diff --git a/README.md b/README.md
index 7f00cf7..7892103 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ pip install .
 
 `./main.py -sc <int>` -- Plays sound file located in `/assets/sound/move.mp3` whenever green light signal is detected via camera.
 
+### Tip
 Replace `<int>` with your camera number specified by the operating system. Probably `0` or `1`, but can be higher.
 
 ## To Do
diff --git a/pyproject.toml b/pyproject.toml
index ef66097..7e1be6d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ requires = ["setuptools>=42.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.pytest.ini_options]
-addops = "--cov=TrafficLightDetector"
+addopts = "--cov=TrafficLightDetector"
 testpaths = ["tests"]
 
 [tool.mypy]