diff --git a/lineal-viz/src/utils/css-four-prop-parse.ts b/lineal-viz/src/utils/css-four-prop-parse.ts
index ebd6bfd..c9aedd7 100644
--- a/lineal-viz/src/utils/css-four-prop-parse.ts
+++ b/lineal-viz/src/utils/css-four-prop-parse.ts
@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 export type FourProp = {
   top: number;
   right: number;
diff --git a/test-app/.stylelintrc.js b/test-app/.stylelintrc.js
index 1a36f35..396608e 100644
--- a/test-app/.stylelintrc.js
+++ b/test-app/.stylelintrc.js
@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 'use strict';
 
 module.exports = {
diff --git a/test-app/tests/helpers/index.js b/test-app/tests/helpers/index.js
index 7f70de8..a223051 100644
--- a/test-app/tests/helpers/index.js
+++ b/test-app/tests/helpers/index.js
@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 import {
   setupApplicationTest as upstreamSetupApplicationTest,
   setupRenderingTest as upstreamSetupRenderingTest,