diff --git a/tests/unittests/conftest.py b/tests/unittests/conftest.py
index be3afe2ce12d..6b9fc9fbde0d 100644
--- a/tests/unittests/conftest.py
+++ b/tests/unittests/conftest.py
@@ -8,10 +8,10 @@
 }
 try:
     for name, kwargs in _hypothesis_profiles.items():
-        settings.register_profile(name, **kwargs)
+        settings.register_profile(name, parent=None, **kwargs)
 except TypeError:
     # Drop except when hypothesis>=3.47
     # https://hypothesis.readthedocs.io/en/latest/changes.html#v3-47-0
     for name, kwargs in _hypothesis_profiles.items():
-        settings.register_profile(name, settings(**kwargs))
+        settings.register_profile(name, settings(**kwargs))  # type: ignore
 settings.load_profile(os.getenv("HYPOTHESIS_PROFILE", "default"))
diff --git a/tox.ini b/tox.ini
index b0d5119ef5a7..b4fcc2d94e62 100644
--- a/tox.ini
+++ b/tox.ini
@@ -138,6 +138,7 @@ deps =
     {[lowest-supported-deps]deps}
     httpretty==0.8.14
 commands = {[testenv:py3]commands}
+passenv = HYPOTHESIS_PROFILE
 
 [testenv:lowest-supported-dev]
 # The oldest httpretty version to work with Python 3.7+ is 0.9.5,
@@ -147,6 +148,7 @@ deps =
     {[lowest-supported-deps]deps}
     httpretty==0.9.5
 commands = {[testenv:py3]commands}
+passenv = HYPOTHESIS_PROFILE
 
 [testenv:doc]
 deps =