diff --git a/builtin/providers/postgresql/GNUmakefile b/builtin/providers/postgresql/GNUmakefile
index cdaa01f54..4d9f2875b 100644
--- a/builtin/providers/postgresql/GNUmakefile
+++ b/builtin/providers/postgresql/GNUmakefile
@@ -1,3 +1,10 @@
+# env TESTARGS='-test.parallel=1 -run TestAccPostgresqlSchema_AddPolicy' TF_LOG=warn make test
+#
+# NOTE: As of PostgreSQL 9.6.1 the -test.parallel=1 is required when
+# performing `DROP ROLE`-related actions.  This behavior and requirement
+# may change in the future and is likely not required when doing
+# non-delete related operations. But for now it is.
+
 POSTGRES?=/opt/local/lib/postgresql96/bin/postgres
 PSQL?=/opt/local/lib/postgresql96/bin/psql