diff --git a/tools/check_p23_life_observation_evidence.py b/tools/check_p23_life_observation_evidence.py
index 048ead2..9f80b39 100644
--- a/tools/check_p23_life_observation_evidence.py
+++ b/tools/check_p23_life_observation_evidence.py
@@ -1161,7 +1161,7 @@ def inspect_os_requests(directory, layout, role, pid, root=ROOT):
 
 def inspect_native_phases(directory, index, root=ROOT):
     runner = module('p23_existing_runner_checks', root/'tools/run_all_tests.py')
-    expected = ['runs/'+name+'/'+name+'-receipt.json' for name in ('import', 'parse', 'layout-A', 'layout-B')]
+    expected = ['runs/'+name+'/'+name+'-receipt.json' for name in ('import', 'parse', 'layout-a', 'layout-b')]
     require(index['phases'] == expected, 'native phase coverage/order')
     for name in expected:
         path = directory/name
diff --git a/tools/run_p23_life_observation.py b/tools/run_p23_life_observation.py
index fe5fc72..6592539 100644
--- a/tools/run_p23_life_observation.py
+++ b/tools/run_p23_life_observation.py
@@ -129,7 +129,7 @@ def collect_os(r, root, out, stage, engine, commit, refs, protected, outer):
         r.require(shutil.disk_usage(out).free >= 500*1024*1024, 'OS disk admission')
         folder = out/'os-runs'/label
         folder.mkdir(parents=True)
-        name = 'TheTree-PCK-tests-'+uuid.uuid4().hex+'-p23-observation-'+label
+        name = 'TheTree-PCK-tests-'+uuid.uuid4().hex+'-p23-observation-'+label.lower()
         profile = r.profile_path(name)
         r.require(not profile.exists(), 'fresh OS private profile')
         formal_source = pair/'formal' if role == 'reader' else None
@@ -306,7 +306,7 @@ def collect(args):
         for layout in ('A', 'B'):
             directory = out/('layout-'+layout)
             os.environ.update(P23_LAYOUT=layout, P23_OUTPUT=str(directory))
-            phase('layout-'+layout, 'tests/ui/test_p23_life_observation.gd')
+            phase('layout-'+layout.lower(), 'tests/ui/test_p23_life_observation.gd')
             cases.append({'directory':directory.name, 'phase':phases[-1], 'files':r.inventory(directory)})
         if args.input_mode == 'native_os':
             os_phases = collect_os(r, root, out, stage, engine, commit, refs, protected, outer)