The new test is failing ...

=== FAIL: arm64.docker.docker.integration.service TestSwarmErrorHandling (0.62s)
    swarm_test.go:35: assertion failed: expected error to contain "address already in use", got "Error response from daemon: could not choose an IP address to advertise since this system has multiple addresses on different interfaces (172.17.0.3 on eth0 and 172.22.0.1 on docker_gwbridge)"

The original test did this - so something similar probably needs to be carried over. It'd be worth looking in a bit more detail than I have at that function does, the migrated tests are likely to need something similar? ...

• moby/integration-cli/check_test.go

  Line 599 in d3e45f8

  testdaemon.WithSwarmPort(defaultSwarmPort+s.portIndex),

The test is renamed from TestSwarmAPIErrorHandling to TestSwarmErrorHandling ... the "API" in the old name hinted that the test's something to do with the API - but maybe something like TestSwarmSocketInUse would be better name?

(And, nit: blank line at the end of the test!)