diff --git a/src/tools/pginclude/README b/src/tools/pginclude/README
index 35f8220526..10b1494d4d 100644
--- a/src/tools/pginclude/README
+++ b/src/tools/pginclude/README
@@ -38,3 +38,6 @@ file 1 might then need to include file 3.  For this reason, the
 pgcompinclude and pgrminclude /src/include steps must be run several
 times until all includes compile cleanly.
 
+Also, tests should be done with configure settings of --enable-cassert
+and EXEC_BACKEND on and off.
+