diff --git a/tests/phpunit/data/blocks/fixtures/core__archives.server.html b/tests/phpunit/data/blocks/fixtures/core__archives.server.html
index eaed1525170d9..0eea15c010efa 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-list">No archives to show.</div>
\ No newline at end of file
+<div class=" wp-block-archives-list">No archives to show.</div>
\ No newline at end of file