diff --git a/PythonModels/systems/test_mql_pneumatic.py b/PythonModels/systems/test_mql_pneumatic.py
index 2410337..208507c 100644
--- a/PythonModels/systems/test_mql_pneumatic.py
+++ b/PythonModels/systems/test_mql_pneumatic.py
@@ -16,8 +16,8 @@ AMESIM_REFERENCE_PRESSURE_PA = 101_300.0
 BAR_TO_PA = 1.0e5
 DEFAULT_TEST_MQL_TEMPERATURE_K = 293.15
 DEFAULT_VARIABLE_CHAMBER_PRESSURE_BAR = 1.0
-# Matched to PNVO001 event-window cm_ratio near the 0.04 s opening event.
-TEST_MQL_PNVO001_FLOW_COEFFICIENT_MULTIPLIER = 0.9926
+# Matched to PNVO001 event-window mass flow near the 0.04 s opening event.
+TEST_MQL_PNVO001_FLOW_COEFFICIENT_MULTIPLIER = 0.99805
 
 
 @dataclass(frozen=True)