Current testing/measuring apparatus (10) comprises a flexible member (12) having a first end (14) and a second end (16). In use, the flexible member (12) is arranged to locate around a conductor (11) carrying a current to be measured. In particular, the current measuring apparatus (10) comprises a Rogowski coil. The ends of the flexible member (12) are coupled together in use but a gap is created between the ends. This distance can generate errors in the current measurement and the present invention provides compensation means (28) in the form of a compensation windings. The compensation windings (30) comprise a planar spiral conductor provided on a printed circuit board to compensate for the separation distance between the first end and the second end.