A microfluidic device comprising a flow channel with an inlet and a gas escape opening is described. The flow channel comprises a liquid flow channel section and a flow controlling section downstream to the liquid flow channel section and upstream to or coinciding with the gas escape opening. The flow controlling section provides a flow resistance to gas, which is sufficiently high to reduce velocity of a capillary flow of a liquid in the liquid flow channel section. The microfluidic device with the flow controlling section provides a device in which the velocity of the flow can be reduced to a desired level. Also is described a method of performing a test using the microfluidic device.
