diff --git a/CHANGES/+pulp-attestation-sync.bugfix b/CHANGES/+pulp-attestation-sync.bugfix
new file mode 100644
index 000000000..b61e1661c
--- /dev/null
+++ b/CHANGES/+pulp-attestation-sync.bugfix
@@ -0,0 +1 @@
+Fixed provenance sync failing when syncing Pulp-created attestations that use a `Pulp User` publisher.
diff --git a/pulp_python/app/tasks/sync.py b/pulp_python/app/tasks/sync.py
index ee957da98..a4dc874e9 100644
--- a/pulp_python/app/tasks/sync.py
+++ b/pulp_python/app/tasks/sync.py
@@ -10,7 +10,6 @@
 from bandersnatch.mirror import Mirror
 from lxml.etree import LxmlError
 from packaging.requirements import Requirement
-from pypi_attestations import Provenance
 from pypi_simple import IndexPage
 from rest_framework import serializers
 
@@ -28,6 +27,7 @@
     PythonPackageContent,
     PythonRemote,
 )
+from pulp_python.app.provenance import Provenance
 from pulp_python.app.utils import PYPI_LAST_SERIAL, aget_remote_simple_page, parse_metadata
 
 logger = logging.getLogger(__name__)
diff --git a/pulp_python/tests/functional/api/test_attestations.py b/pulp_python/tests/functional/api/test_attestations.py
index 0737256b7..6a8ac9d95 100644
--- a/pulp_python/tests/functional/api/test_attestations.py
+++ b/pulp_python/tests/functional/api/test_attestations.py
@@ -154,6 +154,54 @@ def test_attestation_sync_upload(python_bindings, twine_package, download_python
     assert att_bundle["publisher"]["kind"] == "Pulp User"
 
 
+@pytest.mark.parallel
+def test_sync_pulp_created_provenance(
+    domain_factory,
+    python_bindings,
+    twine_package,
+    python_repo_factory,
+    python_distribution_factory,
+    python_remote_factory,
+    python_repo_with_sync,
+    python_content_summary,
+    monitor_task,
+):
+    """Test syncing provenance across domains from a Pulp upload."""
+    source_domain = domain_factory()
+    attestations = get_attestations(twine_package.provenance_url)
+    source_repo = python_repo_factory(pulp_domain=source_domain.name)
+    body = {
+        "relative_path": twine_package.filename,
+        "file_url": twine_package.url,
+        "attestations": json.dumps(attestations),
+        "repository": source_repo.pulp_href,
+    }
+    task = python_bindings.ContentPackagesApi.create(pulp_domain=source_domain.name, **body).task
+    monitor_task(task)
+
+    source_distro = python_distribution_factory(
+        repository=source_repo, pulp_domain=source_domain.name
+    )
+    dest_domain = domain_factory()
+    remote = python_remote_factory(
+        url=source_distro.base_url,
+        provenance=True,
+        includes=[f"twine=={twine_package.version}"],
+        pulp_domain=dest_domain.name,
+    )
+    dest_repo = python_repo_with_sync(remote=remote, pulp_domain=dest_domain.name)
+
+    summary = python_content_summary(repository_version=dest_repo.latest_version_href)
+    assert summary.present["python.provenance"]["count"] == 1
+
+    provs = python_bindings.ContentProvenanceApi.list(
+        repository_version=dest_repo.latest_version_href,
+        pulp_domain=dest_domain.name,
+    )
+    assert provs.count == 1
+    assert provs.results[0].provenance["attestation_bundles"][0]["publisher"]["kind"] == "Pulp User"
+
+
 def test_attestation_twine_upload(
     pulpcore_bindings,
     python_content_summary,
diff --git a/pulp_python/tests/functional/api/test_pypi_apis.py b/pulp_python/tests/functional/api/test_pypi_apis.py
index 48a3179d2..37c94c402 100644
--- a/pulp_python/tests/functional/api/test_pypi_apis.py
+++ b/pulp_python/tests/functional/api/test_pypi_apis.py
@@ -245,8 +245,9 @@ def test_simple_redirect_with_publications(
     assert response.url == str(urljoin(pulp_content_url, f"{distro.base_path}/simple/"))
 
 
-@pytest.mark.parallel
-def test_pypi_json(python_remote_factory, python_repo_with_sync, python_distribution_factory):
+def test_pypi_json(
+    delete_orphans_pre, python_remote_factory, python_repo_with_sync, python_distribution_factory
+):
     """Checks the data of `pypi/{package_name}/json` endpoint."""
     remote = python_remote_factory(policy="immediate")
     repo = python_repo_with_sync(remote)
@@ -260,8 +261,8 @@ def test_pypi_json(python_remote_factory, python_repo_with_sync, python_distribu
     assert_pypi_json(response.json())
 
 
-@pytest.mark.parallel
 def test_pypi_json_content_app(
+    delete_orphans_pre,
     python_remote_factory,
     python_repo_with_sync,
     python_publication_factory,