return String.format("Could not execute tests using %s.", connection.getDisplayName());
                }
            }));
        }
    }

    @Override
    public TestLauncher withTestsFor(Action<TestSpecs> testSpec) {
        DefaultTestSpecs testSpecs = new DefaultTestSpecs();
        testSpec.execute(testSpecs);
        taskSpecs.addAll(testSpecs.getTestSpecs());
        return this;
    }