diff --git a/.github/workflows/engine_pr_test.yml b/.github/workflows/engine_pr_test.yml
index 5fe1b2062bc5..019390e74b7f 100644
--- a/.github/workflows/engine_pr_test.yml
+++ b/.github/workflows/engine_pr_test.yml
@@ -43,7 +43,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-24.04]
-        python-version: ["3.11"]
+        python-version: ["3.12"]
     env:
       GITHUB_HEAD_REF: ${{ github.head_ref }}
       FROM_FORK: ${{ github.event.pull_request.head.repo.fork }}
diff --git a/openquake/commonlib/readinput.py b/openquake/commonlib/readinput.py
index 75047560b9c9..f0d47ef4d940 100644
--- a/openquake/commonlib/readinput.py
+++ b/openquake/commonlib/readinput.py
@@ -1262,8 +1262,8 @@ def _taxonomy_mapping(filename, taxidx):
     if 'conversion' in tmap_df.columns:
         # conversion was the old name in the header for engine <= 3.12
         tmap_df = tmap_df.rename(columns={'conversion': 'risk_id'})
-    assert set(tmap_df) == {'country', 'loss_type', 'taxonomy', 'risk_id', 'weight'}
-
+    assert set(tmap_df) == {'country', 'loss_type', 'taxonomy', 'risk_id', 'weight'
+                            }, set(tmap_df)
     taxos = set()
     for (taxo, lt), df in tmap_df.groupby(['taxonomy', 'loss_type']):
         taxos.add(taxo)
diff --git a/openquake/hazardlib/tests/pmf_test.py b/openquake/hazardlib/tests/pmf_test.py
index d2f527fca4da..899f470363fd 100644
--- a/openquake/hazardlib/tests/pmf_test.py
+++ b/openquake/hazardlib/tests/pmf_test.py
@@ -24,8 +24,8 @@ def test_creation(self):
         self.assertEqual(pmf.data, [(0.1, i) for i in range(10)])
 
     def test_wrong_sum(self):
-        data = [(0.1, i) for i in range(10)]
-        self.assertRaises(ValueError, PMF, data, 1E-16)
+        data = [(0.100001, i) for i in range(10)]
+        self.assertRaises(ValueError, PMF, data, 1E-10)
 
     def test_empty_data(self):
         self.assertRaises(ValueError, PMF, [])