Peter Dutton says concerns about a telephone call between the prime minister and NSW police chief are a "storm in a teacup".
The home affairs minister has dismissed Labor's concerns about the conversation, which centred on a police investigation into Energy Minister Angus Taylor.
Scott Morrison has been accused of interfering in the police inquiry, either by accident or design.
Mr Dutton said the opposition was "desperately scratching around for a win" by focusing on the scandal.
"It is a storm in a tea cup," he told the Nine Network on Friday.
"He was trying to get the facts of the case."
Senate crossbencher Jacqui Lambie said the phone call was not a good look.
"I can tell you now it was not a smart move - I would not have done that if I was the prime minister," she told ABC radio.
"It does not look good, it is not good. It doesn't matter what was discussed, now everybody out there is concerned and saying, 'My goodness me, you're covering the butt of your own people here'."
Mr Taylor is under investigation for giving a newspaper doctored documents to attack the travel expenses of the Sydney lord mayor.
As the scandal drags on, Labor is refusing to grant the minister a pair to attend an international energy forum next week.
"Angus Taylor has too many deeply serious questions to answer here in Australia to be jetting off overseas," opposition frontbencher Mark Butler told reporters.
"The idea that he should be allowed to skip the parliament and jet overseas in the face of all of that scandal, frankly, is jaw-dropping."
Australian Associated Press