Really? I have the test db without :all
With :all I received this messages:

  This task only modifies local databases. swagexpert_development is on a remote host.
  This task only modifies local databases. swagexpert_test is on a remote host.
  This task only modifies local databases. swagexpert_staging is on a remote host.
  This task only modifies local databases. swagexpert_production is on a remote host.