During the Diamond League circuit opener in Xiamen, Chebet stormed to a 14:27.12 finish to outsprint Tesegay.
Moraa faded to a fifth-place finish at Franklin Field on Saturday, May 31, clocking 2:00.92 in the two-lap race.
Kipkorir was part of quartet that stormed to a 2:59.29 fifth-place finish at World Athletics Relays in China
Kenyan athletes eyeing Tokyo Worlds must undergo three surprise drug tests by August 29.
The meet will be staged at the iconic Hayward Field in Eugene, Oregon.
He clocked 10.07s in the race won by Australian Kennedy Lachlan in 9.98s.
The race was won in style by Olympian Lilian Odira, who posted a commanding 1:58.31.
Yego managed a season-best throw of 78.74m to settle for fifth position.
Organisers have billed the women's steeplechase lineup as one of the most electrifying races on the programme.
