diff --git a/pytests/noxfile.py b/pytests/noxfile.py
index bab55868..7588e966 100644
--- a/pytests/noxfile.py
+++ b/pytests/noxfile.py
@@ -6,7 +6,7 @@ nox.options.sessions = ["test"]
 
 @nox.session
 def test(session: nox.Session):
-    session.install("-rrequirements-dev.txt")
+    session.install(".[dev]")
     try:
         session.install("--only-binary=numpy", "numpy>=1.16")
     except CommandFailed:
@@ -19,6 +19,5 @@ def test(session: nox.Session):
 
 @nox.session
 def bench(session: nox.Session):
-    session.install("-rrequirements-dev.txt")
-    session.install(".")
+    session.install(".[dev]")
     session.run("pytest", "--benchmark-enable", "--benchmark-only", *session.posargs)
diff --git a/pytests/pyo3_pytests/__init__.py b/pytests/pyo3_pytests/__init__.py
deleted file mode 100644
index b9d3a92f..00000000
--- a/pytests/pyo3_pytests/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-from .pyo3_pytests import *
diff --git a/pytests/pyproject.toml b/pytests/pyproject.toml
index dfebfe31..fb1ac3db 100644
--- a/pytests/pyproject.toml
+++ b/pytests/pyproject.toml
@@ -17,3 +17,12 @@ classifiers = [
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
 ]
+
+[project.optional-dependencies]
+dev = [
+    "hypothesis>=3.55",
+    "pytest-asyncio>=0.21",
+    "pytest-benchmark>=3.4",
+    "pytest>=6.0",
+    "typing_extensions>=4.0.0"
+]
diff --git a/pytests/requirements-dev.txt b/pytests/requirements-dev.txt
deleted file mode 100644
index aa0c703a..00000000
--- a/pytests/requirements-dev.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-hypothesis>=3.55
-pytest>=6.0
-pytest-asyncio>=0.21
-pytest-benchmark>=3.4
-typing_extensions>=4.0.0