diff --git a/keanu-python/tests/test_coal_mining.py b/keanu-python/tests/test_coal_mining.py
index <HASH>..<HASH> 100644
--- a/keanu-python/tests/test_coal_mining.py
+++ b/keanu-python/tests/test_coal_mining.py
@@ -19,7 +19,7 @@ def test_coalmining():
         m.late_rate = kn.Exponential(1.0)
 
         m.years = np.array(data.index)
-        m.beforeSwitch = m.switchpoint > m.years
+        # m.beforeSwitch = m.switchpoint > m.years
         # m.rates = kn.DoubleIf([1, 1], beforeSwitch, m.early_rate, m.late_rate)
     #     m.disasters = kn.Poisson(m.rates)
sanity check that I've identified the offending line that hangs AppVeyor