diff --git a/lib/spack/spack/test/conftest.py b/lib/spack/spack/test/conftest.py
index bf6e4e6b357..617f6259ac9 100644
--- a/lib/spack/spack/test/conftest.py
+++ b/lib/spack/spack/test/conftest.py
@@ -1554,11 +1554,11 @@ def get_rev():
 @pytest.fixture()
 def mutable_mock_env_path(tmpdir_factory):
     """Fixture for mocking the internal spack environments directory."""
-    saved_path = ev.environment.env_path
+    saved_path = ev.environment.default_env_path
     mock_path = tmpdir_factory.mktemp("mock-env-path")
-    ev.environment.env_path = str(mock_path)
+    ev.environment.default_env_path = str(mock_path)
     yield mock_path
-    ev.environment.env_path = saved_path
+    ev.environment.default_env_path = saved_path
 
 
 @pytest.fixture()