The invention relates to a laser arrangement, in particular for ophthalmological laser surgery, comprising a laser source (14) for producing laser radiation, controllable scanning components (20) for adjusting a focus position of the laser radiation, measuring components (30) for detecting information which is representative of an actual position of the radiation focus, and a control arrangement (22) controlling the laser source and the scanning components. According to the invention, the control arrangement is configured to carry out a test run of at least some of the scanning components according to a predetermined test scanning pattern when the laser source is switched off, the test scanning pattern defining at least one scanning path for the radiation focus, and the control arrangement being configured to detect the actual focus position during a scanning movement along the scanning path several times in succession without the scanning movement stopping, and to determine a rated focus position in association with each actual focus position detected. The test run can ensure that the scanning components can move to all positions within an available scanning region even if the laser arrangement has previously experienced downtime.
