diff --git a/aiapy/data/__init__.py b/aiapy/data/__init__.py
index 3c316cf..e69de29 100644
--- a/aiapy/data/__init__.py
+++ b/aiapy/data/__init__.py
@@ -1,3 +0,0 @@
-from aiapy.data._sample import download_sample_data
-
-__all__ = ["download_sample_data"]
diff --git a/aiapy/tests/test_idl.py b/aiapy/tests/test_idl.py
index 9a0f82f..37846a9 100644
--- a/aiapy/tests/test_idl.py
+++ b/aiapy/tests/test_idl.py
@@ -58,14 +58,15 @@ def test_error_consistent(idl_environment, channel, counts, include_eve, include
     assert u.allclose(error, error_ssw, rtol=1e-4)
 
 
-@pytest.mark.parametrize("channel", CHANNELS)
-def psf_idl(idl_environment, channels):
+
+@pytest.fixture(params=CHANNELS)
+def psf_idl(idl_environment, request):
     """
     The point spread function as calculated by aia_calc_psf.pro.
     """
     r = idl_environment.run(
         "psf = aia_calc_psf({{channel}},/use_preflightcore)",
-        args={"channel": f"{channels[0].value:.0f}"},
+        args={"channel": f"{request.value:.0f}"},
         save_vars=["psf"],
         verbose=False,
     )
diff --git a/tox.ini b/tox.ini
index d531f07..5fb60f4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -42,7 +42,7 @@ extras =
     docs
 commands =
     pip freeze --all --no-input
-    sphinx-build -j auto --color -W --keep-going -b html -d _build/.doctrees . _build/html {posargs}
+    sphinx-build --color -W --keep-going -b html -d _build/.doctrees . _build/html {posargs}
     python -c 'import pathlib; print("Documentation available under file://\{0\}".format(pathlib.Path(r"{toxinidir}") / "docs" / "_build" / "index.html"))'
 
 [testenv:codestyle]