diff --git a/tests/test_decision.py b/tests/test_decision.py
index 98a40a92..60dba39f 100644
--- a/tests/test_decision.py
+++ b/tests/test_decision.py
@@ -14,7 +14,7 @@ def decision_maker():
     """
     Construct a Decision instance with predefined tolerance.
     """
-    decision_instance = Decision(TOLERANCE)
+    decision_instance = decision.Decision(TOLERANCE)
     yield decision_instance