--- a/taskcluster/ci/test/tests.yml
+++ b/taskcluster/ci/test/tests.yml
@@ -76,17 +76,16 @@ crashtest:
             default: built-projects
     chunks:
         by-test-platform:
             android-4.3-arm7-api-15/debug: 10
             android.*: 4
             default: 1
     e10s:
         by-test-platform:
-            windows.*: false # Bug 1304435
             macosx64/debug: true
             default: both
     mozharness:
         by-test-platform:
             android.*:
                 script: android_emulator_unittest.py
                 no-read-buildbot-config: true
                 config: