Can my testing error be lower than validation error but higher than training error?

I am trying a multilayer perceptron with 5 hidden nodes. However the testing error is lower than the validation error and higher than the training error. The coefficient of correlation on the test set is also higher than that on the validation set. Is that acceptable? I've included the regression and performance plots.The generalization is okay according to me; not the best but adequate.

Thank you in advance!