diff --git a/.grenrc.cjs b/.grenrc.cjs
index 1ca10b24..69fcf4d5 100644
--- a/.grenrc.cjs
+++ b/.grenrc.cjs
@@ -1,8 +1,11 @@
 module.exports = {
-  dataSource: "commits",
+  dataSource: "prs",
   tags: "all",
   prefix: "v",
+  // 5.0.0 was released on the 7th, and the cutoff is exclusive.
+  frozenBefore: "2026-09-08",
   ignoreIssuesWith: ["duplicate", "wontfix", "invalid", "help wanted"],
+  ignoreCommitsWith: ["^Release \\d"],
   username: "cjbarth",
   repo: "github-release-notes",
   template: {
@@ -11,5 +14,7 @@ module.exports = {
   groupBy: {
     "Enhancements:": ["enhancement", "internal"],
     "Bug Fixes:": ["bug"],
+    // Without a catch-all, a pull request whose labels match no group is dropped in silence.
+    "Other:": ["..."],
   },
 };
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 79f8d2de..49926b7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,7 +11,6 @@
 
 ## v4.3.0 (2025-04-17)
 
-- [Release 4.3.0](https://github.com/cjbarth/github-release-notes/commit/10fffd5e0fcf16215d2c151f7926b76269467057) - @cjbarth
 - [Rework sorting to account for parents and date (#12)](https://github.com/cjbarth/github-release-notes/commit/ba1fc4bf49722950f9476facd725940b1150ac02) - @cjbarth
 - [Sort commits by parent, then date (#11)](https://github.com/cjbarth/github-release-notes/commit/b55a29a783e3c0f69299a0b45563c081e618a63e) - @cjbarth
 - [Update dependencies (#10)](https://github.com/cjbarth/github-release-notes/commit/84cc103cf23ca8244b80a024f0fc27c674983aa0) - @cjbarth
@@ -20,7 +19,6 @@
 
 ## v4.2.0 (2023-09-05)
 
-- [Release 4.2.0](https://github.com/cjbarth/github-release-notes/commit/fa9e966b56872cee12980922be4e0ed94ae0eabb) - @cjbarth
 - [Format using prettier (#9)](https://github.com/cjbarth/github-release-notes/commit/b8fd1b6a01ef30ba0f2458a86ebd56991a911e44) - @cjbarth
 - [Update README (#8)](https://github.com/cjbarth/github-release-notes/commit/bb476de6b36057ef694b55002e3877b88f93b0ab) - @cjbarth
 - [Use application version number for head of changelog (#7)](https://github.com/cjbarth/github-release-notes/commit/aaae7e0b07fa2078dec4096074a061aaf40a0439) - @cjbarth
@@ -30,7 +28,6 @@
 
 ## v4.1.0 (2023-07-14)
 
-- [Release 4.1.0](https://github.com/cjbarth/github-release-notes/commit/c09f024a189c2a3494c21a85cce9f04e4b986995) - @cjbarth
 - [Add basic workflow for PR testing before merge (#5)](https://github.com/cjbarth/github-release-notes/commit/346d5ff6d90bbcde5d3a6264e63d250168daeebb) - @cjbarth
 - [Adjust tests to account for default branch (#4)](https://github.com/cjbarth/github-release-notes/commit/fdc118304f58692165a95b31de8fed299479f3ae) - @cjbarth
 - [Use current branch as default branch (#3)](https://github.com/cjbarth/github-release-notes/commit/16b30918eec4a2e73e4164880904034f9a457d50) - @cjbarth
@@ -40,7 +37,6 @@
 
