diff --git a/internal/db/sqltest/README.md b/internal/db/sqltest/README.md
index a934508267..4415f96fae 100644
--- a/internal/db/sqltest/README.md
+++ b/internal/db/sqltest/README.md
@@ -3,7 +3,9 @@
 This test suite is used to test behavior of the database logic.
 In particular the data warehouse implementation is
 completely in sql via plpgsql, functions, and triggers.
-This test suite is also implemented directly in sql.
+Note that these tests are not limited to testing triggers - they should also be used to test constraints and indexes.
+
+This test suite is implemented directly in sql.
 
 ## Organization