1 files changed, 15 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/marshal_test.rb b/activesupport/test/core_ext/marshal_test.rb
index a899f98705..7ac051b4b1 100644
--- a/activesupport/test/core_ext/marshal_test.rb
+++ b/activesupport/test/core_ext/marshal_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "active_support/core_ext/marshal"
 require "dependencies_test_helpers"
@@ -19,6 +21,19 @@ class MarshalTest < ActiveSupport::TestCase
     end
   end
 
+  test "that Marshal#load still works when passed a proc" do
+    example_string = "test"
+
+    example_proc = Proc.new do |o|
+      if o.is_a?(String)
+        o.capitalize!
+      end
+    end
+
+    dumped = Marshal.dump(example_string)
+    assert_equal Marshal.load(dumped, example_proc), "Test"
+  end
+
   test "that a missing class is autoloaded from string" do
     dumped = nil
     with_autoloading_fixtures do