diff --git a/.eslintignore b/.eslintignore
index f5dda8b156..1bf59375c8 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -25,9 +25,6 @@ packages/core/src/utils/*.js
 packages/core/src/variables/*.js
 packages/core/test/unit/**/*.js
 
-# TODO: remove when migrated to TS
-!markdown-it-icons.test.js
-
 # Rules for pure JS files
 packages/core/src/lib/markdown-it/patches/*
 packages/core/src/lib/markdown-it/plugins/*
diff --git a/.gitignore b/.gitignore
index 407c29d93c..ff59cd5fff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,7 +90,4 @@ packages/core/src/utils/*.js
 packages/core/src/variables/*.js
 packages/core/test/unit/**/*.js
 
-# TODO: remove when migrated to TS
-!markdown-it-icons.test.js
-
 # --- packages/core end ---
diff --git a/packages/core/test/unit/markdown-it-icons.test.js b/packages/core/test/unit/markdown-it-icons.test.ts
similarity index 91%
rename from packages/core/test/unit/markdown-it-icons.test.js
rename to packages/core/test/unit/markdown-it-icons.test.ts
index 497879bd6d..2fbb64fa3e 100644
--- a/packages/core/test/unit/markdown-it-icons.test.js
+++ b/packages/core/test/unit/markdown-it-icons.test.ts
@@ -1,6 +1,7 @@
-const expectedOcticon = require('@primer/octicons')['git-pull-request'].toSVG();
+import octicons from '@primer/octicons';
+import markdownIt from '../../src/lib/markdown-it';
 
-const markdownIt = require('../../src/lib/markdown-it');
+const expectedOcticon = octicons['git-pull-request'].toSVG();
 
 test('markdown-it-icons renders icon syntax correctly', () => {
   const source = ':fab-font-awesome: :glyphicon-home: :octicon-git-pull-request: :mit-task-alt:';