diff --git a/Makefile b/Makefile
index cf94c63..05cb710 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,6 @@
 # Variables
+SOURCE_DIR = batdetect2
+TESTS_DIR = tests
 PYTHON_DIRS = batdetect2 tests
 DOCS_SOURCE = docs/source
 DOCS_BUILD = docs/build
@@ -52,7 +54,7 @@ docs:
 	sphinx-build -b html $(DOCS_SOURCE) $(DOCS_BUILD)
 
 docs-serve:
-	sphinx-autobuild $(DOCS_SOURCE) $(DOCS_BUILD) --watch $(PYTHON_DIRS)
+	sphinx-autobuild $(DOCS_SOURCE) $(DOCS_BUILD) --watch $(SOURCE_DIR) --open-browser
 
 # Formatting & Linting
 format:
diff --git a/pyproject.toml b/pyproject.toml
index 821720a..a10e16c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,6 +79,7 @@ dev-dependencies = [
   "sphinx-autodoc-typehints>=2.3.0",
   "sphinx-book-theme>=1.1.4",
   "autodoc-pydantic>=2.2.0",
+  "pytest-cov>=6.1.1",
 ]
 
 [tool.ruff]