diff --git a/cellcommunicationpf2/tests/test_OP.py b/cellcommunicationpf2/tests/test_OP.py
index b8254d6..83cf848 100644
--- a/cellcommunicationpf2/tests/test_OP.py
+++ b/cellcommunicationpf2/tests/test_OP.py
@@ -11,7 +11,6 @@ def test_project_data():
     # Define dimensions
     cells = 20
     LR = 10
-    obs = 5
     rank = 5
 
     # Generate random X_list