diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c75c88e92b..3ce498b750 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -89,7 +89,7 @@ jobs:
         uses: ./.github/setup_python
 
       - name: Run linter
-        run: pylint evap -j 0
+        run: pylint evap tools -j 0
 
 
   formatter:
diff --git a/evap/evaluation/management/commands/lint.py b/evap/evaluation/management/commands/lint.py
index b7c4427abb..767637d61f 100644
--- a/evap/evaluation/management/commands/lint.py
+++ b/evap/evaluation/management/commands/lint.py
@@ -9,4 +9,4 @@ class Command(BaseCommand):
     requires_migrations_checks = False
 
     def handle(self, *args, **options):
-        subprocess.run(["pylint", "evap"], check=False)  # nosec
+        subprocess.run(["pylint", "evap", "tools"], check=False)  # nosec
diff --git a/tools/enrollment_preprocessor.py b/tools/enrollment_preprocessor.py
index 3fabddec48..84993009f5 100755
--- a/tools/enrollment_preprocessor.py
+++ b/tools/enrollment_preprocessor.py
@@ -4,7 +4,7 @@
 from argparse import ArgumentParser
 from dataclasses import dataclass
 from io import BytesIO
-from typing import Iterator, TextIO
+from typing import TextIO
 
 from openpyxl import load_workbook
 from openpyxl.cell import Cell