diff --git a/.github/workflows/scripts/install.sh b/.github/workflows/scripts/install.sh
index 81126e22..b99832a0 100755
--- a/.github/workflows/scripts/install.sh
+++ b/.github/workflows/scripts/install.sh
@@ -79,7 +79,7 @@ cat >> vars/main.yaml << VARSYAML
 pulp_env: {}
 pulp_settings: null
 pulp_scheme: https
-pulp_default_container: ghcr.io/pulp/pulp-ci-centos:latest
+pulp_default_container: ghcr.io/pulp/pulp-ci-centos9:latest
 VARSYAML
 
 if [ "$TEST" = "s3" ]; then
diff --git a/CHANGES/366.bugfix b/CHANGES/366.bugfix
new file mode 100644
index 00000000..ac95bbc1
--- /dev/null
+++ b/CHANGES/366.bugfix
@@ -0,0 +1,2 @@
+Fixed an issue with `rpm-ostree` having multiples commits in the same tar file and breaking
+Pulp `import-commits`.
diff --git a/pulp_ostree/app/tasks/importing.py b/pulp_ostree/app/tasks/importing.py
index ad1ccc2d..cf8ea47b 100644
--- a/pulp_ostree/app/tasks/importing.py
+++ b/pulp_ostree/app/tasks/importing.py
@@ -139,6 +139,9 @@ async def load_next_commits(self, parent_commit, checksum, has_referenced_parent
 
         parent_checksum = OSTree.commit_get_parent(parent_commit)
 
+        # keep a reference to the parent's commit checksum
+        first_parent_checksum = parent_checksum
+
         while parent_checksum:
             commit = OstreeCommit(checksum=checksum, _pulp_domain=self.domain)
             commit_dc = self.create_dc(relative_path, commit)
@@ -172,6 +175,8 @@ async def load_next_commits(self, parent_commit, checksum, has_referenced_parent
 
         await self.submit_previous_commits_and_related_objects()
 
+        return first_parent_checksum, commit_dc
+
     async def copy_from_storage_to_tmp(self, parent_commit, objs):
         file_path = os.path.join(self.repo_path, parent_commit.relative_path)
         commit_file = await parent_commit._artifacts.aget()
diff --git a/pulp_ostree/tests/functional/api/test_import.py b/pulp_ostree/tests/functional/api/test_import.py
index 7e02086f..7a61cc69 100644
--- a/pulp_ostree/tests/functional/api/test_import.py
+++ b/pulp_ostree/tests/functional/api/test_import.py
@@ -276,3 +276,77 @@ def test_version_removal(
         )
         response.raise_for_status()
     assert exc.value.response.status_code == 404, repo_version2_href
+
+
+@pytest.mark.parallel
+def test_import_commits_same_ref(
+    artifacts_api_client,
+    gen_object_with_cleanup,
+    monitor_task,
+    ostree_repository_factory,
+    ostree_repositories_api_client,
+    ostree_repositories_versions_api_client,
+    tmp_path,
+):
+    """Import a repository with import-all, then import single commits with import-commits."""
+    os.chdir(tmp_path)
+    repo_name = "repo"
+    sample_dir = tmp_path / str(uuid.uuid4())
+    sample_file1 = sample_dir / str(uuid.uuid4())
+    sample_file2 = sample_dir / str(uuid.uuid4())
+    branch_name = "foo"
+
+    # 1. create a first file
+    sample_dir.mkdir()
+    sample_file1.touch()
+
+    # 2. initialize a local OSTree repository and commit the created file
+    subprocess.run(["ostree", f"--repo={repo_name}", "init", "--mode=archive"])
+    subprocess.run(
+        ["ostree", f"--repo={repo_name}", "commit", f"--branch={branch_name}", f"{sample_dir}/"]
+    )
+    subprocess.run(["tar", "-cvf", f"{repo_name}.tar", f"{repo_name}/"])
+
+    artifact = gen_object_with_cleanup(artifacts_api_client, f"{repo_name}.tar")
+    repo = ostree_repository_factory(name=repo_name)
+    commit_data = OstreeImportAll(artifact.pulp_href, repo_name)
+    response = ostree_repositories_api_client.import_all(repo.pulp_href, commit_data)
+    repo_version = monitor_task(response.task).created_resources[0]
+
+    repository_version = ostree_repositories_versions_api_client.read(repo_version)
+    added_content = repository_version.content_summary.added
+    assert added_content["ostree.config"]["count"] == 1
+    assert added_content["ostree.summary"]["count"] == 1
+    assert added_content["ostree.refs"]["count"] == 1
+    assert added_content["ostree.commit"]["count"] == 1
+
+    parent_commit = ""
+    with open(f"{repo_name}/refs/heads/{branch_name}", "r") as ref:
+        parent_commit = ref.read().strip()
+
+    # 3. commit a second file
+    sample_file2.touch()
+    subprocess.run(
+        [
+            "ostree",
+            f"--repo={repo_name}",
+            "commit",
+            f"--branch={branch_name}",
+            f"{sample_dir}/",
+            f"--parent={parent_commit}",
+        ]
+    )
+    subprocess.run(["tar", "-cvf", f"{repo_name}.tar", f"{repo_name}/"])
+
+    artifact = gen_object_with_cleanup(artifacts_api_client, f"{repo_name}.tar")
+
+    add_data = OstreeImportCommitsToRef(artifact.pulp_href, repo_name, branch_name)
+    response = ostree_repositories_api_client.import_commits(repo.pulp_href, add_data)
+    repo_version = monitor_task(response.task).created_resources[0]
+
+    repository_version = ostree_repositories_versions_api_client.read(repo_version)
+    added_content = repository_version.content_summary.added
+    assert added_content["ostree.refs"]["count"] == 1
+    assert added_content["ostree.commit"]["count"] == 1
+    assert added_content["ostree.content"]["count"] == 2
+    assert added_content["ostree.summary"]["count"] == 1
diff --git a/template_config.yml b/template_config.yml
index 4f4834be..88f8f108 100644
--- a/template_config.yml
+++ b/template_config.yml
@@ -9,7 +9,7 @@ check_commit_message: true
 check_gettext: true
 check_manifest: true
 check_stray_pulpcore_imports: true
-ci_base_image: ghcr.io/pulp/pulp-ci-centos
+ci_base_image: ghcr.io/pulp/pulp-ci-centos9
 ci_env: {}
 ci_trigger: '{pull_request: {branches: [''*'']}}'
 ci_update_docs: true