diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..397b4a7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.log
diff --git a/tests/run_tests.py b/tests/run_tests.py
index a73d16e..7987eb1 100644
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -7,7 +7,9 @@ import tempfile
 from pathlib import Path
 
 parser = argparse.ArgumentParser(description="Process some integers.")
-parser.add_argument("src", default="src", type=Path, help="src directory", nargs="?")
+parser.add_argument(
+    "src", default="src", type=Path, help="src directory", nargs="?"
+)
 parser.add_argument(
     "tests", default="tests", type=Path, help="tests directory", nargs="?"
 )