diff --git a/e2e_test/batch/basic/dml.slt.part b/e2e_test/batch/basic/dml_basic.slt.part
similarity index 100%
rename from e2e_test/batch/basic/dml.slt.part
rename to e2e_test/batch/basic/dml_basic.slt.part
diff --git a/e2e_test/batch/basic/dml_update.slt.part b/e2e_test/batch/basic/dml_update.slt.part
index cff0f23955b7d..580a74ba44368 100644
--- a/e2e_test/batch/basic/dml_update.slt.part
+++ b/e2e_test/batch/basic/dml_update.slt.part
@@ -1,4 +1,4 @@
-# Extension to `dml.slt.part` for testing advanced `UPDATE` statements.
+# Extension to `dml_basic.slt.part` for testing advanced `UPDATE` statements.
 
 statement ok
 SET RW_IMPLICIT_FLUSH TO true;
@@ -103,6 +103,10 @@ update t set (v1, v2) = (select '888.88', 999);
 statement error number of columns does not match number of values
 update t set (v1, v2) = (select 666);
 
+# Multiple assignments, to scalar expression.
+statement error source for a multiple-column UPDATE item must be a sub-SELECT or ROW\(\) expression
+update t set (v1, v2) = v1 + 1;
+
 
 statement ok
 drop table t;