  Pulsar binaries, in particular redback systems, provide good sources to study
the pulsar wind flow and its interaction with the companion stars. {\it
Fermi}-LAT have proposed probable pulsar binary candidates in its catalogs. To
identify pulsar binary sources from the catalog, orbital modulation search of
binary candidates is an effective way. TESS observes in survey mode for a large
part of the sky and thus provide an excellent data set to periodicity search of
pulsar binary candidates by observing the flux variation, thought to mainly
come from the stellar companion. Using TESS data we look for flux modulation of
five pulsar binaries (or candidates) with reported orbital periods, including
PSR J1023+0038, 3FGL J0523.3-2528, 3FGL J0212.1+5320, 3FGL J0744.1-2523 and PSR
J1417-4402, demonstrating that TESS photometric data are very useful in
identifying periodicities of redback-like systems. This method can be effective
in searches for new pulsar binaries or similar binary systems in the future.
