diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a852dcc..afdb74c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 jobs:
   ci-checks:
diff --git a/src/test/integration/node.test.ts b/src/test/integration/node.test.ts
index 304bfa3..9d8e6cf 100644
--- a/src/test/integration/node.test.ts
+++ b/src/test/integration/node.test.ts
@@ -93,6 +93,21 @@ describe("node", () => {
     }
   };
 
+  const createPullRequestForBranch = async (branch: string, title: string) => {
+    const pullRequest = await octokit.rest.pulls.create({
+      ...REPO,
+      title,
+      head: branch,
+      base: "main",
+      body: `CI-created integration test PR for \`${branch}\`.`,
+    });
+
+    expect(pullRequest.data.state).toEqual("open");
+    expect(pullRequest.data.head.ref).toEqual(branch);
+
+    return pullRequest.data.html_url;
+  };
+
   let testTargetCommit: string;
   /**
    * For tests, important that this commit is not an ancestor of TEST_TARGET_COMMIT,
@@ -263,6 +278,107 @@ describe("node", () => {
       });
     });
 
+    it("can create a commit using the REST git API", async () => {
+      const branch = `${TEST_BRANCH_PREFIX}-rest-git-${Date.now()}`;
+      const filePath = "rest-git-api-test.txt";
+
+      const baseRef = await octokit.rest.git.getRef({
+        ...REPO,
+        ref: "heads/main",
+      });
+      const baseOid = baseRef.data.object.sha;
+
+      const baseCommit = await octokit.rest.git.getCommit({
+        ...REPO,
+        commit_sha: baseOid,
+      });
+
+      const tree = await octokit.rest.git.createTree({
+        ...REPO,
+        base_tree: baseCommit.data.tree.sha,
+        tree: [
+          {
+            path: filePath,
+            mode: "100644",
+            type: "blob",
+            content: "Hello from the REST git API!\n",
+          },
+        ],
+      });
+
+      const commit = await octokit.rest.git.createCommit({
+        ...REPO,
+        message: "Test REST git commit",
+        tree: tree.data.sha,
+        parents: [baseOid],
+      });
+
+      await octokit.rest.git.createRef({
+        ...REPO,
+        ref: `refs/heads/${branch}`,
+        sha: commit.data.sha,
+      });
+
+      await waitForGitHubToBeReady();
+
+      const branchRef = await octokit.rest.git.getRef({
+        ...REPO,
+        ref: `heads/${branch}`,
+      });
+
+      expect(branchRef.data.object.sha).toEqual(commit.data.sha);
+
+      const pullRequestUrl = await createPullRequestForBranch(
+        branch,
+        `test: REST git API branch ${branch}`,
+      );
+
+      expect(pullRequestUrl).toContain(`/pull/`);
+    });
+
+    it("can create a commit using the GraphQL commit path", async () => {
+      const branch = `${TEST_BRANCH_PREFIX}-graphql-git-${Date.now()}`;
+      const filePath = "graphql-git-api-test.txt";
+
+      await commitFilesFromBuffers({
+        octokit,
+        ...REPO,
+        branch,
+        base: {
+          branch: "main",
+        },
+        message: {
+          headline: "Test GraphQL git commit",
+          body: "Created through commitFilesFromBuffers",
+        },
+        fileChanges: {
+          additions: [
+            {
+              path: filePath,
+              contents: Buffer.from("Hello from the GraphQL commit path!\n"),
+            },
+          ],
+        },
+        log,
+      });
+
+      await waitForGitHubToBeReady();
+
+      const branchRef = await octokit.rest.git.getRef({
+        ...REPO,
+        ref: `heads/${branch}`,
+      });
+
+      expect(branchRef.data.object.sha).toBeTruthy();
+
+      const pullRequestUrl = await createPullRequestForBranch(
+        branch,
+        `test: GraphQL commit path branch ${branch}`,
+      );
+
+      expect(pullRequestUrl).toContain(`/pull/`);
+    });
+
     describe("existing branches", () => {
       it("can commit to existing branch when force is true", async () => {
         const branch = `${TEST_BRANCH_PREFIX}-existing-branch-force`;