--- a/toolkit/components/extensions/test/mochitest/chrome.ini
+++ b/toolkit/components/extensions/test/mochitest/chrome.ini
@@ -3,12 +3,11 @@ skip-if = os == 'android'
 support-files =
   file_download.html
   file_download.txt
   interruptible.sjs
   file_sample.html
 
 [test_chrome_ext_downloads_download.html]
 [test_chrome_ext_downloads_misc.html]
-skip-if = 1 # Currently causes too many intermittent failures.
 [test_chrome_ext_downloads_search.html]
 [test_chrome_ext_eventpage_warning.html]
 [test_chrome_ext_contentscript_unrecognizedprop_warning.html]

--- a/toolkit/components/extensions/test/mochitest/test_chrome_ext_downloads_misc.html
+++ b/toolkit/components/extensions/test/mochitest/test_chrome_ext_downloads_misc.html
@@ -602,16 +602,25 @@ add_task(function* test_removal_of_incom
           previous: false,
           current: true,
         },
         canResume: {
           previous: false,
           current: true,
         },
       },
+    }, {
+      type: "onChanged",
+      data: {
+        id,
+        error: {
+          previous: null,
+          current: "USER_CANCELED",
+        },
+      },
     }]);
   is(msg.status, "success", "got onChanged event corresponding to pause");
 
   msg = yield runInExtension("removeFile", id);
   is(msg.status, "error", "removeFile() on paused download failed");
 
   ok(/Cannot remove incomplete download/.test(msg.errmsg), "removeFile() failed due to download being incomplete");