diff --git a/tests/phpunit/includes/bootstrap.php b/tests/phpunit/includes/bootstrap.php
index 65c1c370c4..876c81941e 100644
--- a/tests/phpunit/includes/bootstrap.php
+++ b/tests/phpunit/includes/bootstrap.php
@@ -144,6 +144,10 @@ $GLOBALS['_wp_die_disabled'] = false;
 tests_add_filter( 'wp_die_handler', '_wp_die_handler_filter' );
 // Use the Spy REST Server instead of default.
 tests_add_filter( 'wp_rest_server_class', '_wp_rest_server_class_filter' );
+// Prevent updating translations asynchronously.
+tests_add_filter( 'async_update_translation', '__return_false' );
+// Disable background updates.
+tests_add_filter( 'automatic_updater_disabled', '__return_true' );
 
 // Preset WordPress options defined in bootstrap file.
 // Used to activate themes, plugins, as well as other settings.