diff --git a/selfdrive/test/process_replay/compare_logs.py b/selfdrive/test/process_replay/compare_logs.py
index 72f5e51bb2..9cf8e3fa9a 100755
--- a/selfdrive/test/process_replay/compare_logs.py
+++ b/selfdrive/test/process_replay/compare_logs.py
@@ -2,6 +2,7 @@
 import bz2
 import os
 import sys
+import math
 import numbers
 import dictdiffer
 from collections import Counter
@@ -82,10 +83,12 @@ def compare_logs(log1, log2, ignore_fields=None, ignore_msgs=None, tolerance=Non
       dd = dictdiffer.diff(msg1_dict, msg2_dict, ignore=ignore_fields)
 
       # Dictdiffer only supports relative tolerance, we also want to check for absolute
+      # TODO: add this to dictdiffer
       def outside_tolerance(diff):
         if diff[0] == "change":
           a, b = diff[2]
-          if isinstance(a, numbers.Number) and isinstance(b, numbers.Number):
+          finite = math.isfinite(a) and math.isfinite(b)
+          if finite and isinstance(a, numbers.Number) and isinstance(b, numbers.Number):
             return abs(a - b) > max(tolerance, tolerance * max(abs(a), abs(b)))
         return True