diff --git a/.zuul.yaml b/.zuul.yaml
index 10ba564b03..d04d6fc9c2 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,4 +1,10 @@
 ---
+- job:
+    name: fi-ansible--zuul-jobs-verify-namespace
+    run: ci/zuul-jobs-verify-namespace.yaml
+    files:
+      - ^\.zuul\.yaml$
+
 - job:
     name: fi-ansible--ansible-review-base
     pre-run: ci/ansible-review-base.yaml
@@ -16,4 +22,5 @@
 - project:
     check:
       jobs:
+        - fi-ansible--zuul-jobs-verify-namespace
         - fi-ansible--ansible-review-diff
diff --git a/ci/zuul-jobs-verify-namespace.py b/ci/zuul-jobs-verify-namespace.py
new file mode 100755
index 0000000000..ffd52bee0a
--- /dev/null
+++ b/ci/zuul-jobs-verify-namespace.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+
+import sys
+import traceback
+
+import yaml
+
+
+errors_found = False
+
+for zuul_yaml_file in sys.argv[1:]:
+    print(f"Processing {zuul_yaml_file!r}...", flush=True)
+    with open(zuul_yaml_file, "r") as yaml_stream:
+        for doc_no, yaml_doc in enumerate(yaml.safe_load_all(yaml_stream), 1):
+            print(f"Verifying YAML doc #{doc_no}...", flush=True)
+            yaml_doc_errors_found = False
+            try:
+                for item in yaml_doc:
+                    if "job" in item:
+                        job = item["job"]
+                        if not job["name"].startswith("fi-ansible--"):
+                            yaml_doc_errors_found = errors_found = True
+                            print(
+                                f"Locally defined Zuul job {job['name']!r} must be named"
+                                " 'fi-ansible-...'"
+                            )
+            except Exception:
+                yaml_doc_errors_found = errors_found = True
+                traceback.print_exc()
+
+            if yaml_doc_errors_found:
+                print(f"Verification failed.", flush=True)
+            else:
+                print(f"Verification passed.", flush=True)
+
+sys.exit(errors_found)
diff --git a/ci/zuul-jobs-verify-namespace.yaml b/ci/zuul-jobs-verify-namespace.yaml
new file mode 100644
index 0000000000..21483168de
--- /dev/null
+++ b/ci/zuul-jobs-verify-namespace.yaml
@@ -0,0 +1,19 @@
+- hosts: all
+  tasks:
+    - name: Install Python YAML package
+      package:
+        name: python3-pyyaml
+        state: latest
+
+    - name: Install invocation script
+      copy:
+        src: zuul-jobs-verify-namespace.py
+        dest: /usr/local/bin/zuul-jobs-verify-namespace.py
+        owner: root
+        group: root
+        mode: '0755'
+
+    - name: Verify that local Zuul jobs use our namespace
+      command: zuul-jobs-verify-namespace.py .zuul.yaml
+      args:
+        chdir: '{{ zuul.project.src_dir }}'