diff --git a/Gemfile.lock b/Gemfile.lock
index c4d892522e..581d1b8f9d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -320,7 +320,7 @@ GEM
     mini_magick (4.10.1)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.13.0)
+    minitest (5.14.0)
     minitest-bisect (1.5.1)
       minitest-server (~> 1.0)
       path_expander (~> 1.1)
diff --git a/activesupport/lib/active_support/testing/parallelization.rb b/activesupport/lib/active_support/testing/parallelization.rb
index 96518a4a58..48bc3abb7d 100644
--- a/activesupport/lib/active_support/testing/parallelization.rb
+++ b/activesupport/lib/active_support/testing/parallelization.rb
@@ -102,7 +102,7 @@ module ActiveSupport
                 queue.record(reporter, result)
               rescue DRb::DRbConnError
                 result.failures.each do |failure|
-                  failure.exception = DRb::DRbRemoteError.new(failure.exception)
+                  failure.send(:initialize, DRb::DRbRemoteError.new(failure.exception))
                 end
                 queue.record(reporter, result)
               end