Test Runner Not Detecting Equal Concept Values

When running the test CqlTypeOperatorsTest:ToConcept:CodeToConcept1, the test runner reports:

Test CqlTypeOperatorsTest:ToConcept:CodeToConcept1 status: fail expected: Concept {
                                        codes: Code { code: '8480-6' }
                                } actual: { codes: [Array], display: undefined }

My engine is returning the following result:

{
  "resourceType": "Parameters",
  "parameters": [
    {
      "extension": [
        {
          "url": "http://hl7.org/fhir/StructureDefinition/cqf-cqlType",
          "valueString": "System.Concept"
        }
      ],
      "name": "return",
      "valueCodeableConcept": {
        "coding": [
          {
            "code": "8480-6"
          }
        ]
      }
    }
  ]
}

According to the CQL IG FHIR type mapping, System.Concept maps to FHIR.CodeableConcept, so I believe my engine is returning the correct result to represent ToConcept(Code { code: '8480-6' }).

Start by reproducing CqlTypeOperatorsTest:ToConcept:CodeToConcept1 and inspect the test runner's value-comparison logic. Compare the expected Concept with the actual FHIR CodeableConcept shown in the issue; done means equivalent concept values are recognized as equal and the test passes.