diff --git a/actionpack/lib/action_controller/dispatcher.rb b/actionpack/lib/action_controller/dispatcher.rb
index bdae5f9d869ba6d42e6d97fb566d9024c4cce509..106d9605af98cc82dc7072f879cdcb76b322d6c1 100644
--- a/actionpack/lib/action_controller/dispatcher.rb
+++ b/actionpack/lib/action_controller/dispatcher.rb
@@ -20,6 +20,7 @@ def define_dispatcher_callbacks(cache_classes)
         end
 
         if defined?(ActiveRecord)
+          after_dispatch :checkin_connections
           before_dispatch { ActiveRecord::Base.verify_active_connections! }
           to_prepare(:activerecord_instantiate_observers) { ActiveRecord::Base.instantiate_observers }
         end
@@ -145,6 +146,21 @@ def flush_logger
       Base.logger.flush
     end
 
+    def mark_as_test_request!
+      @test_request = true
+      self
+    end
+
+    def test_request?
+      @test_request
+    end
+
+    def checkin_connections
+      # Don't return connection (and peform implicit rollback) if this request is a part of integration test
+      return if test_request?
+      ActiveRecord::Base.clear_active_connections!
+    end
+
     protected
       def handle_request
         @controller = Routing::Routes.recognize(@request)
diff --git a/actionpack/lib/action_controller/integration.rb b/actionpack/lib/action_controller/integration.rb
index a98c1af7f900a48e8921af14a84c2f37c8c22656..fc473c269c5a25a2c1d3c7bb9d1bc35b066510d3 100644
--- a/actionpack/lib/action_controller/integration.rb
+++ b/actionpack/lib/action_controller/integration.rb
@@ -276,7 +276,7 @@ def process(method, path, parameters = nil, headers = nil)
           ActionController::Base.clear_last_instantiation!
 
           env['rack.input'] = data.is_a?(IO) ? data : StringIO.new(data || '')
-          @status, @headers, result_body = ActionController::Dispatcher.new.call(env)
+          @status, @headers, result_body = ActionController::Dispatcher.new.mark_as_test_request!.call(env)
           @request_count += 1
 
           @controller = ActionController::Base.last_instantiation