diff --git a/modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml b/modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
index fa3e490a4b5..d2a9e5e92f9 100644
--- a/modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
@@ -580,6 +580,7 @@ paths:
       parameters:
         - name: enum_header_string_array
           in: header
+          explode: true
           description: Header parameter enum test (string array)
           schema:
             type: array