diff --git a/tests/unit_tests/test_grouping.py b/tests/unit_tests/test_grouping.py
index 423834d8..4e478564 100644
--- a/tests/unit_tests/test_grouping.py
+++ b/tests/unit_tests/test_grouping.py
@@ -58,7 +58,7 @@ def test_grouping(
 
 #timing test on (seeded) random generated data to monitor grouping performance
 def test_grouping_performance(
-        expected_time : int = 25
+        expected_time : int = 35
 ):
     
     #test grouping performance with dummy dataset