The European Union is introducing tougher vehicle emissions tests in a move that could prevent another emissions cheating scandal.

Two new tests to measure emissions come into effect on 1st of September 2017, and apply to new cars before they are approved for sale throughout the bloc.

The new tests include the Worldwide harmonized Light vehicles Test Procedure (WLTP), replacing the heavily criticized New European Driving Cycle (NEDC) tests. The WLTP introduces new laboratory testing conditions for measuring harmful pollutant and CO2 emissions and is designed to prevent automakers from exploiting numerous loopholes to their advantage.

The second test, the Real Driving Emissions (RDE), measures pollutant emissions by driving tested vehicles on public roads over a wide range of conditions. RDE tests are being introduced to reliably confirm WLTP test results.

The European Automobile Manufacturers’ Association (ACEA) welcomes the two new tests for measuring emissions from cars and vans, it said in a statement.