def METHOD_NAME(test_data, tfidf_vectorizer):
    X_test, y_test = test_data
    # Use the fitted tokenizer to transform the test dataset
    transformed_X_test = tfidf_vectorizer.transform(X_test)
    transformed_y_test = np.array(y_test)
    y_test = y_test.fillna(0)
    transformed_y_test = np.array(y_test)
    return transformed_X_test, transformed_y_test