--- a/testing/mozharness/configs/unittests/linux_unittest.py
+++ b/testing/mozharness/configs/unittests/linux_unittest.py
@@ -306,17 +306,16 @@ config = {
     ],
     "vcs_output_timeout": 1000,
     "minidump_save_path": "%(abs_work_dir)s/../minidumps",
     "buildbot_max_log_size": 52428800,
     "default_blob_upload_servers": [
         "https://blobupload.elasticbeanstalk.com",
     ],
     "unstructured_flavors": {"mochitest": ['jetpack'],
-                            "xpcshell": [],
                             "gtest": [],
                             "mozmill": [],
                             "cppunittest": [],
                             "jittest": [],
                             "mozbase": [],
                             },
     "blob_uploader_auth_file": os.path.join(os.getcwd(), "oauth.txt"),
     "download_minidump_stackwalk": True,

--- a/testing/mozharness/configs/unittests/mac_unittest.py
+++ b/testing/mozharness/configs/unittests/mac_unittest.py
@@ -250,17 +250,16 @@ config = {
     ],
     "vcs_output_timeout": 1000,
     "minidump_save_path": "%(abs_work_dir)s/../minidumps",
     "buildbot_max_log_size": 52428800,
     "default_blob_upload_servers": [
         "https://blobupload.elasticbeanstalk.com",
     ],
     "unstructured_flavors": {"mochitest": ['jetpack'],
-                            "xpcshell": [],
                             "gtest": [],
                             "mozmill": [],
                             "cppunittest": [],
                             "jittest": [],
                             "mozbase": [],
                             },
     "blob_uploader_auth_file": os.path.join(os.getcwd(), "oauth.txt"),
     "download_minidump_stackwalk": True,

--- a/testing/mozharness/configs/unittests/win_unittest.py
+++ b/testing/mozharness/configs/unittests/win_unittest.py
@@ -270,17 +270,16 @@ config = {
     ],
     "vcs_output_timeout": 1000,
     "minidump_save_path": "%(abs_work_dir)s/../minidumps",
     "buildbot_max_log_size": 52428800,
     "default_blob_upload_servers": [
         "https://blobupload.elasticbeanstalk.com",
     ],
     "unstructured_flavors": {"mochitest": ['jetpack'],
-                            "xpcshell": [],
                             "gtest": [],
                             "mozmill": [],
                             "cppunittest": [],
                             "jittest": [],
                             "mozbase": [],
                             },
     "blob_uploader_auth_file": os.path.join(os.getcwd(), "oauth.txt"),
     "download_minidump_stackwalk": True,