diff --git a/devtools/data/gen-serialized-results.py b/devtools/data/gen-serialized-results.py
index d11d5730..ca7ff220 100644
--- a/devtools/data/gen-serialized-results.py
+++ b/devtools/data/gen-serialized-results.py
@@ -1,3 +1,14 @@
+"""
+Dev script to generate some result jsons that are used for testing
+
+Generates
+- AHFEProtocol_json_results.gz
+  - used in afe_solvation_json fixture
+- RHFEProtocol_json_results.gz
+  - used in rfe_transformation_json fixture
+- MDProtocol_json_results.gz
+  - used in md_json fixture
+"""
 import gzip
 import json
 import logging
@@ -60,7 +71,7 @@ def generate_md_json(smc):
     settings.simulation_settings.equilibration_length_nvt = 0.01 * unit.nanosecond
     settings.simulation_settings.equilibration_length = 0.01 * unit.nanosecond
     settings.simulation_settings.production_length = 0.01 * unit.nanosecond
-    settings.system_settings.nonbonded_method = "nocutoff"
+    settings.forcefield_settings.nonbonded_method = "nocutoff"
     protocol = PlainMDProtocol(settings=settings)
     system = openfe.ChemicalSystem({"ligand": smc})
     dag = protocol.create(stateA=system, stateB=system, mapping=None)
@@ -80,9 +91,11 @@ def generate_ahfe_json(smc):
     settings.lambda_settings.lambda_vdw = [0.0, 0.0, 0.0, 0.0, 0.0, 0.12, 0.24,
                                            0.36, 0.48, 0.6, 0.7, 0.77, 0.85,
                                            1.0]
-    settings.alchemsampler_settings.n_repeats = 3
-    settings.alchemsampler_settings.n_replicas = 14
-    settings.alchemsampler_settings.online_analysis_target_error = 0.2 * unit.boltzmann_constant * unit.kelvin
+    settings.protocol_repeats = 3
+    settings.solvent_simulation_settings.n_replicas = 14
+    settings.vacuum_simulation_settings.n_replicas = 14
+    settings.solvent_simulation_settings.early_termination_target_error = 0.12 * unit.kilocalorie_per_mole
+    settings.vacuum_simulation_settings.early_termination_target_error = 0.12 * unit.kilocalorie_per_mole
     settings.vacuum_engine_settings.compute_platform = 'CPU'
     settings.solvent_engine_settings.compute_platform = 'CUDA'
 
@@ -103,7 +116,7 @@ def generate_rfe_json(smcA, smcB):
     settings = RelativeHybridTopologyProtocol.default_settings()
     settings.simulation_settings.equilibration_length = 10 * unit.picosecond
     settings.simulation_settings.production_length = 250 * unit.picosecond
-    settings.system_settings.nonbonded_method = "nocutoff"
+    settings.forcefield_settings.nonbonded_method = "nocutoff"
     protocol = RelativeHybridTopologyProtocol(settings=settings)
 
     a_smcB = align_mol_shape(smcB, ref_mol=smcA)
diff --git a/openfe/tests/protocols/conftest.py b/openfe/tests/protocols/conftest.py
index fcaf13fb..67cc21d1 100644
--- a/openfe/tests/protocols/conftest.py
+++ b/openfe/tests/protocols/conftest.py
@@ -195,7 +195,10 @@ def toluene_many_solv_system(benzene_modifications):
 
 @pytest.fixture
 def rfe_transformation_json() -> str:
-    """string of a RFE results similar to quickrun"""
+    """string of a RFE results similar to quickrun
+
+    generated with gen-serialized-results.py
+    """
     d = resources.files('openfe.tests.data.openmm_rfe')
 
     with gzip.open((d / 'RHFEProtocol_json_results.gz').as_posix(), 'r') as f:  # type: ignore
@@ -206,6 +209,8 @@ def rfe_transformation_json() -> str:
 def afe_solv_transformation_json() -> str:
     """
     string of a Absolute Solvation result (CN in water) generated by quickrun
+
+    generated with gen-serialized-results.py
     """
     d = resources.files('openfe.tests.data.openmm_afe')
     fname = "AHFEProtocol_json_results.gz"
@@ -218,6 +223,8 @@ def afe_solv_transformation_json() -> str:
 def md_json() -> str:
     """
     string of a MD result (TYK ligand lig_ejm_31  in water) generated by quickrun
+
+    generated with gen-serialized-results.py
     """
     d = resources.files('openfe.tests.data.openmm_md')
     fname = "MDProtocol_json_results.gz"