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.

  1. On GitHub, navigate to the main page of the repository.

  2. Under your repository name, click Settings. Repository settings button

  3. In the left menu, click Branches. Repository options sub-menu

  4. Under Protected Branches, select the branch you want to restrict using the drop-down menu. Selecting a protected branch drop-down menu

  5. Select Require pull request reviews before merging. Pull request review restriction checkbox

  6. Optionally, select Dismiss stale pull request approvals when new commits are pushed. This dismisses a pull request approval review when a code-modifying commit is pushed to the branch. Dismiss stale pull request approvals when new commits are pushed checkbox

  7. Optionally, if the repository is part of an organization, select Restrict who can dismiss pull request reviews to search for and select the people or teams who can dismiss pull request reviews. This option is not available for personal repositories. Restrict who can dismiss pull request reviews checkbox
  8. Optionally, select Include administrators. This enforces the required status checks on the repository administrators. Include administrators checkbox

  9. Click Save changes.

Further reading