diff --git a/doc/scripts/header.js b/doc/scripts/header.js
index <HASH>..<HASH> 100644
--- a/doc/scripts/header.js
+++ b/doc/scripts/header.js
@@ -17,7 +17,7 @@ domReady(() => {
 	header.insertBefore(projectname, header.firstChild);
 
 	const testlink = document.querySelector('header > a[data-ice="testLink"]');
-	testlink.href = 'https://coveralls.io/github/failure-abstraction/error';
+	testlink.href = 'https://app.codecov.io/gh/failure-abstraction/error';
 	testlink.target = '_BLANK';
 
 	const searchBox = document.querySelector('.search-box');
:robot: docs: Use codecov as test link.

These changes were automatically generated by a transform whose code can be found at:
  - <URL>