diff --git a/benchmarks/transport_montecarlo_numba_formal_integral_p.py b/benchmarks/transport_montecarlo_numba_formal_integral_p.py
index bea0d65d167..0e084505404 100644
--- a/benchmarks/transport_montecarlo_numba_formal_integral_p.py
+++ b/benchmarks/transport_montecarlo_numba_formal_integral_p.py
@@ -77,6 +77,8 @@ def formal_integral_geometry(self, r):
 
     @property
     def time_explosion(self):
+        # previously used model value that passes tests
+        # time taken for a photon to move 1 cm
         return 1 / c.c.cgs.value
 
     @parameterize({"p": [0.0, 0.5, 1.0], "Test data": TESTDATA})
diff --git a/tardis/transport/montecarlo/montecarlo_main_loop.py b/tardis/transport/montecarlo/montecarlo_main_loop.py
index cfd4d213d7a..e0292ab3e72 100644
--- a/tardis/transport/montecarlo/montecarlo_main_loop.py
+++ b/tardis/transport/montecarlo/montecarlo_main_loop.py
@@ -47,6 +47,7 @@ def montecarlo_main_loop(
     geometry_state : GeometryState
         Simulation geometry
     time_explosion : float
+        Time in seconds
     opacity_state : OpacityState
     estimators : Estimators
     spectrum_frequency :  astropy.units.Quantity
diff --git a/tardis/transport/montecarlo/tests/test_cuda_formal_integral.py b/tardis/transport/montecarlo/tests/test_cuda_formal_integral.py
index 69d50825864..0a5b2f9a097 100644
--- a/tardis/transport/montecarlo/tests/test_cuda_formal_integral.py
+++ b/tardis/transport/montecarlo/tests/test_cuda_formal_integral.py
@@ -123,6 +123,8 @@ def time_explosion():
     """
     This gets the time_explosion to be used in later tests
     """
+    # previously used model value that passes tests
+        # time taken for a photon to move 1 cm
     return 1 / c.c.cgs.value