diff --git a/lib/ex_unit/lib/ex_unit/assertions.ex b/lib/ex_unit/lib/ex_unit/assertions.ex
index e1f64a99b28..2bad20c2039 100644
--- a/lib/ex_unit/lib/ex_unit/assertions.ex
+++ b/lib/ex_unit/lib/ex_unit/assertions.ex
@@ -614,7 +614,7 @@ defmodule ExUnit.Assertions do
   def __pins__(pins) do
     pins
     |> Enum.filter(fn {{_, ctx}, _} -> ctx == nil end)
-    |> Enum.reverse()
+    |> Enum.sort()
     |> Enum.map_join(@indent, fn {{name, _}, var} -> "#{name} = #{inspect(var)}" end)
     |> case do
       "" ->
diff --git a/lib/ex_unit/test/ex_unit/assertions_test.exs b/lib/ex_unit/test/ex_unit/assertions_test.exs
index 7254edd5e5a..9f213f9749b 100644
--- a/lib/ex_unit/test/ex_unit/assertions_test.exs
+++ b/lib/ex_unit/test/ex_unit/assertions_test.exs
@@ -524,8 +524,8 @@ defmodule ExUnit.AssertionsTest do
         """
         Assertion failed, no matching message after 0ms
         The following variables were pinned:
-          status = :valid
           other_status = :invalid
+          status = :valid
         Showing 1 of 1 message in the mailbox\
         """ = error.message