A test has failed: who pays for the repeat?
Contractor side: Tests and inspections
Where the contract stands
It depends why it failed. If the result shows a Defect, the Contractor corrects it, the test is repeated and the Contractor pays the Client's assessed cost of the repeat (41.4 and 41.6 in NEC4, 40.4 and 40.6 in NEC3). If there is no Defect, the cost may come back as a compensation event.
Read the guide: A failed test: who pays
This is our plain-English summary, not legal advice. Your own contract, including any Z clauses, decides.
In Contract Status, step by step
Record the result
Tests and inspections have their own register. After the test, choose Notify the result: passed, failed or not completed. The figures and certificate go with it.

TI-0002: cube tests on storm tank 2, pour 2.
Follow the Defect
The side that notifies Defects uses Notify the Defect on the test, so the Defect is linked to it. You reply on the Defect in the usual way.

D-0002 came from the failed test.
Arrange the repeat
Once the Defect is corrected, Arrange the repeat raises a new test. When it passes, the failed test closes, and the assessed cost of the repeat is shown against it.

A failed test shows on the Action List as "Failed: arrange the repeat".
All screens are from the upgraded app, using a fictional water company, Kestrel Valley Water, and its made-up contractors.
What happens next on the other side
The Client side sees the result, the Supervisor notifies the Defect, and the Client side sees the repeat. A related records list on each record keeps all of it connected.
See it on a contract you can click through
The guided tour lets you walk the same fictional account yourself. Or book a demo, and bring the situation you are dealing with.