substitutions:
  var1: '1'
  var2: '2'
  a: alpha
test_list:
  - values:
      - var1: '1'
      - a: A
      - b: B-default
      - c: The value of C is C
  - values:
      - var1: '1'
      - a: alpha
      - b: beta
      - c: The value of C is $c