diff -uNr a/test/test_location.py b/test/test_location.py
--- a/test/test_location.py	2019-02-08 11:01:26.000000000 -0800
+++ b/test/test_location.py	2019-02-11 13:13:32.352205033 -0800
@@ -18,7 +18,7 @@
 from .environment_context import EnvironmentContext
 
 
-@pytest.fixture(scope='module', autouse=True)
+@pytest.yield_fixture(scope='module', autouse=True)
 def reset_global_variables():
     yield
     from colcon_core import location