diff --git a/assets/src/admin/index.js b/assets/src/admin/index.js
index cf20a2dd..df2c4cdf 100644
--- a/assets/src/admin/index.js
+++ b/assets/src/admin/index.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 /**
  * Internal dependencies
  */
diff --git a/assets/src/polyfills/wp-i18n.js b/assets/src/polyfills/wp-i18n.js
index f429df80..7d9bedc7 100644
--- a/assets/src/polyfills/wp-i18n.js
+++ b/assets/src/polyfills/wp-i18n.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 /**
  * WordPress dependencies
  */
diff --git a/assets/src/polyfills/wp-polyfill.js b/assets/src/polyfills/wp-polyfill.js
index fbac6e1c..cd45aa44 100644
--- a/assets/src/polyfills/wp-polyfill.js
+++ b/assets/src/polyfills/wp-polyfill.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 /**
  * External dependencies
  */
diff --git a/assets/src/polyfills/wp-url.js b/assets/src/polyfills/wp-url.js
index 655e5d31..da7158c9 100644
--- a/assets/src/polyfills/wp-url.js
+++ b/assets/src/polyfills/wp-url.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 /**
  * WordPress dependencies
  */