diff --git a/macros/schema_tests/multi-column/expect_compound_columns_to_be_unique.sql b/macros/schema_tests/multi-column/expect_compound_columns_to_be_unique.sql
index 16c2ec1..fc83183 100644
--- a/macros/schema_tests/multi-column/expect_compound_columns_to_be_unique.sql
+++ b/macros/schema_tests/multi-column/expect_compound_columns_to_be_unique.sql
@@ -15,7 +15,7 @@
 {% elif quote_columns %}
     {%- set columns=[] %}
         {% for column in column_list -%}
-            {% set columns = columns.append( adapter.quote(column) ) %}
+            {% do columns.append( adapter.quote(column) ) %}
         {%- endfor %}
 {% else %}
     {{ exceptions.raise_compiler_error(
diff --git a/macros/schema_tests/multi-column/expect_select_column_values_to_be_unique_within_record.sql b/macros/schema_tests/multi-column/expect_select_column_values_to_be_unique_within_record.sql
index 5c9f97e..31e1dfc 100644
--- a/macros/schema_tests/multi-column/expect_select_column_values_to_be_unique_within_record.sql
+++ b/macros/schema_tests/multi-column/expect_select_column_values_to_be_unique_within_record.sql
@@ -19,7 +19,7 @@
 {% elif quote_columns %}
     {%- set columns=[] %}
         {% for column in column_list -%}
-            {% set columns = columns.append( adapter.quote(column) ) %}
+            {% do columns.append( adapter.quote(column) ) %}
         {%- endfor %}
 {% else %}
     {{ exceptions.raise_compiler_error(