Repository administrators can enforce required reviews so that pull requests must have at least one approved review before they are merged.
Note: Before enabling required reviews on a branch, you must first set the branch up as a protected branch.
On GitHub Enterprise, navigate to the main page of the repository.
Under your repository name, click Settings.
In the left menu, click Branches.
Under Protected Branches, select the branch you want to restrict using the drop-down menu.
Select Require pull request reviews before merging.
Optionally, select Include administrators. This enforces the required pull request reviews on the repository administrators.
Click Save changes.
