--- a/testing/mozharness/configs/unittests/win_taskcluster_unittest.py
+++ b/testing/mozharness/configs/unittests/win_taskcluster_unittest.py
@@ -224,17 +224,18 @@ config = {
     },
     "all_cppunittest_suites": {
         "cppunittest": ['tests/cppunittest']
     },
     "all_gtest_suites": {
         "gtest": []
     },
     "all_jittest_suites": {
-        "jittest": []
+        "jittest": [],
+        "jittest-chunked": [],
     },
     "all_mozbase_suites": {
         "mozbase": []
     },
     "run_cmd_checks_enabled": True,
     "preflight_run_cmd_suites": [
         {
             'name': 'disable_screen_saver',