diff --git a/test/test_context.py b/test/test_context.py
index 734f84470f6b4a4ac6894746c5594437f9fea2e3..71823249c649c765fbbe79f31508386aa3d96229 100644
--- a/test/test_context.py
+++ b/test/test_context.py
@@ -89,4 +89,5 @@ def test_many_contexts():
         with ImpactTracker(fname):
             _helper_function()
 
-    DataInterface(files)
+    di = DataInterface(files)
+    assert di.total_power > 0 and di.kg_carbon > 0