test the waters
US /tɛst ðə ˈwɔtərz/
UK /tɛst ðə ˈwɔtərz/

1.
sondar o terreno, testar as águas
to try something out cautiously before committing oneself to it
:
•
Before investing all his savings, he decided to test the waters with a small amount.
Antes de investir todas as suas economias, ele decidiu sondar o terreno com uma pequena quantia.
•
The company is testing the waters with a new product in a limited market.
A empresa está sondando o terreno com um novo produto em um mercado limitado.