 ## v4.0.0 (2023-04-12)
 
-- [Release 4.0.0](https://github.com/cjbarth/github-release-notes/commit/934e728b5e87e941a5f5f2bcef457e47e423f41b) - @cjbarth
 - [Build changelog as part of release process](https://github.com/cjbarth/github-release-notes/commit/3e87029e162fdaa1a7e542e906152e4da5ac0d7b) - @cjbarth
 - [Update to release-it@15](https://github.com/cjbarth/github-release-notes/commit/cb70224198557df28fb122766131bf84608dcfdc) - @cjbarth
 - [Update all semver-minor dependencies](https://github.com/cjbarth/github-release-notes/commit/a372f19c67bfec2993c3740f9e386771852ced73) - @cjbarth
@@ -53,7 +49,6 @@
 
 ## v3.0.1 (2023-04-11)
 
-- [Release 3.0.1](https://github.com/cjbarth/github-release-notes/commit/9a1c586c10982040379c2c13a5b41822cc9c3bc0) - @cjbarth
 - [Ensure that PRs are sorted by merge date](https://github.com/cjbarth/github-release-notes/commit/18007c9a6e3a7c480ac325bb77ffbb81f1b0744f) - @cjbarth
 - [Ensure that PRs are sorted by merge date](https://github.com/cjbarth/github-release-notes/commit/6990df20ca9fa1277787ff60a50941d3fdfde7c2) - @cjbarth
 
@@ -61,14 +56,12 @@
 
 ## v3.0.0 (2022-10-13)
 
-- [Release 3.0.0](https://github.com/cjbarth/github-release-notes/commit/e5b88259c599fbeed648464d4977ff7e0b314b40) - @cjbarth
 - [Stably sort commits](https://github.com/cjbarth/github-release-notes/commit/51ac5a1835cbb28ebecbf2913b6d8c3e52010dfc) - @cjbarth
 
 ---
 
 ## v2.1.0 (2022-10-12)
 
-- [Release 2.1.0](https://github.com/cjbarth/github-release-notes/commit/ebfdcaf83493c8124a04764bbc224f7a56796025) - @cjbarth
 - [Update changelog](https://github.com/cjbarth/github-release-notes/commit/3cee2ddaa27be24cba1cb439f165b3ad03265b1d) - @cjbarth
 - [Adjust tests to support new features](https://github.com/cjbarth/github-release-notes/commit/4cd37e9163785570c59de913fb9ecca95f9ddeab) - @cjbarth
 - [Update changelog](https://github.com/cjbarth/github-release-notes/commit/c2d01f485bc725c0f5b98b142771591cc842b0f7) - @cjbarth
@@ -78,7 +71,6 @@
 
 ## v2.0.0 (2022-08-26)
 
-- [Release 2.0.0](https://github.com/cjbarth/github-release-notes/commit/7024505d127242a55822a8cd76b36ea6ba4829f8) - @cjbarth
 - [Update changelog](https://github.com/cjbarth/github-release-notes/commit/2ba7ee5d15e69085234e3b112191a966ed32ad7b) - @cjbarth
 - [Add option to get commits since last tag; don't skip any commits](https://github.com/cjbarth/github-release-notes/commit/73ba41a7dd926bc9e65e379ae5916736fd78ad18) - @cjbarth
 - [Update tests for fork and new features](https://github.com/cjbarth/github-release-notes/commit/59f222ac706c5cf0c1737158552cd8482aeb7ea4) - @cjbarth
@@ -92,7 +84,6 @@
 
 ## v1.0.1 (2022-04-01)
 
-- [Release 1.0.1](https://github.com/cjbarth/github-release-notes/commit/8bd16d19cbc26bd77a73983423a20556df88f519) - @cjbarth
 - [Fix broken build by rolling back eslint updates](https://github.com/cjbarth/github-release-notes/commit/0d0336f6d285f97c2003b6cfe0813542802b64d7) - @cjbarth
 - [Update README for new project name](https://github.com/cjbarth/github-release-notes/commit/dc1a6d5285d4921cdf3b63891ee69a7a413655d0) - @cjbarth
 - [Update release-it to auto-build](https://github.com/cjbarth/github-release-notes/commit/dbdcfd9a27a260d88952c2fc8319fcf2d3116367) - @cjbarth
@@ -101,7 +92,6 @@
 
