Arrangement for carrying out a self-load test, having a rail vehicle (LOK1, LOK2) that has a dual-mode drive system (GEN, HSPL), - in which a first drive system of the rail vehicle (LOK1, LOK2) comprises a diesel engine that is coupled to an electric generator in order to generate electrical power, - in which the output side of the generator is connected to a DC link via a first converter (WSGSW1), which is connected downstream of said generator and is connected as an AC/DC converter, so that the power delivered by the generator can be transmitted as required via the first converter (WSGSW1) into the DC link, - in which a second drive system (HSPL) of the rail vehicle has an electrical line system (HSPL) that is connected to the DC link via a second converter (WSGSW2), which is connected downstream of said electrical line system, so that power from the line system (HSPL) can be transmitted as required into the DC link, - in which the DC link is connected via a third converter (GSGSW) to a braking resistor that is arranged inside the rail vehicle (LOK1, LOK2), - in which the third converter (GSGSW) is connected as a DC/DC converter in order to transmit power that is no longer required from the DC link to the braking resistor during braking, - in which the braking resistor is dimensioned in such a way that it converts the power that is fed to it into heat, - in which, during a self-load test of the diesel engine, the diesel engine has a load applied to it, which in the maximum case corresponds to the nominal load of the diesel engine, for the purpose of suitability testing, - in which, during the self-load test, the generator, the first converter (WSGSW1), the DC link and the third converter (GSGSW) are connected in such a way that a first portion of the power that is generated by the diesel engine and passes via the first converter (WSGSW1) into the DC link is fed from there via the third converter (GSGSW), which is connected as a DC/DC converter, to the braking resistor, and - in which, during the self-load test, the generator, the first converter (WSGSW1), the DC link, the second converter (WSGSW2) and the line system (HSPL) are connected in such a way - that a second portion of the power that is generated by the diesel engine and passes via the first converter (WSGSW1) into the DC link is fed from there via the second converter (WSGSW2) to the line system (HSPL), and - that the power fed to the second converter (WSGSW2) is fed into the line system (HSPL). - in which a first drive system of the rail vehicle (LOK1, LOK2) comprises a diesel engine that is coupled to an electric generator in order to generate electrical power, - in which the output side of the generator is connected to a DC link via a first converter (WSGSW1), which is connected downstream of said generator and is connected as an AC/DC converter, so that the power delivered by the generator can be transmitted as required via the first converter (WSGSW1) into the DC link, - in which a second drive system (HSPL) of the rail vehicle has an electrical line system (HSPL) that is connected to the DC link via a second converter (WSGSW2), which is connected downstream of said electrical line system, so that power from the line system (HSPL) can be transmitted as required into the DC link, - in which the DC link is connected via a third converter (GSGSW) to a braking resistor that is arranged inside the rail vehicle (LOK1, LOK2), - in which the third converter (GSGSW) is connected as a DC/DC converter in order to transmit power that is no longer required from the DC link to the braking resistor during braking, - in which the braking resistor is dimensioned in such a way that it converts the power that is fed to it into heat, - in which, during a self-load test of the diesel engine, the diesel engine has a load applied to it, which in the maximum case corresponds to the nominal load of the diesel engine, for the purpose of suitability testing, - in which, during the self-load test, the generator, the first converter (WSGSW1), the DC link and the third converter (GSGSW) are connected in such a way that a first portion of the power that is generated by the diesel engine and passes via the first converter (WSGSW1) into the DC link is fed from there via the third converter (GSGSW), which is connected as a DC/DC converter, to the braking resistor, and - in which, during the self-load test, the generator, the first converter (WSGSW1), the DC link, the second converter (WSGSW2) and the line system (HSPL) are connected in such a way - that a second portion of the power that is generated by the diesel engine and passes via the first converter (WSGSW1) into the DC link is fed from there via the second converter (WSGSW2) to the line system (HSPL), and - that the power fed to the second converter (WSGSW2) is fed into the line system (HSPL). - that a second portion of the power that is generated by the diesel engine and passes via the first converter (WSGSW1) into the DC link is fed from there via the second converter (WSGSW2) to the line system (HSPL), and - that the power fed to the second converter (WSGSW2) is fed into the line system (HSPL).