diff --git a/tests/testthat/test-marginaleffects.R b/tests/testthat/test-marginaleffects.R
index 2548a98c2..92305fdd6 100644
--- a/tests/testthat/test-marginaleffects.R
+++ b/tests/testthat/test-marginaleffects.R
@@ -62,7 +62,7 @@ test_that("comparisons()", {
       chains = 1
     )
   )
-  m <- marginaleffects::marginaleffects(
+  m <- marginaleffects::slopes(
     x,
     newdata = insight::get_datagrid(x, at = "Species"),
     variables = "Petal.Length"