The former couple wed in August 2011 but announced their divorce just 72 days later, with Humphries since claiming their marriage was a fraud.
According to Radar Online, Humphries plans to argue in his court case that Kardashian often pushed him out of her photographs when together so that she would receive the maximum amount of attention.
"Kris plans on testifying at the upcoming divorce trial that Kim would often tell him to get out of the shot when photographers would descend upon them," a source told the site.
"Kim would complain that because of Kris's height, he was blocking the photographers' clear shot of her. Kim would get very upset if he didn't move quickly enough."
The insider continued: "The reason for doing this - so that the press could get an unobstructed view of Kim's outfit. Kim would pore over what the press was writing about her, and she would become upset if her picture didn't look good."
Humphries recently denied revealing private facts about Kardashian to his ex-girlfriend Myla Sinanaj.