diff --git a/.gitignore b/.gitignore
index 6b9f41415..1daf793ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,6 +68,7 @@ __pycache__/
 /Code/GraphMol/Wrap/test_data/outSmiles.txt
 
 /Code/GraphMol/test_data/bilastine_trajectory.sdf
+/Code/GraphMol/test_data/prop.pkl
 
 /Projects/DbCLI/testData/bzr/