diff --git a/tools/lib/route.py b/tools/lib/route.py
index 529e42e8e6..471fa2226f 100644
--- a/tools/lib/route.py
+++ b/tools/lib/route.py
@@ -4,7 +4,7 @@ from functools import cache
 from urllib.parse import urlparse
 from collections import defaultdict
 from itertools import chain
-from typing import Optional
+from typing import Optional, cast
 
 from openpilot.tools.lib.auth_config import get_token
 from openpilot.tools.lib.api import CommaApi
@@ -237,44 +237,45 @@ class SegmentName:
 
 
 @cache
-def get_max_seg_number_cached(sr: 'SegmentRange'):
+def get_max_seg_number_cached(sr: 'SegmentRange') -> int:
   try:
     api = CommaApi(get_token())
-    return api.get("/v1/route/" + sr.route_name.replace("/", "|"))["segment_numbers"][-1]
+    return cast(int, api.get("/v1/route/" + sr.route_name.replace("/", "|"))["segment_numbers"][-1])
   except Exception as e:
     raise Exception("unable to get max_segment_number. ensure you have access to this route or the route is public.") from e
 
 
 class SegmentRange:
   def __init__(self, segment_range: str):
-    self.m = re.fullmatch(RE.SEGMENT_RANGE, segment_range)
-    assert self.m, f"Segment range is not valid {segment_range}"
+    m = re.fullmatch(RE.SEGMENT_RANGE, segment_range)
+    assert m is not None, f"Segment range is not valid {segment_range}"
+    self.m = m
 
   def get_max_seg_number(self):
     return get_max_seg_number_cached(self)
 
   @property
-  def route_name(self):
+  def route_name(self) -> str:
     return self.m.group("route_name")
 
   @property
-  def dongle_id(self):
+  def dongle_id(self) -> str:
     return self.m.group("dongle_id")
 
   @property
-  def timestamp(self):
+  def timestamp(self) -> str:
     return self.m.group("timestamp")
 
   @property
-  def _slice(self):
+  def _slice(self) -> str:
     return self.m.group("slice")
 
   @property
-  def selector(self):
+  def selector(self) -> str:
     return self.m.group("selector")
 
-  def __str__(self):
+  def __str__(self) -> str:
     return f"{self.dongle_id}/{self.timestamp}" + (f"/{self._slice}" if self._slice else "") + (f"/{self.selector}" if self.selector else "")
 
-  def __repr__(self):
+  def __repr__(self) -> str:
     return self.__str__()
diff --git a/tools/lib/tests/test_logreader.py b/tools/lib/tests/test_logreader.py
index 5131835017..c21c94342c 100644
--- a/tools/lib/tests/test_logreader.py
+++ b/tools/lib/tests/test_logreader.py
@@ -1,6 +1,5 @@
 import shutil
 import tempfile
-import numpy as np
 import os
 import unittest
 import pytest
@@ -13,7 +12,7 @@ from openpilot.tools.lib.logreader import LogIterable, LogReader, comma_api_sour
 from openpilot.tools.lib.route import SegmentRange
 
 NUM_SEGS = 17  # number of segments in the test route
-ALL_SEGS = list(np.arange(NUM_SEGS))
+ALL_SEGS = list(range(NUM_SEGS))
 TEST_ROUTE = "344c5c15b34f2d8a/2024-01-03--09-37-12"
 QLOG_FILE = "https://commadataci.blob.core.windows.net/openpilotci/0375fdf7b1ce594d/2019-06-13--08-32-25/3/qlog.bz2"