diff --git a/src/initialize-test-window.coffee b/src/initialize-test-window.coffee
index 672923526..3e62cfbc9 100644
--- a/src/initialize-test-window.coffee
+++ b/src/initialize-test-window.coffee
@@ -61,8 +61,8 @@ module.exports = ({blobStore}) ->
 
       # Copy: cmd-c / ctrl-c
       if (event.metaKey or event.ctrlKey) and event.keyCode is 67
-        ipcHelpers.call('window-method', 'copy')
-
+        atom.clipboard.write(window.getSelection().toString())
+        
     window.addEventListener('keydown', handleKeydown, true)
 
     # Add 'exports' to module search path.