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[Home](./index.md) &gt; [@contract-case/case-boundary](./case-boundary.md) &gt; [ContractCaseBoundaryConfig](./case-boundary.contractcaseboundaryconfig.md) &gt; [testRunId](./case-boundary.contractcaseboundaryconfig.testrunid.md)

## ContractCaseBoundaryConfig.testRunId property

Unique ID for this segment of the test run - it must be unique within a run, but need not be unique between test runs. This is an internal implementation detail, and authors of DSL layers shouldn't expose it to clients.

**Signature:**

```typescript
readonly testRunId?: string;
```