3 files changed, 9 insertions, 14 deletions
diff --git a/activesupport/lib/active_support/testing/autorun.rb b/activesupport/lib/active_support/testing/autorun.rb
index c446adc16d..5aa5f46310 100644
--- a/activesupport/lib/active_support/testing/autorun.rb
+++ b/activesupport/lib/active_support/testing/autorun.rb
@@ -1,5 +1,5 @@
 gem 'minitest'
 
-require 'minitest/unit'
+require 'minitest'
 
-MiniTest::Unit.autorun
+Minitest.autorun
diff --git a/activesupport/lib/active_support/testing/isolation.rb b/activesupport/lib/active_support/testing/isolation.rb
index e16b73a036..9c52ae7768 100644
--- a/activesupport/lib/active_support/testing/isolation.rb
+++ b/activesupport/lib/active_support/testing/isolation.rb
@@ -72,16 +72,12 @@ module ActiveSupport
         end
       end
 
-      def run(runner)
-        _run_class_setup
-
-        serialized = run_in_isolation do |isolated_runner|
-          super(isolated_runner)
+      def run
+        serialized = run_in_isolation do
+          super
         end
 
-        retval, proxy = Marshal.load(serialized)
-        proxy.__replay__(runner)
-        retval
+        Marshal.load(serialized)
       end
 
       module Forking
@@ -90,9 +86,8 @@ module ActiveSupport
 
           pid = fork do
             read.close
-            proxy = ProxyTestResult.new
-            retval = yield proxy
-            write.puts [Marshal.dump([retval, proxy])].pack("m")
+            yield
+            write.puts [Marshal.dump(self.dup)].pack("m")
             exit!
           end
 
diff --git a/activesupport/lib/active_support/testing/tagged_logging.rb b/activesupport/lib/active_support/testing/tagged_logging.rb
index 9d43eb179f..f4cee64091 100644
--- a/activesupport/lib/active_support/testing/tagged_logging.rb
+++ b/activesupport/lib/active_support/testing/tagged_logging.rb
@@ -7,7 +7,7 @@ module ActiveSupport
 
       def before_setup
         if tagged_logger
-          heading = "#{self.class}: #{__name__}"
+          heading = "#{self.class}: #{name}"
           divider = '-' * heading.size
           tagged_logger.info divider
           tagged_logger.info heading