diff --git a/prettier.config.d.ts b/prettier.config.d.ts
index 748dcdc..1792f9c 100644
--- a/prettier.config.d.ts
+++ b/prettier.config.d.ts
@@ -1,4 +1,4 @@
 import prettier from 'prettier'
 
-declare const options: prettier.Options
-export default options
+declare const config: prettier.Config
+export default config
diff --git a/prettier.config.js b/prettier.config.js
index 63af10f..4204ae0 100644
--- a/prettier.config.js
+++ b/prettier.config.js
@@ -16,4 +16,10 @@ module.exports = {
   arrowParens: 'always',
   proseWrap: 'always',
   endOfLine: 'lf',
+
+  overrides: [
+    // Disable formatting JSONC with trailing commas (discouraged by the format)
+    // See https://github.com/prettier/prettier/issues/15956#issuecomment-1987146114
+    { files: ['*.jsonc'], options: { trailingComma: 'none' } },
+  ],
 }
diff --git a/tests/basicFile.ts b/tests/basicFile.ts
new file mode 100644
index 0000000..6febc6a
--- /dev/null
+++ b/tests/basicFile.ts
@@ -0,0 +1,5 @@
+interface Foo {
+  bar: number
+}
+
+export const foo: Foo = { bar: 1 }
diff --git a/tests/reactFile.tsx b/tests/reactFile.tsx
new file mode 100644
index 0000000..eb7e94d
--- /dev/null
+++ b/tests/reactFile.tsx
@@ -0,0 +1,6 @@
+import React from 'react'
+
+// This is a Button component
+export const Button = () => {
+  return <div>Foo Bar</div>
+}
diff --git a/tests/tokenFile.jsonc b/tests/tokenFile.jsonc
new file mode 100644
index 0000000..81f50a3
--- /dev/null
+++ b/tests/tokenFile.jsonc
@@ -0,0 +1,4 @@
+{
+  // This is foo.
+  "foo": "bar"
+}