--- a/mail/test/mozmill/composition/test-drafts.js
+++ b/mail/test/mozmill/composition/test-drafts.js
@@ -227,17 +227,17 @@ function test_content_language_header() 
 
   // Clean up the created draft.
   press_delete(mc);
 }
 
 /**
  * Tests space stuffing of plaintext message.
  */
-function disabled_test_remove_space_stuffing_format_flowed() {
+function test_remove_space_stuffing_format_flowed() {
   // Prepare for plaintext email.
   let oldHtmlPref = Services.prefs.getBoolPref("mail.identity.default.compose_html");
   Services.prefs.setBoolPref("mail.identity.default.compose_html", false);
 
   let cwc = open_compose_new_mail();
 
   setup_msg_contents(cwc, "test@example.invalid",
                      "Testing space stuffing in plain text email",