diff --git a/x/lib/at-spi2-core.xml b/x/lib/at-spi2-core.xml
index f3d08f93af..a070e73e4e 100644
--- a/x/lib/at-spi2-core.xml
+++ b/x/lib/at-spi2-core.xml
@@ -122,9 +122,10 @@ ninja</userinput></screen>
 
     <para>
       A session bus address, normally available in an Xorg terminal,
-      is necessary to run the tests. To test the results,
-      issue: <command>ninja test</command>. The memory test is known
-      to timeout.
+      is necessary to run the tests. And, the test suite requires the 
+      glib schemas of the package already installed. To test the results,
+      install the package first, then issue: <command>ninja test</command>.
+      The memory test is known to timeout.
     </para>
 <!-- [pierre Sep 5th, 2020] the memory test passed for me with 2.36.1. -->
     <para>