Testing module not accessing gateway variables

[asos-davidstafford]

It appears that the test cannot access the variable defined in the gateway. I have followed the jinja documentation define here
testing, however the SCHEMA name in this case is ignored.

MODEL (
  name @SILVER_SCHEMA.mytable,
  kind FULL,
  cron '@daily',
....
....
)

SELECT * FROM `@EXTERNAL_CATALOG.bronze.sourcetable

test:
  description: "Test"
  model: {{ var('SILVER_SCHEMA') }}.mytable
  inputs: 
    mysourcedb.bronze.sourcetable:

When trying to run the test i get

[WARNING] Model '"sandbox_dev"."none"."mytable"' was not found at 
C:\git\POVs\sqlmesh-pov\technology\tests\test_ref_country_region_v2.yaml

If this should be supported by inputs, then this is also broken in the same way