 ## v1.0.0 (2022-04-01)
 
-- [Release 1.0.0](https://github.com/cjbarth/github-release-notes/commit/25698b89794422434caf8667dbee156e4fa25275) - @cjbarth
 - [Update packages, semver-major](https://github.com/cjbarth/github-release-notes/commit/ec3c201f6bacc0d98da7046d6107b2deccfb2812) - @cjbarth
 - [Update packages, semver-minor](https://github.com/cjbarth/github-release-notes/commit/bd75ecfeb3d21eb3dcf81faf6a4595c4755a136e) - @cjbarth
 
@@ -109,7 +99,6 @@
 
 ## v0.18.0 (2021-09-25)
 
-- [Release 0.18.0](https://github.com/cjbarth/github-release-notes/commit/2f4719d4a9997ae8d38db4cf1fe1e71183f35f59) - @cjbarth
 - [Update package.json](https://github.com/cjbarth/github-release-notes/commit/f2fea79abb3300381744faed0d11ef539ddf676c) - @cjbarth
 - [Add release-it](https://github.com/cjbarth/github-release-notes/commit/5f4b37dcf1c3bb7a02f5a69b29f989cae803757c) - @cjbarth
 - [Fix tests](https://github.com/cjbarth/github-release-notes/commit/ecceb7ca1d1e80a5ba88b4fbf9863dd673b05bde) - @cjbarth
@@ -370,29 +359,19 @@ _No changelog for this release._
 
 ---
 
-## v0.3.3 (2017-03-14)
-
-_No changelog for this release._
+## v0.6.3 (2017-03-14)
 
----
+### Bug Fixes
 
-## v0.5.0 (2017-03-14)
+- [#48](https://github.com/github-tools/github-release-notes/issues/48) Fix multiple repo information
 
-### Enhancements
+---
 
-- [#20](https://github.com/github-tools/github-release-notes/issues/20) Specify which tag to build
-- [#18](https://github.com/github-tools/github-release-notes/issues/18) Create global version of the module
-- [#16](https://github.com/github-tools/github-release-notes/issues/16) Update the documentation
-- [#14](https://github.com/github-tools/github-release-notes/issues/14) Add the chance to override the latest release body
-- [#13](https://github.com/github-tools/github-release-notes/issues/13) Check the network
-- [#11](https://github.com/github-tools/github-release-notes/issues/11) Add tests
-- [#10](https://github.com/github-tools/github-release-notes/issues/10) Use the issues as data source
-- [#9](https://github.com/github-tools/github-release-notes/issues/9) Get the information from the local git config
-- [#7](https://github.com/github-tools/github-release-notes/issues/7) Add the possibility to create a CHANGELOG file
+## v0.6.2 (2017-03-14)
 
 ### Bug Fixes
 
-- [#15](https://github.com/github-tools/github-release-notes/issues/15) Manage the scenario where there is only one tag
+- [#45](https://github.com/github-tools/github-release-notes/issues/45) Remove unused option user.name
 
 ---
 
@@ -408,19 +387,40 @@ _No changelog for this release._
 
 ---
 
-## v0.6.2 (2017-03-14)
+## v0.6.0 (2017-03-14)
+
+### Enhancements
+
+- [#32](https://github.com/github-tools/github-release-notes/issues/32) Unwrap github-api promises
+- [#26](https://github.com/github-tools/github-release-notes/issues/26) Use external config file
+- [#23](https://github.com/github-tools/github-release-notes/issues/23) Introduce templates for the issues
+- [#19](https://github.com/github-tools/github-release-notes/issues/19) Add an "ignore label" flag
+- [#12](https://github.com/github-tools/github-release-notes/issues/12) Add the chance to rebuild the history of release notes
 
