  We examine high-cadence space photometry taken by the Transiting Exoplanet
Survey Satellite (TESS) of a sample of evolved massive stars (26 Wolf-Rayet
stars and 8 Luminous Blue Variables or candidate LBVs). To avoid confusion
problems, only stars without bright Gaia neighbours and without evidence of
bound companions are considered. This leads to a clean sample, whose
variability properties should truly reflect the properties of the WR and LBV
classes. Red noise is detected in all cases and its fitting reveals
characteristics very similar to those found for OB-stars. Coherent variability
is also detected for 20% of the WR sample. Most detections occur at moderately
high frequency (3--14/d), hence are most probably linked to pulsational
activity. This work doubles the number of WRs known to exhibit high-frequency
signals.
