diff --git a/noxfile.py b/noxfile.py
index 082ac78..f056b7a 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -3,6 +3,7 @@ import nox
 
 @nox.session(python=["3.7", "3.8", "3.9"])
 def tests(session):
+    args = session.posargs or ["--cov"]
     session.run("poetry", "install", external=True)
-    session.run("pytest", "--cov")
+    session.run("pytest", *args)
     pass
diff --git a/pyproject.toml b/pyproject.toml
index 914b0dd..f90ff08 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,6 @@ click = "^8.0"
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"
 coverage = {extras = ["toml"], version = "^6.2"}
-
 pytest-cov = "^3.0.0"
 pytest-mock = "^3.6.1"