Improved support for custom configs in data tests

website/docs/reference/data-test-configs.md

@@ -275,3 +275,23 @@ tests:
 ```
 
 </File>
+
+#### Specify custom configurations for generic data tests
+
+_Currently available in dbt Cloud only. The `custom_config` key will become available in dbt Core later this year._
+
+Use the `custom_config` key to specify custom configurations for data tests. For example, the following specifies custom Snowflake configurations that dbt should use when executing the `unique` data test:
+
+
+```yml
+
+models:
+  - name: my_model
+    columns:
+      - name: id
+        tests:
+          - unique:
+          - config:
+             custom_config: snowflake_warehouse
+
+```