diff --git a/.circleci/config.yml b/.circleci/config.yml
index e89a8abe..85dfc97c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -19,7 +19,7 @@ jobs:
       - run: python --version ; pip --version ; pwd ; ls -l
       - run: pip install black codespell ruff
       - run: codespell -L queenland,uint,assertin
-      - run: ruff .
+      - run: ruff check
       - run: black . --check
 
 
diff --git a/new_units.py b/new_units.py
index 86d82ee5..26ffa133 100644
--- a/new_units.py
+++ b/new_units.py
@@ -9,7 +9,7 @@
 import sys
 
 UNIT_LOOKUP = dict()
-for entry in pkgutil.get_data("sc2reader.data", "unit_lookup.csv").split("\n"):
+for entry in pkgutil.get_data("sc2reader.data", "unit_lookup.csv").splitlines():
     if not entry:
         continue
     str_id, title = entry.strip().split(",")
@@ -25,7 +25,7 @@
 print("")
 
 ABIL_LOOKUP = dict()
-for entry in pkgutil.get_data("sc2reader.data", "ability_lookup.csv").split("\n"):
+for entry in pkgutil.get_data("sc2reader.data", "ability_lookup.csv").splitlines():
     if not entry:
         continue
     str_id, abilities = entry.split(",", 1)
diff --git a/sc2reader/data/__init__.py b/sc2reader/data/__init__.py
index ccd6455c..10598e02 100755
--- a/sc2reader/data/__init__.py
+++ b/sc2reader/data/__init__.py
@@ -15,7 +15,7 @@
 
 ABIL_LOOKUP = dict()
 for entry in (
-    pkgutil.get_data("sc2reader.data", "ability_lookup.csv").decode("utf8").split("\n")
+    pkgutil.get_data("sc2reader.data", "ability_lookup.csv").decode("utf8").splitlines()
 ):
     if not entry:
         continue
@@ -24,7 +24,7 @@
 
 UNIT_LOOKUP = dict()
 for entry in (
-    pkgutil.get_data("sc2reader.data", "unit_lookup.csv").decode("utf8").split("\n")
+    pkgutil.get_data("sc2reader.data", "unit_lookup.csv").decode("utf8").splitlines()
 ):
     if not entry:
         continue
@@ -401,7 +401,7 @@ def load_build(expansion, version):
 
     unit_file = f"{expansion}/{version}_units.csv"
     for entry in (
-        pkgutil.get_data("sc2reader.data", unit_file).decode("utf8").split("\n")
+        pkgutil.get_data("sc2reader.data", unit_file).decode("utf8").splitlines()
     ):
         if not entry:
             continue
@@ -421,7 +421,7 @@ def load_build(expansion, version):
     abil_file = f"{expansion}/{version}_abilities.csv"
     build.add_ability(ability_id=0, name="RightClick", title="Right Click")
     for entry in (
-        pkgutil.get_data("sc2reader.data", abil_file).decode("utf8").split("\n")
+        pkgutil.get_data("sc2reader.data", abil_file).decode("utf8").splitlines()
     ):
         if not entry:
             continue
diff --git a/sc2reader/objects.py b/sc2reader/objects.py
index 9ee978e7..10dbc755 100644
--- a/sc2reader/objects.py
+++ b/sc2reader/objects.py
@@ -48,7 +48,7 @@ def lineup(self):
         return "".join(sorted(p.play_race[0].upper() for p in self.players))
 
     @property
-    def hash(self):
+    def hash(self):  # noqa: F811
         raw_hash = ",".join(sorted(p.url for p in self.players))
         return hashlib.sha256(raw_hash).hexdigest()