diff --git a/tests/testthat/test-diff-rad.R b/tests/testthat/test-diff-rad.R
index ddcd4aa1..6ff12d62 100644
--- a/tests/testthat/test-diff-rad.R
+++ b/tests/testthat/test-diff-rad.R
@@ -8,25 +8,25 @@ pt_02 <- as_units(0.2, 'rad')
 pi_rad <- as_units(pi, 'rad')
 
 # Adapted from: https://gist.github.com/bradphelan/7fe21ad8ebfcb43696b8
-expect_equal(diff_rad(pt_01, pt_02, TRUE), pt_01)
-expect_equal(diff_rad(pt_01, pt_02 + 2 * pi_rad, TRUE), pt_01)
-expect_equal(diff_rad(pt_01, pt_02 - 2 * pi_rad, TRUE), pt_01)
-expect_equal(diff_rad(pt_01 + 2 * pi_rad, pt_02, TRUE), pt_01)
-expect_equal(diff_rad(pt_01 - 2 * pi_rad, pt_02, TRUE), pt_01)
-expect_equal(diff_rad(pt_02, pt_01, TRUE), -pt_01)
-expect_equal(diff_rad(pt_02 + 2 * pi_rad, pt_01, TRUE), -pt_01)
-expect_equal(diff_rad(pt_02 - 2 * pi_rad, pt_01, TRUE), -pt_01)
-expect_equal(diff_rad(pt_02, pt_01 + 2 * pi_rad, TRUE), -pt_01)
-expect_equal(diff_rad(pt_02, pt_01 - 2 * pi_rad, TRUE), -pt_01)
+expect_equal(diff_rad(pt_01, pt_02, TRUE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01, pt_02 + 2 * pi_rad, TRUE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01, pt_02 - 2 * pi_rad, TRUE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01 + 2 * pi_rad, pt_02, TRUE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01 - 2 * pi_rad, pt_02, TRUE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02, pt_01, TRUE, TRUE), -pt_01)
+expect_equal(diff_rad(pt_02 + 2 * pi_rad, pt_01, TRUE, TRUE), -pt_01)
+expect_equal(diff_rad(pt_02 - 2 * pi_rad, pt_01, TRUE, TRUE), -pt_01)
+expect_equal(diff_rad(pt_02, pt_01 + 2 * pi_rad, TRUE, TRUE), -pt_01)
+expect_equal(diff_rad(pt_02, pt_01 - 2 * pi_rad, TRUE, TRUE), -pt_01)
 
-expect_equal(diff_rad(pt_01, pt_02, FALSE), pt_01)
-expect_equal(diff_rad(pt_01, pt_02 + 2 * pi_rad, FALSE), pt_01)
-expect_equal(diff_rad(pt_01, pt_02 - 2 * pi_rad, FALSE), pt_01)
-expect_equal(diff_rad(pt_01 + 2 * pi_rad, pt_02, FALSE), pt_01)
-expect_equal(diff_rad(pt_01 - 2 * pi_rad, pt_02, FALSE), pt_01)
-expect_equal(diff_rad(pt_02, pt_01, FALSE), pt_01)
-expect_equal(diff_rad(pt_02 + 2 * pi_rad, pt_01, FALSE), pt_01)
-expect_equal(diff_rad(pt_02 - 2 * pi_rad, pt_01, FALSE), pt_01)
-expect_equal(diff_rad(pt_02, pt_01 + 2 * pi_rad, FALSE), pt_01)
-expect_equal(diff_rad(pt_02, pt_01 - 2 * pi_rad, FALSE), pt_01)
+expect_equal(diff_rad(pt_01, pt_02, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01, pt_02 + 2 * pi_rad, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01, pt_02 - 2 * pi_rad, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01 + 2 * pi_rad, pt_02, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_01 - 2 * pi_rad, pt_02, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02, pt_01, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02 + 2 * pi_rad, pt_01, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02 - 2 * pi_rad, pt_01, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02, pt_01 + 2 * pi_rad, FALSE, TRUE), pt_01)
+expect_equal(diff_rad(pt_02, pt_01 - 2 * pi_rad, FALSE, TRUE), pt_01)