diff --git a/tests/phpunit/data/blocks/fixtures/core__archives.server.html b/tests/phpunit/data/blocks/fixtures/core__archives.server.html
index fc1fd58758..e486140d45 100644
--- a/tests/phpunit/data/blocks/fixtures/core__archives.server.html
+++ b/tests/phpunit/data/blocks/fixtures/core__archives.server.html
@@ -1 +1 @@
-<div class="wp-block-archives">No archives to show.</div>
\ No newline at end of file
+<div class="wp-block-archives wp-block-archives-list">No archives to show.</div>
\ No newline at end of file
diff --git a/tests/phpunit/data/blocks/fixtures/core__archives__showPostCounts.server.html b/tests/phpunit/data/blocks/fixtures/core__archives__showPostCounts.server.html
index fc1fd58758..e486140d45 100644
--- a/tests/phpunit/data/blocks/fixtures/core__archives__showPostCounts.server.html
+++ b/tests/phpunit/data/blocks/fixtures/core__archives__showPostCounts.server.html
@@ -1 +1 @@
-<div class="wp-block-archives">No archives to show.</div>
\ No newline at end of file
+<div class="wp-block-archives wp-block-archives-list">No archives to show.</div>
\ No newline at end of file
diff --git a/tests/phpunit/data/blocks/fixtures/core__latest-posts__displayPostDate.server.html b/tests/phpunit/data/blocks/fixtures/core__latest-posts__displayPostDate.server.html
index b671f3d6ab..72e50931f0 100644
--- a/tests/phpunit/data/blocks/fixtures/core__latest-posts__displayPostDate.server.html
+++ b/tests/phpunit/data/blocks/fixtures/core__latest-posts__displayPostDate.server.html
@@ -1 +1 @@
-<ul class="wp-block-latest-posts"></ul>
+<ul class="wp-block-latest-posts has-dates"></ul>