England Lions coach Andy Flower says his players have a challenge on their hands to bridge the gap from first-class to Test cricket after being whitewashed 3-0 by West Indies A.
Slow left-armer Jomel Warrican finished with 30 wickets in the spin-dominated series, condemning the English second string to three comprehensive defeats.
Off-spinner Rahkeem Cornwall chipped in with 19 victims, highlighting the tourists' repeated failings.
"We want to see what the players are made of and how good they are under pressure. This was strong opposition with 92 Test caps in their squad compared to 14 in ours. It's exactly the type of challenge we want to put in front of our youngsters," Flower said.
"In that sense the tour has allowed us to learn a great deal about the players but the results are obviously extremely disappointing.
"We have come up against two spinners who have offered challenges in difficult conditions and the disappointing thing is that the batting line-up haven't learnt how to deal with those conditions across the course of the series.
"They have shown glimpses of improvement and Haseeb Hameed showed the sort of form that we know he is capable of, but again, nobody went on and made that match-winning contribution. This series has given us the opportunity to really learn about these batsmen in alien conditions."
Meanwhile, England are 8/11 to win the third ODI against New Zealand, who are 11/10 to win the match.
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