diff --git a/flatten/testdata/circular1.yaml b/flatten/testdata/circular1.yaml
deleted file mode 100644
index 071ac8a3..00000000
--- a/flatten/testdata/circular1.yaml
+++ /dev/null
@@ -1,62 +0,0 @@
-openapi: 3.0.0
-info:
-  title: Circular Reference Example
-  version: 1.0.0
-paths:
-  /endpoint:
-    get:
-      summary: Example endpoint
-      responses:
-        '200':
-          description: OK
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Circular_1'
-
-components:
-  schemas:
-    Circular_1:
-      type: object
-      allOf:
-        - $ref: '#/components/schemas/Circular_1'         
-      required:
-      - name
-      description: simple circular allof
-
-    Circular_2:
-      type: object
-      allOf:
-        - $ref: '#/components/schemas/Circular_2'
-        - type: object
-          properties:
-            test:
-              $ref: '#/components/schemas/Circular_2'   
-    
-    Circular_3:
-      type: object
-      properties:
-        test:
-          type: object
-          allOf:
-            - $ref: '#/components/schemas/Circular_3'
-
-    Circular_4:
-      type: object
-      allOf:
-        - $ref: '#/components/schemas/Circular_4'
-        - type: object
-          properties:
-            test:
-              type: object
-              allOf:
-                - type: object
-                  properties:
-                    a:
-                      type: object
-                  description: a
-                - type: object
-                  properties:
-                    b:
-                      $ref: '#/components/schemas/Circular_4'
-                  description: b