diff --git a/selfdrive/car/fw_versions.py b/selfdrive/car/fw_versions.py
index ca75ed62e5..23e3e9870a 100755
--- a/selfdrive/car/fw_versions.py
+++ b/selfdrive/car/fw_versions.py
@@ -75,7 +75,7 @@ def match_fw_to_car_fuzzy(fw_versions_dict, log=True, exclude=None):
       for f in fws:
         all_fw_versions[(addr[1], addr[2], f)].append(candidate)
 
-  matched_ecus = set()
+  matched_ecus = list()
   candidate = None
   for addr, versions in fw_versions_dict.items():
     ecu_key = (addr[0], addr[1])
@@ -84,7 +84,7 @@ def match_fw_to_car_fuzzy(fw_versions_dict, log=True, exclude=None):
       candidates = all_fw_versions[(*ecu_key, version)]
 
       if len(candidates) == 1:
-        matched_ecus.add(ecu_key)
+        matched_ecus.append(ecu_key)
         if candidate is None:
           candidate = candidates[0]
         # We uniquely matched two different cars. No fuzzy match possible
diff --git a/selfdrive/car/tests/test_fw_fingerprint.py b/selfdrive/car/tests/test_fw_fingerprint.py
index 2eef7e4c24..144f743850 100755
--- a/selfdrive/car/tests/test_fw_fingerprint.py
+++ b/selfdrive/car/tests/test_fw_fingerprint.py
@@ -51,21 +51,24 @@ class TestFwFingerprint(unittest.TestCase):
   def test_fuzzy_match(self, brand, car_model, ecus):
     # TODO: speed up fuzzy matching and test more
     CP = car.CarParams.new_message()
+    # if car_model != "HYUNDAI IONIQ ELECTRIC LIMITED 2019":
+    #   raise unittest.SkipTest
     for _ in range(1):
       fw = []
       for ecu, fw_versions in ecus.items():
         if not len(fw_versions):
           raise unittest.SkipTest("Car model has no FW versions")
         ecu_name, addr, sub_addr = ecu
-        fw.append({"ecu": ecu_name, "fwVersion": random.choice(fw_versions), 'brand': brand,
-                   "address": addr, "subAddress": 0 if sub_addr is None else sub_addr})
+        fw.extend([{"ecu": ecu_name, "fwVersion": random.choice(fw_versions), 'brand': brand,
+                   "address": addr, "subAddress": 0 if sub_addr is None else sub_addr}]*2)
       CP.carFw = fw
       _, matches = match_fw_to_car(CP.carFw, allow_exact=False, log=False)
 
       # Assert no match if there are not enough valid ECUs
       valid_ecus = [(f['address'], f['subAddress']) for f in fw if f['ecu'] not in FUZZY_EXCLUDE_ECUS]
+      print(valid_ecus, matches)
       if len(set(valid_ecus)) < 2:
-        self.assertEqual(len(matches), 0)
+        self.assertEqual(len(matches), 0, valid_ecus)
       # There won't always be a match due to shared FW, but if there is it should be correct
       elif len(matches):
         self.assertFingerprints(matches, car_model)