Testing started in the tunnel on March 1 after AlpTransit received approval from Swiss Federal Office of Transport on February 17. The first test runs took place with ETCS Level 2 train protection system. Testing of the GSM-R digital radio and tunnel radio also started using a Swiss Federal Railways (SBB) radio test vehicle.

However, testing was interrupted in mid-March due to the coronavirus pandemic. AlpTransit was allowed to resume testing on April 20 in strict compliance with the requirements of the Federal Office of Public Health (BAG). 

On April 29 high-altitude test running started using the ICE-S high-speed measuring train leased from Germany. During these high-speed runs, the speed was gradually increased and the first test run at the maximum speed of 275km/h took place during the night of April 30-May 1.

Numerous test runs are planned in the tunnel between Camorino and Vezia until the handover of the Ceneri base tunnel to SBB on September 1.

Construction of the base tunnel began in 2006 and it is the final section of the Z├╝rich - Milan corridor upgrade project, which also included the Gotthard Base Tunnel. Opening of the Ceneri Base Tunnel will cut journey times between the two cities to less than three hours.

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