The PGA Tour says it expects to have formulated an anti-doping policy by the end of this year.
Tour boss Tim Finchem has previously claimed golf does not have a problem with performance-enhancing drugs but says testing for them is now a reality.
"We're getting close to agreeing a policy. I suspect we'll be done with that certainly this year," he said.
"It's unfortunate that these realities are with us, but they are. We have to deal with them."
In the past Finchem has defended his tour's lack of a policy, suggesting it was not worth testing without any evidence that players were doping.
The LPGA, the women's professional tour, announced in February it planned to start drug testing players in 2008.
When we're completed fans will be able to look at it and be comfortable with the direction we're going
PGA Tour boss Tim Finchem
And the European Tour said last month that testing was also likely to start next year after the major international circuits had agreed on a list of banned substances.
The Royal & Ancient, which governs golf in all countries except the USA and Mexico, introduced drug testing for the first time at last year's world amateur team championship in South Africa.
Finchem believes the sport's governing bodies must work together to agree on drug testing rules.
"I feel strongly that golf needs to move together on a global basis. Move forward together with respect to what a rule is, and then beyond that in terms of the execution of the rule," he said.
"But it's a complicated subject so it's taken a little bit of time. We've put a lot of energy into it and we have for the last two years.
"When we're completed fans will be able to look at it and be comfortable with the direction we're going."