diff --git a/tests/data/test_btanalysis.py b/tests/data/test_btanalysis.py
index cb78e6a9f..4cd11a684 100644
--- a/tests/data/test_btanalysis.py
+++ b/tests/data/test_btanalysis.py
@@ -348,7 +348,7 @@ def test_calculate_expectancy(testdatadir):
 
     expectancy = calculate_expectancy(bt_data)
     assert isinstance(expectancy, float)
-    assert pytest.approx(expectancy) == 0.07151374226574791
+    assert pytest.approx(expectancy) == 5.820687070932315e-06
 
 
 def test_calculate_expectancy_ratio(testdatadir):