diff --git a/tests/pytests/test_util.py b/tests/pytests/test_util.py
index 50c05902a74a68ce85da902c9264aef2f46a3e75..68733dc9bbe10af3e811fe0bcfddf253248f34d4 100644
--- a/tests/pytests/test_util.py
+++ b/tests/pytests/test_util.py
@@ -164,7 +164,7 @@ def test_kernel_from_cube_list(cube_kernels):
 
 def test_kernel_from_cube_list_expanded(monkeypatch, tmpdir, pvl_four_group, cube_kernels):
     monkeypatch.setenv('ISISROOT', str(tmpdir))
-    monkeypatch.setenv('ISIS3DATA', '/test/path')
+    monkeypatch.setenv('ISISDATA', '/test/path')
 
     with open(tmpdir.join('IsisPreferences'), 'w+') as pvl_isisroot_file:
         pvl_isisroot_file.write(pvl_four_group)
@@ -185,7 +185,7 @@ def test_kernel_from_cube_dict(cube_kernels):
 
 def test_kernel_from_cube_dict_expanded(monkeypatch, tmpdir, pvl_four_group, cube_kernels):
     monkeypatch.setenv('ISISROOT', str(tmpdir))
-    monkeypatch.setenv('ISIS3DATA', '/test/path')
+    monkeypatch.setenv('ISISDATA', '/test/path')
 
     with open(tmpdir.join('IsisPreferences'), 'w+') as pvl_isisroot_file:
         pvl_isisroot_file.write(pvl_four_group)