diff --git a/tests/testthat/test-highlevel64.R b/tests/testthat/test-highlevel64.R
new file mode 100644
index 0000000..286e971
--- /dev/null
+++ b/tests/testthat/test-highlevel64.R
@@ -0,0 +1,13 @@
+test_that("match basics work", {
+  x = as.integer64(2:5)
+  y = as.integer64(3:6)
+  expect_identical(match(x, y), c(NA, 1:3))
+  expect_identical(match(y, x), c(2:4, NA))
+
+  expect_identical(match(2:5, y), c(NA, 1:3))
+  expect_identical(match(as.numeric(2:5), y), c(NA, 1:3))
+  expect_identical(match(y, 2:5), c(2:4, NA))
+  expect_identical(match(y, as.numeric(2:5)), c(2:4, NA))
+
+  expect_identical(match(x, y, nomatch=0L), 0:3)
+})