diff --git a/sunpy/coordinates/tests/test_ephemeris.py b/sunpy/coordinates/tests/test_ephemeris.py
index f0cc1dcfbf0..ae2a457177c 100644
--- a/sunpy/coordinates/tests/test_ephemeris.py
+++ b/sunpy/coordinates/tests/test_ephemeris.py
@@ -1,11 +1,13 @@
 # -*- coding: utf-8 -*-
 
+import pytest
+
 import astropy.units as u
+from astropy.config.paths import set_temp_cache
+from astropy.constants import c as speed_of_light
+from astropy.coordinates import EarthLocation, SkyCoord
 from astropy.tests.helper import assert_quantity_allclose
-from astropy.coordinates import SkyCoord, EarthLocation
 from astropy.time import Time
-from astropy.constants import c as speed_of_light
-import pytest
 
 from sunpy.coordinates.ephemeris import *
 
@@ -114,18 +116,21 @@ def test_get_sun_orientation():
     assert_quantity_allclose(angle, -110.8*u.deg, atol=0.1*u.deg)
 
 
+
 @pytest.mark.remote_data
-def test_get_horizons_coord():
+def test_get_horizons_coord(tmpdir):
     # get_horizons_coord() depends on astroquery
     astroquery = pytest.importorskip("astroquery")
 
-    # Validate against published values from the Astronomical Almanac (2013)
-    e1 = get_horizons_coord('Geocenter', '2013-Jan-01')
+    with set_temp_cache(tmpdir):
+        # Validate against published values from the Astronomical Almanac (2013)
+        e1 = get_horizons_coord('Geocenter', '2013-Jan-01')
     assert_quantity_allclose((e1.lon + 1*u.deg) % (360*u.deg), 1*u.deg, atol=5e-6*u.deg)
     assert_quantity_allclose(e1.lat, -3.03*u.deg, atol=5e-3*u.deg)
     assert_quantity_allclose(e1.radius, 0.9832947*u.AU, atol=5e-7*u.AU)
 
-    e2 = get_horizons_coord('Geocenter', '2013-Sep-01')
+    with set_temp_cache(tmpdir):
+        e2 = get_horizons_coord('Geocenter', '2013-Sep-01')
     assert_quantity_allclose((e2.lon + 1*u.deg) % (360*u.deg), 1*u.deg, atol=5e-6*u.deg)
     assert_quantity_allclose(e2.lat, 7.19*u.deg, atol=5e-3*u.deg)
     assert_quantity_allclose(e2.radius, 1.0092561*u.AU, atol=5e-7*u.AU)
@@ -138,5 +143,6 @@ def test_consistency_with_horizons():
 
     # Check whether the location of Earth is the same between Astropy and JPL HORIZONS
     e1 = get_earth()
-    e2 = get_horizons_coord('Geocenter')
+    with set_temp_cache(tmpdir):
+        e2 = get_horizons_coord('Geocenter')
     assert_quantity_allclose(e1.separation_3d(e2), 0*u.km, atol=25*u.km)
diff --git a/tox.ini b/tox.ini
index 966ee6d9edb..e0faecacfa3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,6 @@ changedir = tmp
 setenv =
     MPLBACKEND = agg
     COLUMNS = 180
-    HOME = {homedir}
     PYTEST_COMMAND = pytest --pyargs sunpy --cov=sunpy --cov-config={toxinidir}/setup.cfg --verbose -m "not figure" --durations=25
 extras = all,tests
 deps =