 ### Bug Fixes
 
-- [#45](https://github.com/github-tools/github-release-notes/issues/45) Remove unused option user.name
+- [#29](https://github.com/github-tools/github-release-notes/issues/29) Remove escaping character on regex
+- [#24](https://github.com/github-tools/github-release-notes/issues/24) The changelog action doesn't compile latest release
 
 ---
 
-## v0.6.3 (2017-03-14)
+## v0.5.0 (2017-03-14)
+
+### Enhancements
+
+- [#20](https://github.com/github-tools/github-release-notes/issues/20) Specify which tag to build
+- [#18](https://github.com/github-tools/github-release-notes/issues/18) Create global version of the module
+- [#16](https://github.com/github-tools/github-release-notes/issues/16) Update the documentation
+- [#14](https://github.com/github-tools/github-release-notes/issues/14) Add the chance to override the latest release body
+- [#13](https://github.com/github-tools/github-release-notes/issues/13) Check the network
+- [#11](https://github.com/github-tools/github-release-notes/issues/11) Add tests
+- [#10](https://github.com/github-tools/github-release-notes/issues/10) Use the issues as data source
+- [#9](https://github.com/github-tools/github-release-notes/issues/9) Get the information from the local git config
+- [#7](https://github.com/github-tools/github-release-notes/issues/7) Add the possibility to create a CHANGELOG file
 
 ### Bug Fixes
 
-- [#48](https://github.com/github-tools/github-release-notes/issues/48) Fix multiple repo information
+- [#15](https://github.com/github-tools/github-release-notes/issues/15) Manage the scenario where there is only one tag
 
 ---
 
@@ -432,41 +432,30 @@ _No changelog for this release._
 
 ---
 
-## v0.6.0 (2017-03-14)
-
-### Enhancements
-
-- [#32](https://github.com/github-tools/github-release-notes/issues/32) Unwrap github-api promises
-- [#26](https://github.com/github-tools/github-release-notes/issues/26) Use external config file
-- [#23](https://github.com/github-tools/github-release-notes/issues/23) Introduce templates for the issues
-- [#19](https://github.com/github-tools/github-release-notes/issues/19) Add an "ignore label" flag
-- [#12](https://github.com/github-tools/github-release-notes/issues/12) Add the chance to rebuild the history of release notes
-
-### Bug Fixes
+## v0.3.3 (2017-03-14)
 
-- [#29](https://github.com/github-tools/github-release-notes/issues/29) Remove escaping character on regex
-- [#24](https://github.com/github-tools/github-release-notes/issues/24) The changelog action doesn't compile latest release
+_No changelog for this release._
 
 ---
 
-## v0.2.2 (2017-03-10)
+## v0.3.2 (2017-03-10)
 
 _No changelog for this release._
 
 ---
 
-## v0.3.0 (2017-03-10)
+## v0.3.1 (2017-03-10)
 
 _No changelog for this release._
 
 ---
 
-## v0.3.1 (2017-03-10)
+## v0.3.0 (2017-03-10)
 
 _No changelog for this release._
 
 ---
 
-## v0.3.2 (2017-03-10)
+## v0.2.2 (2017-03-10)
 
 _No changelog for this release._
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index cb3ccb5e..b6fb9774 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,7 +53,7 @@ It's easier to review the PR, if you rebase your commits so that every commit re
 
 e.g.
 
