diff --git a/tests/test_demographics.py b/tests/test_demographics.py
index 85d838069..9e37327f0 100644
--- a/tests/test_demographics.py
+++ b/tests/test_demographics.py
@@ -260,7 +260,7 @@ def test_infant_mort():
     mort_rates, infmort_rate = demographics.get_mort(100, 0, 99, graph=False)
     # check that infant mortality equals rate hardcoded into
     # demographics.py
-    assert infmort_rate == 0.00491958
+    assert infmort_rate == 0.00477758
 
 
 def test_pop_rebin():