diff --git a/src/test/regress/isolation_schedule b/src/test/regress/isolation_schedule
index db8b0033c..a2583034a 100644
--- a/src/test/regress/isolation_schedule
+++ b/src/test/regress/isolation_schedule
@@ -93,6 +93,7 @@ test: isolation_replicated_dist_on_mx
 # MXless tests
 test: isolation_check_mx
 test: isolation_replicate_reference_tables_to_coordinator
+test: isolation_turn_mx_off
 test: isolation_reference_copy_vs_all
 test: isolation_ref2ref_foreign_keys
 test: isolation_multiuser_locking