-```
+```text
 Closes #123
 
 Here any further informations needed to the reviewer, e.g. run yarn before reviewing.
diff --git a/README.md b/README.md
index aff69ceb..c08d4db0 100644
--- a/README.md
+++ b/README.md
@@ -54,20 +54,22 @@ The process, [as explained here](https://help.github.com/articles/creating-relea
 
 Let `gren` take care of that for you. It automates this process and also writes release notes for you, creating something like this:
 
-> ## v0.6.0 (14/03/2017)
->
-> #### Framework Enhancements
->
-> - [#32](https://github.com/github-tools/github-release-notes/issues/32) Unwrap github-api promises
-> - [#26](https://github.com/github-tools/github-release-notes/issues/26) Use external config file
-> - [#23](https://github.com/github-tools/github-release-notes/issues/23) Introduce templates for the issues
-> - [#19](https://github.com/github-tools/github-release-notes/issues/19) Add an "ignore label" flag
-> - [#12](https://github.com/github-tools/github-release-notes/issues/12) Add the chance to rebuild the history of release notes
->
-> #### Bug Fixes
->
-> - [#29](https://github.com/github-tools/github-release-notes/issues/29) Remove escaping character on regex
-> - [#24](https://github.com/github-tools/github-release-notes/issues/24) The changelog action doesn't compile latest release
+```markdown
+## v0.6.0 (14/03/2017)
+
+#### Framework Enhancements
+
+- [#32](https://github.com/github-tools/github-release-notes/issues/32) Unwrap github-api promises
+- [#26](https://github.com/github-tools/github-release-notes/issues/26) Use external config file
+- [#23](https://github.com/github-tools/github-release-notes/issues/23) Introduce templates for the issues
+- [#19](https://github.com/github-tools/github-release-notes/issues/19) Add an "ignore label" flag
+- [#12](https://github.com/github-tools/github-release-notes/issues/12) Add the chance to rebuild the history of release notes
+
+#### Bug Fixes
+
+- [#29](https://github.com/github-tools/github-release-notes/issues/29) Remove escaping character on regex
+- [#24](https://github.com/github-tools/github-release-notes/issues/24) The changelog action doesn't compile latest release
+```
 
 _(yes, this is one of_ 🤖 _'s actual releases)_
 
@@ -102,15 +104,17 @@ Even though it doesn't require a machine-readable commit, it is still better to
 
 The output then uses commit messages (title + description) to look something like:
 
-> ## v0.9.0 (17/05/2017)
->
-> - Filter milestones (#75)
->   - Create milestones data-source option
->   - Add documentation for the milestones option
-> - Support GitHub enterprise (#73)
->   - Support GitHub enterprise
->   - Add api-url to options documentation
-> - Update CHANGELOG.md
+```markdown
+## v0.9.0 (17/05/2017)
+
+- Filter milestones (#75)
+  - Create milestones data-source option
+  - Add documentation for the milestones option
+- Support GitHub enterprise (#73)
+  - Support GitHub enterprise
+  - Add api-url to options documentation
+- Update CHANGELOG.md
+```
 
 #### Help 🤖 to write wonderful stuff (commits)
 
@@ -227,7 +231,7 @@ export GREN_GITHUB_TOKEN=your_token_here
 
 Show the internet that you use gren for automating your release notes -> [![Automated Release Notes by gren](https://img.shields.io/badge/%F0%9F%A4%96-release%20notes-00B2EE.svg)](https://github.com/cjbarth/github-release-notes)
 
-```
+```markdown
 [![Automated Release Notes by gren](https://img.shields.io/badge/%F0%9F%A4%96-release%20notes-00B2EE.svg)](https://github.com/cjbarth/github-release-notes)
 ```
 
@@ -320,7 +324,7 @@ pick one explicitly. A config hosted remotely (via the `gren` field in
 
 If you need help to create the configuration file, you can run the following command and follow the instructions
 
-```
+```shell
 gren init
 ```
 
diff --git a/lib/src/Gren.js b/lib/src/Gren.js
index d3cf1615..787b742e 100644
--- a/lib/src/Gren.js
+++ b/lib/src/Gren.js
@@ -817,7 +817,8 @@ class Gren {
     return generate(
       {
         sha,
-        message: message.split("\n")[0],
+        // A stray space at either end would land inside the link text and read as [ text ].
+        message: message.split("\n")[0].trim(),
 
