Abstract: A gas leak detection device for identifying a gas leak in a test object, comprising a connector (20) for the test object or a test chamber accommodating the test object, a vacuum pump (16, 18) connected to the connector (20) for evacuating the test object or the test chamber, a gas detector (12) connected to the vacuum pump (16, 18) and the connector (20) and configured for detection of a first test gas and for integral leak detection or for localized leak detection of a gas leak in the test object according to the spraying principle during continuous operation of the vacuum pump (16, 18), a gas pressure sensor (24) connected to the vacuum pump (16, 18) and the connector (20) and configured for integral measurement of the total pressure increase at the connector (20) according to the pressure increase method and/or the partial pressure increase of at least one second test gas different from the first test gas at the connector (20) according to the partial pressure increase method, and a blocking device (26) c