diff --git a/tests/testthat/test-extra-time.R b/tests/testthat/test-extra-time.R
index e3994e150..35d77c01e 100644
--- a/tests/testthat/test-extra-time.R
+++ b/tests/testthat/test-extra-time.R
@@ -47,7 +47,6 @@ test_that("extra_time, newdata, get_index() work", {
     family = tweedie(link = "log"),
     time = "year",
     spatial = "off",
-    # mesh = make_mesh(pcod, c("X", "Y"), n_knots = 25),
     spatiotemporal = "off",
     extra_time = c(2006, 2008, 2010, 2012, 2014, 2016, 2018) # last real year is 2017
   )
@@ -82,4 +81,11 @@ test_that("extra_time, newdata, get_index() work", {
 
   p$fake_nd <- NULL # mimic old sdmTMB
   expect_error(ind4 <- get_index(p))
+
+  # missing some original time:
+  nd <- replicate_df(pcod, "year", unique(pcod$year))
+  nd <- subset(nd, year != 2017)
+  p <- predict(m, newdata = nd, return_tmb_object = TRUE)
+  ind5 <- get_index(p)
+  expect_equal(ind2[ind2$year %in% nd$year, "est"], ind5[ind5$year %in% nd$year, "est"])
 })