diff --git a/.github/workflows/acceptance-test.yml b/.github/workflows/acceptance-test.yml
index 9eafb58..b02e9bb 100644
--- a/.github/workflows/acceptance-test.yml
+++ b/.github/workflows/acceptance-test.yml
@@ -57,3 +57,12 @@ jobs:
             lowercase_alphanumeric=^[a-z0-9]*$
           files: |
             __tests__/fixtures/json/custom_ajv_regexp_format/valid.json
+
+      - name: acceptance test - flat yaml
+        uses: ./
+        id: json-yaml-validate-flat-yaml-test
+        with:
+          comment: "true"
+          yaml_schema: ./__tests__/fixtures/schemas/flat.yaml
+          files: |
+            __tests__/acceptance/flat_yaml/flat.yaml
diff --git a/__tests__/acceptance/flat_yaml/flat.yaml b/__tests__/acceptance/flat_yaml/flat.yaml
new file mode 100644
index 0000000..797b2c1
--- /dev/null
+++ b/__tests__/acceptance/flat_yaml/flat.yaml
@@ -0,0 +1,3 @@
+name: Test
+author: Me
+category: YAML
diff --git a/__tests__/fixtures/schemas/flat.yaml b/__tests__/fixtures/schemas/flat.yaml
new file mode 100644
index 0000000..4286d7f
--- /dev/null
+++ b/__tests__/fixtures/schemas/flat.yaml
@@ -0,0 +1,12 @@
+name:
+  type: string
+  description: The name
+  required: true
+author:
+  type: string
+  description: The author
+  required: true
+category:
+  type: string
+  description: The category
+  required: true