diff --git a/schemas/latest/dbt_yml_files-latest.json b/schemas/latest/dbt_yml_files-latest.json
index 4c9cce3..8e9ec04 100644
--- a/schemas/latest/dbt_yml_files-latest.json
+++ b/schemas/latest/dbt_yml_files-latest.json
@@ -725,6 +725,11 @@
           "meta": {
             "type": "object"
           },
+          "relation": {
+            "description": "Required when defining your snapshot in YAML instead of using a legacy snapshot block.",
+            "type": "string",
+            "default": "source('', '')"
+          },
           "tests": {
             "type": "array",
             "items": {
diff --git a/tests/latest/valid/dbt_yml_files.yml b/tests/latest/valid/dbt_yml_files.yml
index 4072930..0afe22e 100644
--- a/tests/latest/valid/dbt_yml_files.yml
+++ b/tests/latest/valid/dbt_yml_files.yml
@@ -151,6 +151,14 @@ snapshots:
       - name: id 
         description: cool column, eh?
 
+  - name: yaml_defined_snapshot
+    relation: source('jaffle_shop', 'orders')
+    config:
+      schema: snapshots
+      database: analytics
+      unique_key: id
+      strategy: timestamp
+      updated_at: updated_at
 
 # model groups