diff --git a/tests/testthat/test-views.R b/tests/testthat/test-views.R
index 13d68aa..0d5b526 100644
--- a/tests/testthat/test-views.R
+++ b/tests/testthat/test-views.R
@@ -72,6 +72,9 @@ test_that("gov_population_yearly exposes one row per (year, canonical_govid)", {
     expect_setequal(df$year, c(2019L, 2020L))
     expect_equal(nrow(df), 2L)
     expect_true(all(!is.na(df$population)))
+    # Hardcoded values are from the bundled fixture (regenerated 2026-04-29
+    # against cog_pipeline aad34c6 + bd3e744). Update if the fixture is
+    # rebuilt against a different source vintage.
     expect_equal(df$population[df$year == 2019L], 1935878L)
     expect_equal(df$population[df$year == 2020L], 1952778L)
     # Uniqueness on (year, canonical_govid) across the whole view.