diff --git a/rust-bindings/src/repo.rs b/rust-bindings/src/repo.rs
index 35a15248..5d34f98b 100644
--- a/rust-bindings/src/repo.rs
+++ b/rust-bindings/src/repo.rs
@@ -72,6 +72,12 @@ pub struct TransactionGuard<'a> {
 }
 
 impl<'a> TransactionGuard<'a> {
+    /// Returns a reference to the repository.
+    pub fn repo(&self) -> &Repo {
+        // SAFETY: This is only set to None in `commit`, which consumes self
+        self.repo.unwrap()
+    }
+
     /// Commit this transaction.
     pub fn commit<P: IsA<gio::Cancellable>>(
         mut self,
diff --git a/rust-bindings/tests/util/mod.rs b/rust-bindings/tests/util/mod.rs
index 472bf455..28cca926 100644
--- a/rust-bindings/tests/util/mod.rs
+++ b/rust-bindings/tests/util/mod.rs
@@ -67,7 +67,8 @@ pub fn commit(repo: &ostree::Repo, mtree: &ostree::MutableTree, ref_: &str) -> G
     let txn = repo
         .auto_transaction(NONE_CANCELLABLE)
         .expect("prepare transaction");
-    let repo_file = repo
+    let repo_file = txn
+        .repo()
         .write_mtree(mtree, NONE_CANCELLABLE)
         .expect("write mtree")
         .downcast::<ostree::RepoFile>()