diff --git a/packages/source-control-gitlab/src/shared/definition.test.ts b/packages/source-control-gitlab/src/shared/definition.test.ts
index 9cd95fadfafcc..a67cfeda25cd8 100644
--- a/packages/source-control-gitlab/src/shared/definition.test.ts
+++ b/packages/source-control-gitlab/src/shared/definition.test.ts
@@ -100,6 +100,15 @@ describe("GitLab change request URLs", () => {
   });
 });
 
+describe("GitLab CLI commands", () => {
+  it("recognizes shell merges and closes, including glab's `accept` alias", () => {
+    for (const command of ["glab mr merge 7 --yes", "glab mr accept 7 --yes", "glab mr close 7"]) {
+      expect(definition.changeRequestCloseCommand.test(command), command).toBe(true);
+    }
+    expect(definition.changeRequestCloseCommand.test("glab mr view 7")).toBe(false);
+  });
+});
+
 describe("GitLab remotes", () => {
   const recognize = (url: string) => recognizeRemoteWith(definition, url);
 
diff --git a/packages/source-control-gitlab/src/shared/definition.ts b/packages/source-control-gitlab/src/shared/definition.ts
index 2ec891cae34b8..16d5bb8cf0efa 100644
--- a/packages/source-control-gitlab/src/shared/definition.ts
+++ b/packages/source-control-gitlab/src/shared/definition.ts
@@ -62,7 +62,8 @@ export const definition = defineSourceControl({
     "delete-branch",
   ] as const),
   checkoutCommand: ({ number }) => `glab mr checkout ${number}`,
-  changeRequestCloseCommand: /\bglab\s+mr\s+(?:merge|close)\b/u,
+  // `accept` is glab's alias for `merge`.
+  changeRequestCloseCommand: /\bglab\s+mr\s+(?:merge|accept|close)\b/u,
   changeRequestCreateCommand: /\bglab\s+mr\s+create\b/u,
   // Bot users, unlike GitHub's, have real profile pages.
   authorProfileUrl: (login, repositoryUrl) =>