diff --git a/PySDM/physics/constants_defaults.py b/PySDM/physics/constants_defaults.py
index 39d89938dc..5df49310b9 100644
--- a/PySDM/physics/constants_defaults.py
+++ b/PySDM/physics/constants_defaults.py
@@ -295,7 +295,7 @@
 p_STP = 101325 * si.pascal
 """ ... and pressure """
 
-ROOM_TEMP = T_tri + 25 * si.K
+ROOM_TEMP = T0 + 25 * si.K
 """ room temperature """
 
 dT_u = si.K
diff --git a/tests/unit_tests/backends/test_oxidation.py b/tests/unit_tests/backends/test_oxidation.py
index 747040eba7..5ed2534b6c 100644
--- a/tests/unit_tests/backends/test_oxidation.py
+++ b/tests/unit_tests/backends/test_oxidation.py
@@ -181,5 +181,5 @@ def test_oxidation(conc, dt):
         np.testing.assert_allclose(
             actual=moles[k].data / volume - conc["input"][k],
             desired=conc["output"][k] * dt,
-            rtol=1e-11,
+            rtol=1e-10,
         )