The Green Party leader says his party will support Minister Simon Coveney in an upcoming no confidence motion.
Eamon Ryan says while mistakes were made in the Katherine Zappone controversy, the Government's work is more important.
He told Newstalk Breakfast the parties need to 'pull each other up' on such issues.
"There were mistakes made, the process wasn't right - but we believe that the Government has important work to do.
"It is a well-functioning Government, we work well together.
"Each of us will make mistakes, there'll be things that we need to change and pull each other up on, but this is a Government that... has in my mind managed our way through incredibly difficult COVID crisis."
But he says the coalition needs to focus on the recovery.
"We have to apply the same discipline and the same attention to detail now on the bigger challenge we have - which is to address the ecological crisis we're in and get our people back working and deliver Sláintecare.
"There's a whole list of projects - last but not least - delivering on housing policy.
"And I think the Housing for All strategy we published last week.... is the right way to go, and it's our job now to go out and deliver that.
"And that's why we will be voting against the motion of no confidence."
He was speaking as the Green Party meets in Dublin for a pre-Dáil conference.
The party is set to examine proposals around reforming the country's rail system.
Minister Ryan says freight could be the answer to under-utilised, or unviable, rail lines.
"We had this incredibly dense rail network - we lost most of it - but we still have a network and it's not being fully utilised in my mind.
"One of the economic cases for this is to start thinking could we move freight on these lines.
"And not have all trucks going through all our towns and villages and driving everywhere around the country.
"Freight and rail can have real economic benefits".
