Write a function `new_tuple(test_list, test_str)` that takes two arguments:
1. `test_list`: A list of strings.
2. `test_str`: A single string.
The function should return a new tuple that combines all elements of `test_list` followed by `test_str`.
#### Example Usage:
```python [main.nopy]
print(new_tuple(["WEB", "is"], "best")) # Output: ('WEB', 'is', 'best')
print(new_tuple(["We", "are"], "Developers")) # Output: ('We', 'are', 'Developers')
```
#### Constraints:
- The input list will only contain strings.
- The input string will be a single string.
- The function should return a tuple.