diff --git a/tensorflow_probability/python/distributions/bates_test.py b/tensorflow_probability/python/distributions/bates_test.py
index d252a675a6..f2ca52b216 100644
--- a/tensorflow_probability/python/distributions/bates_test.py
+++ b/tensorflow_probability/python/distributions/bates_test.py
@@ -257,7 +257,7 @@ def testBatesPDFisNormalized(self, total_count, bounds):
     x = tf.linspace(low, high, nx)
     y = self.evaluate(d.prob(x))
     dx = self.evaluate(x[1] - x[0])
-    self.assertAllClose(scipy.integrate.simps(y=y, dx=dx), 1.,
+    self.assertAllClose(scipy.integrate.simpson(y=y, dx=dx), 1.,
                         atol=5e-05, rtol=5e-05)
 
   def testBatesPDFonNaNs(self):