Pull request approval is a recorded sign-off by a reviewer, other than the author, stating that a proposed code change in a pull request is acceptable to merge.
On GitHub, a reviewer submits a review with one of three outcomes: Comment, Approve, or Request changes. GitLab uses merge requests and approval rules. Other code hosts use similar workflows. In each case, the approval is stored with the pull request, so it shows who approved, when, and which version of the code they saw.
In simple terms, pull request approval answers:
- Did someone other than the author review this change?
- Did they approve it before it merged?
- Did the approval cover the code that actually shipped?
Why Pull Request Approval Matters
Pull request approval is often the main per-change record that a code change was reviewed before reaching production.
It matters because:
- It gives a second person a chance to catch bugs, security issues, and unintended changes.
- It creates dated, attributable evidence of review for each change.
- It supports segregation of duties by separating the author from the approver.
- It is one of the attributes auditors commonly check when they test change management.
How Pull Request Approval Works
A typical flow looks like this:
- An engineer opens a pull request from a feature branch.
- Automated checks, such as tests and scans, run on the proposed change.
- One or more reviewers read the diff and leave comments.
- A reviewer submits an approving review.
- If branch protection rules are met, the pull request can merge.
Branch protection is what makes approval required rather than optional. Without it, a pull request can often be merged with no approval at all.
Settings That Affect Approval Quality
The approval record is only as strong as the rules around it. Common settings on GitHub include:
| Setting | Why it matters |
|---|---|
| Required number of approvals | Sets whether at least one reviewer must approve |
| Dismiss stale approvals when new commits are pushed | Prevents an approval from covering code the reviewer never saw |
| Require approval of the most recent reviewable push | Requires someone other than the last pusher to approve the latest changes |
| Require review from code owners | Routes changes to people responsible for the affected files |
| Restrict who can bypass | Limits who can merge without the required approvals |
GitHub does not let a pull request author approve their own pull request. See GitHub's documentation on about pull request reviews and about protected branches for current behavior.
Pull Request Approval vs Related Terms
| Term | Primary job | How it relates |
|---|---|---|
| Pull request approval | Record that a reviewer approved a specific change | The per-change evidence |
| Branch protection | Enforce rules on how code reaches a branch | Makes approval required before merge |
| Workflow approval | Record approvals in any workflow | The general concept; pull request approval is one example |
| Change management | Control how changes reach production | The broader process that approval supports |
| Audit trail | Keep a chronological record of actions | Pull request history is part of the audit trail for code changes |
Evidence Themes Auditors May Expect
Auditors set their own procedures, but pull request approval evidence commonly includes:
- For each sampled change, the pull request showing the approving reviewer and timestamp
- Proof that the approver was not the author
- Proof that approval happened before merge, and after the last code change
- Passing status checks on the merged commit
- A link from the pull request to a ticket or other authorization, if your control requires one
- Branch protection settings showing approval was required during the audit period
Framework Notes
SOC 2
SOC 2 does not require pull requests by name. The AICPA Trust Services Criteria expect changes to be authorized, tested, approved, and implemented under CC8.1. Pull request approval is a common way software teams record the approval step. See CC8.1 Change Management Controls: What Auditors Test.
NIST and ISO
NIST SP 800-53 Rev. 5 addresses configuration change control, including review and approval of changes, in CM-3. ISO/IEC 27001:2022 Annex A includes change management (8.32) and secure development controls. Neither names pull requests; teams map approvals as an implementation.
Common Failures
- Approvals not required, so some changes merge with none
- Stale approvals still counted after new commits were pushed
- Rubber-stamp approvals with no visible review on large changes
- Admins or bots merging without approval and no follow-up review
- Approvals given in chat instead of on the pull request
- Changes reaching production outside pull requests, such as direct console or database edits
How AuditFlo.co Helps
AuditFlo.co helps teams retain continuous evidence collection and audit-period history for operational artifacts when those records are stored or linked through connected systems and workflows your team already uses, such as GitHub and Jira.
For pull request approval, that can mean dated history of reviews, merges, and linked tickets, so samples are easier to pull for the audit period. Your code host remains the system of record. AuditFlo.co does not review code, does not issue SOC 2 reports, does not certify compliance, and does not replace auditors.
To see the workflow for your stack, request a demo.
Key Takeaway
Pull request approval is the recorded sign-off, by someone other than the author, that a code change is ready to merge. It is strongest when branch protection requires it, stale approvals are dismissed, and bypass is limited. For audits, show who approved each sampled change, when, and that the approval covered the code that shipped.