  Studies of magnetic fields in the most evolved massive stars, the Wolf-Rayet
stars, are of special importance because they are progenitors of certain types
of supernovae. The first detection of a magnetic field of the order of a few
hundred Gauss in the WN7 star WR55, based on a few FORS2 low-resolution
spectropolarimetric observations, was reported in 2020. In this work we present
new FORS2 observations allowing us to detect magnetic and spectroscopic
variability with a period of 11.90 h. No significant frequencies were detected
in TESS and ASAS-SN photometric observations. Importantly, magnetic field
detections are achieved currently only in two Wolf-Rayet stars, WR6 and WR55,
both showing the presence of corotating interacting regions.