         url: html_url,
         author: author && author.login,
@@ -1004,7 +1005,7 @@ class Gren {
       name: this.options.prefix + range[0].name,
       release: range[0].name,
       published_at: range[0].date,
-      body: this._generateCommitsBody(range[2]) + "\n",
+      body: this._templateBody(this._generateCommitsBody(range[2]).split("\n").filter(Boolean)),
     }));
 
     loaded(`Commit ranges loaded: ${ranges.length}`);
@@ -1693,7 +1694,10 @@ class Gren {
       totalPages = this._getLastPage(response.headers.link);
       page++;
       allCommits.push(...response.data);
-    } while (page < totalPages);
+      // page has already been moved on to the next one to ask for, so the last page GitHub
+      // reports is still to come. Stopping short of it drops the oldest commits on the branch,
+      // and with them every tag that points at one.
+    } while (page <= totalPages);
 
     return allCommits;
   }
@@ -1862,6 +1866,12 @@ class Gren {
     const cutoff = existingSections && this._getFrozenCutoff();
     const generated = selected.filter((release) => !(cutoff && Date.parse(release.date) < cutoff));
 
+    const unreleased = selected.find(({ ref }) => ref === this.options.head);
+
+    if (unreleased && !(cutoff && Date.parse(unreleased.date) < cutoff)) {
+      await this._validateHeadIsPushed(this.options.head);
+    }
+
     // A shallow clone has every tag but not the commits between them, which would leave
     // pull requests out of the release notes without any way to tell.
     if (generated.length && git.isShallow()) {
@@ -2068,6 +2078,39 @@ class Gren {
     return releases.concat(latest ? [latest] : []);
   }
 
+  /**
+   * Check the branch being released is where GitHub has it
+   *
+   * Tags are checked against GitHub, and the commits of a release are read from the local
+   * repository, so a branch that has not been pushed would put work in the release notes that
+   * nobody else can see.
+   *
+   * @private
+   *
+   * @param  {string} branch
+   */
+  async _validateHeadIsPushed(branch) {
+    let remote;
+
+    try {
+      const { data } = await this.octokit.rest.repos.getBranch({ ...this.repoParams, branch });
+
+      remote = data.commit.sha;
+    } catch (error) {
+      throw chalk.red(
+        `\nCould not read the branch "${branch}" from GitHub: ${error.message}. ` +
+          "The release notes are written for the branch as it is there.",
+      );
+    }
+
+    if (remote !== git.commitSha(branch)) {
+      throw chalk.red(
+        `\nThe branch "${branch}" is at a different commit here than on GitHub. ` +
+          "Push it, or fetch, so that the release notes describe what everyone else sees.",
+      );
+    }
+  }
+
   /**
    * Get the date before which releases are frozen
    *
diff --git a/lib/src/_git.js b/lib/src/_git.js
index fcb55772..0d7b1a53 100644
--- a/lib/src/_git.js
+++ b/lib/src/_git.js
@@ -144,6 +144,17 @@ function isShallow() {
  *
  * @return {boolean}
  */
+/**
+ * Get the commit a ref points to
+ *
+ * @param  {string} ref A tag, branch or SHA
+ *
+ * @return {string} The full SHA
+ */
+function commitSha(ref) {
+  return git(["rev-parse", `${ref}^{commit}`]);
+}
+
 function refExists(ref) {
   try {
     git(["rev-parse", "--verify", "--quiet", `${ref}^{commit}`]);
@@ -161,4 +172,5 @@ export {
   commitDate,
   isShallow,
   refExists,
+  commitSha,
 };
diff --git a/test/Gren.membership.spec.js b/test/Gren.membership.spec.js
index 6e44cf2a..55e9f6b6 100644
--- a/test/Gren.membership.spec.js
+++ b/test/Gren.membership.spec.js
@@ -41,7 +41,7 @@ describe("Gren release membership", () => {
    *
    * @return {Gren}
    */
-  const createGren = ({ remoteTags = ALL_TAGS, ...options } = {}) => {
+  const createGren = ({ remoteTags = ALL_TAGS, headSha, ...options } = {}) => {
     const gren = new Gren({
       token: "test-token",
       username: "owner",
@@ -63,6 +63,9 @@ describe("Gren release membership", () => {
       rest: {
         repos: {
           listReleases: async () => ({ headers: {}, data: [] }),
+          getBranch: async ({ branch }) => ({
+            data: { commit: { sha: headSha ?? git.commitSha(branch) } },
+          }),
           listTags: async () => ({
             data: remoteTags.map((name) => ({
               name,
@@ -509,6 +512,30 @@ describe("Gren release membership", () => {
       }
     });
 
