diff --git a/README.md b/README.md
index 3fba691..11d0ca4 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,9 @@
 
 The development environment is managed using
 [Poetry](https://python-poetry.org/). If you need to make a non-trivial change
-you will want to install that so you can run the linters and formatters.
+you will want to install that so you can run the linters, formatters, and tests.
+Once installed, run `poetry install` in this directory to install the
+development dependencies.
 
 Run the type checker and linter with `make lint`.
 
diff --git a/pyproject.toml b/pyproject.toml
index fa15951..ccadcce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,9 +26,7 @@
 fail_under = 100
 
 [tool.pytest.ini_options]
-addopts = "--strict-markers"
 asyncio_mode = "auto"
-markers = ["requires_network: marks a test that requires network access"]
 xfail_strict = true
 
 [tool.mypy]