when:
        fails 'ambiguous'

        then:
        errorOutput.contains("Cannot resolve service by type for type 'CountingService' when there are two or more instances. Please also provide a service name. Instances found: counter1: CountingService, counter2: CountingService.")
    }

    def "can declare a service reference without a name when multiple services exist if a value is explicitly assigned"() {
        given:

                "counter",
                CountingService.class,
                (spec) -> {}
            );

            tasks.register('count', CountingTask) {
                ${ legacy ? """
                countingService.convention(altServiceProvider)
                usesService(altServiceProvider)
                """ : "" }
                ${ finalizeOnRead ? "countingService.finalizeValueOnRead()" : "" }

                    return value
                }
            }

            def countingService = gradle.sharedServices.registerIfAbsent("counting", CountingService) { }

            task runWork(type: ParameterTask) {
                isolationMode = '${isolationMode}'
                parameters {
                    testParam.set(countingService)
                }
            }
        """

        when:

                    return value
                }
            }

            def countingService = gradle.sharedServices.registerIfAbsent("counting", CountingService) {
            }
        """
        setupBuildWithColorTransform {
            params("""
                service = countingService
            """)
        }
        buildFile << """
            project(':a') {