sendRequest does not seem to use Headers values I specify in the Test - postman

Question

I'm using sendRequest function to send a 2nd request as part of the Test for my 1st request. But it seems that sendRequest does not use the Headers I specify in the function. Any ideas why and how to fix it?
Here is part of my Test, that sends 2nd request:
var runHost = pm.environment.get("MyHost");
var runToken = pm.environment.get("Token");
pm.sendRequest({
url: runHost,
method: 'PUT',
headers: {
"Authorization": "Auth "+runToken,
"Accept": "application/json",
"Content-Type": "application/json"
},
body: {
mode: 'raw',
raw: JSON.stringify(jsonData)
}
}, (err, res) => {
console.log(res);
});
Here is what I see as an actual Request Headers sent (what I see in Console):
PUT https://some_url
Request Headers:
Content-Type:"text/plain"
User-Agent:"PostmanRuntime/7.15.2"
Accept:"*/*"
Cache-Control:"no-cache"
Postman-Token:"5e3543c-1ww0-dfc4-bert-92ba9a455667"
Host:"my_host"
Accept-Encoding:"gzip, deflate"
Content-Length:1876
Connection:"keep-alive"
I expect Request Headers to have the following attributes and values:
Authorization:"Auth current_token_value"
Accept:"application/json"
Content-Type:"application/json"
...

Answer 1

The key for the object that contains the Request Headers should be header, like in the example below:
pm.sendRequest({
url: runHost,
method: 'PUT',
*header*: {
"Authorization": "Auth "+runToken,
"Accept": "application/json",
"Content-Type": "application/json"
},
body: {
mode: 'raw',
raw: JSON.stringify(jsonData)
}
}, (err, res) => {
console.log(res);
});