--- a/taskcluster/taskgraph/transforms/tests.py
+++ b/taskcluster/taskgraph/transforms/tests.py
@@ -161,17 +161,17 @@ test_description_schema = Schema({
         'buildbot-bridge',
     ),
 
     # For tasks that will run in docker-worker or docker-engine, this is the
     # name of the docker image or in-tree docker image to run the task in.  If
     # in-tree, then a dependency will be created automatically.  This is
     # generally `desktop-test`, or an image that acts an awful lot like it.
     Required('docker-image', default={'in-tree': 'desktop-test'}): optionally_keyed_by(
-        'test-platform', 'test-platform-phylum',
+        'test-platform',
         Any(
             # a raw Docker image path (repo/image:tag)
             basestring,
             # an in-tree generated docker image (from `taskcluster/docker/<name>`)
             {'in-tree': basestring}
         )
     ),
 
@@ -188,17 +188,17 @@ test_description_schema = Schema({
     Required('checkout', default=False): bool,
 
     # Wheter to perform a machine reboot after test is done
     Optional('reboot', default=False):
         Any(False, 'always', 'on-exception', 'on-failure'),
 
     # What to run
     Required('mozharness'): optionally_keyed_by(
-        'test-platform', 'test-platform-phylum', {
+        'test-platform', {
             # the mozharness script used to run this task
             Required('script'): basestring,
 
             # the config files required for the task
             Required('config'): optionally_keyed_by(
                 'test-platform',
                 [basestring]),