+    it("Should stop when the branch is at a different commit than on GitHub", async () => {
+      const gren = createGren({ headSha: "0".repeat(40) });
+
+      try {
+        await gren._getReleaseBlocks();
+        assert.fail("An unpushed branch should stop the changelog");
+      } catch (error) {
+        assert.include(String(error), 'The branch "master" is at a different commit');
+      }
+    });
+
+    it("Should not ask about the branch when the version is already tagged", async () => {
+      // Nothing is read from the branch, so it does not matter where GitHub has it.
+      const blocks = await createGren({
+        headSha: "0".repeat(40),
+        version: "2.0.0",
+      })._getReleaseBlocks();
+
+      assert.deepEqual(
+        blocks.map(({ release }) => release),
+        ["v2.0.0", "v1.2.1", "v1.2.0", "v1.1.1", "v1.1.0", "v1.0.0"],
+      );
+    });
+
     it("Should stop when the local repository has a truncated history", async () => {
       const shallow = fs.mkdtempSync(path.join(os.tmpdir(), "gren-shallow-"));
 
diff --git a/test/Gren.pagination.spec.js b/test/Gren.pagination.spec.js
new file mode 100644
index 00000000..4ebd0262
--- /dev/null
+++ b/test/Gren.pagination.spec.js
@@ -0,0 +1,62 @@
+import { assert } from "chai";
+import Gren from "../lib/src/Gren.js";
+
+describe("Gren pagination", () => {
+  /**
+   * Create a Gren whose GitHub lists a branch's commits over the given number of pages
+   *
+   * @param  {number} pages
+   *
+   * @return {Object} { gren, requested }, where requested collects the pages asked for
+   */
+  const createGren = (pages) => {
+    const gren = new Gren({
+      token: "test-token",
+      username: "owner",
+      repo: "current",
+      head: "master",
+      version: "1.0.0",
+      quiet: true,
+    });
+    const requested = [];
+
+    gren.octokit = {
+      rest: {
+        repos: {
+          listCommits: async ({ page }) => {
+            requested.push(page);
+
+            return {
+              headers:
+                pages > 1 ? { link: `<https://api.github.com/x?page=${pages}>; rel="last"` } : {},
+              data: [{ sha: `commit-on-page-${page}` }],
+            };
+          },
+        },
+      },
+    };
+
+    return { gren, requested };
+  };
+
+  describe("_getAllCommitsForBranch", () => {
+    it("Should read every page GitHub reports", async () => {
+      const { gren, requested } = createGren(4);
+      const commits = await gren._getAllCommitsForBranch("master");
+
+      assert.deepEqual(requested, [1, 2, 3, 4], "Stopping early hides the oldest commits");
+      assert.deepEqual(
+        commits.map(({ sha }) => sha),
+        ["commit-on-page-1", "commit-on-page-2", "commit-on-page-3", "commit-on-page-4"],
+      );
+    });
+
+    it("Should read one page when that is all there is", async () => {
+      const { gren, requested } = createGren(1);
+
+      await gren._getAllCommitsForBranch("master");
+
+      assert.deepEqual(requested, [1]);
+    });
+  });
+});