diff --git a/pyproject.toml b/pyproject.toml
index 1cf84312..cbe7642e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,6 +49,7 @@ typogrify = "^2.0"
 sphinx = "^3.0"
 sphinx_rtd_theme = "^0.5"
 livereload = "^2.6"
+psutil = {version = "^5.7", optional = true}
 pytest = "^6.0"
 pytest-cov = "^2.8"
 pytest-pythonpath = "^0.7.3"
diff --git a/requirements/test.pip b/requirements/test.pip
index 647a8694..d36405f0 100644
--- a/requirements/test.pip
+++ b/requirements/test.pip
@@ -2,7 +2,7 @@
 Pygments==2.6.1
 pytest
 pytest-cov
-pytest-xdist
+pytest-xdist[psutil]
 
 # Optional Packages
 Markdown >= 3.1
diff --git a/tasks.py b/tasks.py
index 76c48834..171a9711 100644
--- a/tasks.py
+++ b/tasks.py
@@ -14,7 +14,7 @@ VENV_PATH = Path(ACTIVE_VENV) if ACTIVE_VENV else (VENV_HOME / PKG_NAME)
 VENV = str(VENV_PATH.expanduser())
 VENV_BIN = Path(VENV) / Path(BIN_DIR)
 
-TOOLS = ["poetry", "pre-commit"]
+TOOLS = ["poetry", "pre-commit", "psutil"]
 POETRY = which("poetry") if which("poetry") else (VENV_BIN / "poetry")
 PRECOMMIT = (
     which("pre-commit") if which("pre-commit") else (VENV_BIN / "pre-commit")