--- test/test_download.rb	2018-01-22 02:08:00.000013728 +0100
+++ test/test_download.rb.1	2018-01-22 02:11:49.820014276 +0100
@@ -70,12 +70,12 @@
     end
 
     error = nil
-    assert_scripted do
-      begin
-        scp.download!("/path/to/remote.txt")
-      rescue
-        error = $!
-      end
+    Net::SSH::Test::Extensions::IO.with_test_extension do
+    begin
+      scp.download!("/path/to/remote.txt")
+    rescue
+      error = $!
+    end
     end
     assert_equal Net::SCP::Error, error.class
     assert_equal "SCP did not finish successfully (1): File not found: /path/to/remote.txt\n", error.message