How to get a validation set for a class definition?

Question

Python

Good evening.

Please tell me how you usually get a test set for classification, if this is a learning task.
I have a dataset with values ​​and a class.
The code I'm trying to learn the model from uses two sets. One is divided into training and validation (X_train, x_valid, y_train, y_valid). And the second one is loaded as a test one - without class values ​​(X_test, y_test).

I don’t understand how I can form a set similar to the test one in order to check the model according to my data.

Thank you!