With AC-coupling.
Be careful, most scopes have a DC high-impedance if you switch them to AC-coupling. In this case, the scope will see the full DC voltage even if you use a 1:100 probe.
I've build an AC-coupler to measure noise on voltages of up to 10kV. The design is very simple: In front is a coupling capacitor followed by a 9Meg resistor. A variable capacitor is used to trimm the capacities. This gives a flat frequency response from below 1Hz to 10MHz, which is way more than I needed.