Fix disfluencies in the sentence: The design was not tested but it proved to be reliable because over the years it does not have any major problems.
The design was not tested because it was not tested.
The design was tested because it was not tested.
The design is not tested because it was not tested.
The design is not tested because it is not tested.
The design is not tested because it is not tested.
The design is not tested because it is not tested.
The design is not tested because it is not tested.
The design is not tested because it is not tested.
The design is not tested
The design was not tested, but it proved to be reliable because over the years it has not had major problems.
The design was tested, but it proved to be unreliable because it was not able to withstand the test.
The design was tested, but it proved to be reliable because over the years it has been tested and proved to be reliable.
The design was tested, but it proved to be unreliable because over the years it has not been able to withstand the test.
The design