How do I output the `micro` character python json.dumps

Question

I'm not sure about the specific terminology to my problem, so let me describe the exact problem itself:

test.csv:

foo,char
"bar","µ"

test.py:

#!/usr/bin/env python3

import csv
import json

with open('test.csv', mode='r') as file:
    reader = csv.DictReader(file)
    for row in reader:
        print(json.dumps(row))

Expected output:

{"foo": "bar", "char": "µ"}

Actual output:

{"foo": "bar", "char": "\u00b5"}

---

I've tried adding encoding='utf-8' to open() but it doesn't change the output.