[Python] FastAPI POST Pydantic method unit testing redirecting status_code 307 instead of 200...

I have a test case where I am testing a POST service using pytest hosted with FastAPI Uvicorn. However the response is getting responded with status code 307. But this doesn't happen on actual webservice is tested through a browser or curl. What is happening here?

from fastapi.testclient import TestClient
from src.main import app
import json

client = TestClient(app)

def test_get_confidence_ws():
data = {
"acc_id": 1234567801,
"remoteIp": "127.255.255.255",
"userAgent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0"
}
response = client.post("/confidence", json=json.dumps(data))
assert response.status_code == 200


Test response

> assert response.status_code == 200
E assert 307 == 200
E + where 307 = <Response [307]>.status_code


EDIT:

Actual endpoint that is tested:

@app.post("/confidence/")
def get_confidence(json: LoginClassifierSchema):
...
response = {
"key" : "value"
}
return response

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