}
    } catch (e: Throwable) {
      if (KNOWN_FAILURES.contains(testData.toString())) {
        System.err.println("Ignoring known failure: $testData")
        e.printStackTrace()
      } else {
        throw e
      }
    }
  }

  private fun testHttpUrl(testData: WebPlatformUrlTestData) {
    val url =
      when (testData.base) {