Fix testing dependencies

Author: MattyTheHacker

pyproject.toml

@@ -21,7 +21,11 @@ main = [
     "validators>=0.34",
 ]
 pre-commit = ["pre-commit>=4.0"]
-test = ["pytest>=8.3"]
+test = [
+    "gitpython>=3.1.44",
+    "pytest>=8.3",
+    "pytest-cov>=6.1.1",
+]
 type-check = ["django-stubs[compatible-mypy]>=5.1", "mypy>=1.13", "types-beautifulsoup4>=4.12"]
 
 [project] # TODO: Remove [project] table once https://github.com/astral-sh/uv/issues/8582 is completed