diff --git a/bert_e/tests/unit/test_handle_pull_request.py b/bert_e/tests/unit/test_handle_pull_request.py
new file mode 100644
index 00000000..fd6b8d32
--- /dev/null
+++ b/bert_e/tests/unit/test_handle_pull_request.py
@@ -0,0 +1,57 @@
+"""Unit tests for gitwaterflow.handle_pull_request routing."""
+from types import SimpleNamespace
+from unittest.mock import patch
+
+from bert_e.workflow.gitwaterflow import handle_pull_request
+
+
+class _FakeRepo:
+    def __init__(self):
+        self._url = ''
+        self._remote_branches = {}
+
+
+def _make_job(author, src_branch):
+    """Return a minimal PullRequestJob stub."""
+    pull_request = SimpleNamespace(
+        author=author,
+        src_branch=src_branch,
+        id=5171,
+    )
+    settings = SimpleNamespace(robot=author)
+    bert_e = SimpleNamespace(settings=settings)
+    git = SimpleNamespace(cascade=None, repo=_FakeRepo())
+    return SimpleNamespace(
+        pull_request=pull_request,
+        settings=settings,
+        bert_e=bert_e,
+        git=git,
+    )
+
+
+def test_robot_authored_integration_branch_routes_to_parent():
+    """Robot PR on w/... branch routes to handle_parent_pull_request."""
+    job = _make_job(author='bert-e',
+                    src_branch='w/4.2/improvement/ARTESCA-17563-something')
+
+    parent_path = 'bert_e.workflow.gitwaterflow.handle_parent_pull_request'
+    handle_path = 'bert_e.workflow.gitwaterflow._handle_pull_request'
+    with patch(parent_path) as mock_parent, patch(handle_path) as mock_handle:
+        handle_pull_request(job)
+        mock_parent.assert_called_once_with(job, job.pull_request)
+        mock_handle.assert_not_called()
+
+
+def test_robot_authored_feature_branch_does_not_route_to_parent():
+    """Robot PR on feature/... branch (CID bump) is not an integration PR."""
+    job = _make_job(
+        author='bert-e',
+        src_branch='feature/ARTESCA-17576-bump-identity-ui-0.41.0',
+    )
+
+    parent_path = 'bert_e.workflow.gitwaterflow.handle_parent_pull_request'
+    handle_path = 'bert_e.workflow.gitwaterflow._handle_pull_request'
+    with patch(parent_path) as mock_parent, patch(handle_path) as mock_handle:
+        handle_pull_request(job)
+        mock_parent.assert_not_called()
+        mock_handle.assert_called_once_with(job)
diff --git a/bert_e/workflow/gitwaterflow/__init__.py b/bert_e/workflow/gitwaterflow/__init__.py
index 33fcf69b..f875c379 100644
--- a/bert_e/workflow/gitwaterflow/__init__.py
+++ b/bert_e/workflow/gitwaterflow/__init__.py
@@ -50,7 +50,8 @@
 @handler(PullRequestJob)
 def handle_pull_request(job: PullRequestJob):
     """Analyse and handle a pull request that has just been updated."""
-    if job.pull_request.author == job.settings.robot:
+    if job.pull_request.author == job.settings.robot and re.match(
+            IntegrationBranch.pattern, job.pull_request.src_branch):
         return handle_parent_pull_request(job, job.pull_request)
     try:
         _handle_pull_request(job)