Test Runner Not Detecting Equal Long Values

When running the test CqlArithmeticFunctionsTest:Abs:AbsLong, the test runner reports:

Test CqlArithmeticFunctionsTest:Abs:AbsLong status: fail expected: 1L actual: 1L

My engine is returning the following result:

{
  "resourceType": "Parameters",
  "parameters": [
    {
      "extension": [
        {
          "url": "http://hl7.org/fhir/StructureDefinition/cqf-cqlType",
          "valueString": "System.Long"
        }
      ],
      "name": "return",
      "valueString": "1L"
    }
  ]
}

According to the CQL IG FHIR type mapping, System.Long maps to FHIR.string in R4, so I believe my engine is returning the correct result to represent 1L.

NOTE: I also tried returning it with "valueString": "1" instead of "valueString": "1L", but that also failed.

Start with the runner path that evaluates CqlArithmeticFunctionsTest:Abs:AbsLong and inspect how the expected and actual values are parsed and compared. Reproduce the failure with the reported Parameters payload, including both 1L and 1 representations, and consider the issue done when equal long results are recognized consistently.