diff --git a/collector/jq_collector/forge.py b/collector/jq_collector/forge.py
index 378d590..1c4316f 100644
--- a/collector/jq_collector/forge.py
+++ b/collector/jq_collector/forge.py
@@ -63,6 +63,15 @@ def normalise_gitlab_status(status: str) -> str:
     An unrecognised status becomes ``stale`` rather than ``failure``: GitLab has
     added states before and will again, and a new one appearing as a fleet-wide
     red is a worse failure mode than it appearing as "no verdict yet".
+
+    >>> normalise_gitlab_status("failed")
+    'failure'
+    >>> normalise_gitlab_status(" Canceled ")
+    'cancelled'
+    >>> normalise_gitlab_status("manual")
+    'cancelled'
+    >>> normalise_gitlab_status("some_future_state")
+    'stale'
     """
     return _GITLAB_STATUS.get((status or "").strip().lower(), "stale")
 
diff --git a/collector/jq_collector/origin.py b/collector/jq_collector/origin.py
index 80b2cce..983067c 100644
--- a/collector/jq_collector/origin.py
+++ b/collector/jq_collector/origin.py
@@ -58,6 +58,11 @@ def forge_for_host(host: str) -> str:
     exactly as they did before this module existed; a fleet on some other forge
     says so with an explicit ``forge:`` in repos.yml rather than relying on a
     guess from a hostname.
+
+    >>> forge_for_host("gitlab.com"), forge_for_host("gitlab.example.org")
+    ('gitlab', 'gitlab')
+    >>> forge_for_host("github.example.org"), forge_for_host("")
+    ('github', 'github')
     """
     host = host.lower()
     if host == "gitlab.com" or host.startswith("gitlab."):
@@ -70,6 +75,21 @@ def parse(url: str) -> Origin | None:
 
     Handles the four shapes a remote is written in: ``scheme://host/path``,
     the scp-like ``[user@]host:path``, and a bare absolute or relative path.
+
+    >>> parse("git@github.com:Jebel-Quant/monitoring.git")
+    Origin(host='github.com', namespace='Jebel-Quant', name='monitoring')
+
+    A GitLab namespace keeps every segment, not just the last one:
+
+    >>> parse("https://gitlab.com/acme/platform/infra/web.git").full_name
+    'acme/platform/infra/web'
+
+    A path remote has no host, so only its tail names the repo:
+
+    >>> parse("/srv/mirrors/o/r")
+    Origin(host='', namespace='o', name='r')
+    >>> parse("git@github.com:lonely") is None
+    True
     """
     url = url.strip().removesuffix(".git")
     if not url:
diff --git a/collector/pyproject.toml b/collector/pyproject.toml
index 73b5b8c..5fe2a10 100644
--- a/collector/pyproject.toml
+++ b/collector/pyproject.toml
@@ -20,10 +20,12 @@ packages = ["jq_collector"]
 dev = ["pytest>=8.0", "pytest-cov>=5.0", "ruff>=0.16"]
 
 [tool.pytest.ini_options]
-testpaths = ["tests"]
+# The package too, for its doctests: an example in a docstring is a claim,
+# and --doctest-modules is what keeps the claims true.
+testpaths = ["tests", "jq_collector"]
 # tests/ imports conftest helpers directly, so it needs to be on sys.path.
 pythonpath = ["tests"]
-addopts = "-q"
+addopts = "-q --doctest-modules"
 
 [tool.coverage.run]
 # The package, not the tests - measuring the tests inflates the figure with