diff --git a/pyproject.toml b/pyproject.toml
index c3c2367c..28c7707f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -308,12 +308,14 @@ minversion = "7.4"
 addopts = "--benchmark-disable"
 # Deactivate default name pattern for test classes (we use pytest_describe).
 python_classes = "PyTest*"
-# Handle all async fixtures and tests automatically by asyncio
+# Handle all async fixtures and tests automatically by asyncio,
 asyncio_mode = "auto"
 # Set a timeout in seconds for aborting tests that run too long.
 timeout = "100"
 # Ignore config options not (yet) available in older Python versions.
 filterwarnings = "ignore::pytest.PytestConfigWarning"
+# All tests can be found in the tests directory.
+testpaths = ["tests"]
 
 [build-system]
 requires = ["poetry_core>=1.6.1,<2"]