diff --git a/db/install.php b/db/install.php
index 26e3cbd..ec5dfdb 100644
--- a/db/install.php
+++ b/db/install.php
@@ -32,7 +32,9 @@
  * Installs the OEmbed filter.
  */
 function xmldb_filter_oembed_install() {
-    filter_set_global_state('filter/oembed', TEXTFILTER_ON);
+    if (!PHPUNIT_TEST) {
+        filter_set_global_state('filter/oembed', TEXTFILTER_ON);
+    }
 
     // Insert the initial data elements from the instance's providers.
     oembed::update_provider_data();