Reset random.seed() before every test case

noxfile.py

@@ -230,11 +230,14 @@ TEST_DEPENDENCIES = (
     "packaging",
     "pytest",
     "pytest-cov",
+    "pytest-randomly",
     "semver",
     'typing-extensions; python_version < "3.11"',  # to support Python 3.9 & 3.10
     "xdoctest",
 )
 
+TEST_RANDOM_SEED = "--randomly-seed=42"
+
 
 @nox.session(python=SUPPORTED_PYTHONS)
 def test(session: nox.Session) -> None:
@@ -250,6 +253,7 @@ def test(session: nox.Session) -> None:
     args = posargs or (
         "--cov",
         "--no-cov-on-fail",
+        TEST_RANDOM_SEED,
         TESTS_LOCATION,
     )
 
@@ -294,6 +298,7 @@ def test_coverage_run(session: nox.Session) -> None:
         "run",
         "-m",
         "pytest",
+        TEST_RANDOM_SEED,
         TESTS_LOCATION,
     )
 

poetry.lock

@@ -1219,6 +1219,21 @@ pytest = ">=4.6"
 [package.extras]
 testing = ["fields", "hunter", "process-tests", "pytest-xdist", "virtualenv"]
 
+[[package]]
+name = "pytest-randomly"
+version = "3.15.0"
+description = "Pytest plugin to randomly order tests and control random.seed."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pytest_randomly-3.15.0-py3-none-any.whl", hash = "sha256:0516f4344b29f4e9cdae8bce31c4aeebf59d0b9ef05927c33354ff3859eeeca6"},
+    {file = "pytest_randomly-3.15.0.tar.gz", hash = "sha256:b908529648667ba5e54723088edd6f82252f540cc340d748d1fa985539687047"},
+]
+
+[package.dependencies]
+importlib-metadata = {version = ">=3.6.0", markers = "python_version < \"3.10\""}
+pytest = "*"
+
 [[package]]
 name = "pyyaml"
 version = "6.0.2"
@@ -1699,4 +1714,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "d5e420036c32cb6043efd303ae45663287a7bda00036c94fd9497f9346fde701"
+content-hash = "31a7b1ad8dd8949814d1f397022e400cd37643c6f5e9e438054de472091bcd69"

pyproject.toml

@@ -77,6 +77,7 @@ coverage = "^7.6"
 packaging = "^24.1"  # to test the version identifier
 pytest = "^8.3"
 pytest-cov = "^5.0"
+pytest-randomly = "^3.15"
 semver = "^3.0"  # to test the version identifier
 tomli = [ { python = "<3.11", version = "^2.0" } ]
 xdoctest = { extras = ["colors"], version = "^1.2" }