'expected' => '
+
+
+
+ ...
+
+
+
+ This is so background!
+
+
+ ',
+ ),
+
'fetch-priority-high-already-on-common-lcp-image-with-fully-populated-sample-data' => array(
'set_up' => function () {
$slug = ilo_get_url_metrics_slug( ilo_get_normalized_query_vars() );