Great Britain's women drew 1-1 with Spain in the second test in Valencia so cannot now lose the three-match series.
GB captain Alex Danson opened the scoring in the fourth minute, but Spain's Lola Riera Zuzuarregui brought the hosts level just before half-time with a penalty stroke.
The visitors had the better chances in the third and fourth quarters, but Spain held on for a draw.
Great Britain won the first match 1-0 and complete the series on Friday.
The matches are part of the team's preparation for June's Hockey World League semi-final, where Olympic qualification is on offer.