The singer, who was the musical attraction of the latest episode of the show, would not have arrived early enough to participate in the trial.
According to TMZ, the choreographer of the star would have been sent to say that Rihanna was sick.
That was enough to irritate Lorne Michaels, executive producer of SNL, which insists that all guests participate in the trials.
Later, the artist of 24 years was seen walking across the stage between performances with an apple in his hand. Team members would have been upset by the episode, as the star did not look sick enough to have missed the test.
A representative of the singer insisted on the impossibility of attending to the site and said: "Rihanna was sick and needed to save his voice for live performance."