diff --git a/opendbc/car/tests/test_car_interfaces.py b/opendbc/car/tests/test_car_interfaces.py
index a329ee3b6b2..1945bb5a291 100644
--- a/opendbc/car/tests/test_car_interfaces.py
+++ b/opendbc/car/tests/test_car_interfaces.py
@@ -2,6 +2,7 @@
 import math
 import hypothesis.strategies as st
 import pytest
+from functools import cache
 from hypothesis import Phase, given, settings
 from collections.abc import Callable
 from typing import Any
@@ -27,7 +28,8 @@
 MAX_EXAMPLES = int(os.environ.get('MAX_EXAMPLES', '15'))
 
 
-def get_fuzzy_car_interface(car_name: str, draw: DrawType) -> CarInterfaceBase:
+@cache
+def get_fuzzy_strategy():
   # Fuzzy CAN fingerprints and FW versions to test more states of the CarInterface
   fingerprint_strategy = st.fixed_dictionaries({0: st.dictionaries(st.integers(min_value=0, max_value=0x800),
                                                                    st.sampled_from(DLC_TO_LEN))})
@@ -44,8 +46,11 @@ def get_fuzzy_car_interface(car_name: str, draw: DrawType) -> CarInterfaceBase:
     'car_fw': car_fw_strategy,
     'alpha_long': st.booleans(),
   })
+  return params_strategy
+
 
-  params: dict = draw(params_strategy)
+def get_fuzzy_car_interface(car_name: str, draw: DrawType) -> CarInterfaceBase:
+  params: dict = draw(get_fuzzy_strategy())
   # reduce search space by duplicating CAN fingerprints across all buses
   params['fingerprints'] |= {key + 1: params['fingerprints'][0] for key in range(6)}