diff --git a/__test__/create-or-update-branch.int.test.ts b/__test__/create-or-update-branch.int.test.ts
index 5976eb5..a8fa489 100644
--- a/__test__/create-or-update-branch.int.test.ts
+++ b/__test__/create-or-update-branch.int.test.ts
@@ -230,6 +230,13 @@ describe('create-or-update-branch tests', () => {
     expect(workingBaseType).toEqual('commit')
   })
 
+  it('tests buildBranchFileChanges with no diff', async () => {
+    await git.checkout(BRANCH, BASE)
+    const branchFileChanges = await buildBranchFileChanges(git, BASE, BRANCH)
+    expect(branchFileChanges.additions.length).toEqual(0)
+    expect(branchFileChanges.deletions.length).toEqual(0)
+  })
+
   it('tests buildBranchFileChanges with addition and modification', async () => {
     await git.checkout(BRANCH, BASE)
     const changes = await createChanges()
diff --git a/dist/index.js b/dist/index.js
index fa37b56..b213f40 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -290,9 +290,8 @@ function createOrUpdateBranch(git, commitMessage, base, branch, branchRemoteName
             // Check if the pull request branch is ahead of the base
             result.hasDiffWithBase = yield isAhead(git, base, branch);
         }
-        if (result.hasDiffWithBase) {
-            result.branchFileChanges = yield buildBranchFileChanges(git, base, branch);
-        }
+        // Build the branch file changes
+        result.branchFileChanges = yield buildBranchFileChanges(git, base, branch);
         // Get the pull request branch SHA
         result.headSha = yield git.revParse('HEAD');
         // Delete the temporary branch
diff --git a/src/create-or-update-branch.ts b/src/create-or-update-branch.ts
index 72112bd..4d354b2 100644
--- a/src/create-or-update-branch.ts
+++ b/src/create-or-update-branch.ts
@@ -333,9 +333,8 @@ export async function createOrUpdateBranch(
     result.hasDiffWithBase = await isAhead(git, base, branch)
   }
 
-  if (result.hasDiffWithBase) {
-    result.branchFileChanges = await buildBranchFileChanges(git, base, branch)
-  }
+  // Build the branch file changes
+  result.branchFileChanges = await buildBranchFileChanges(git, base, branch)
 
   // Get the pull request branch SHA
   result.headSha = await git.revParse('HEAD')