diff --git a/explore/precision.py b/explore/precision.py
index 01053594..47eb71a8 100755
--- a/explore/precision.py
+++ b/explore/precision.py
@@ -721,7 +721,7 @@ def main():
         comparator = FUNCTIONS[k]
         comparator.run(xrange=xrange, diff=diff)
         if multiple:
-            raw_input()
+            input()
     if not multiple:
         pylab.show()
 
diff --git a/sasmodels/models/hardsphere.py b/sasmodels/models/hardsphere.py
index 8346033f..44aa7847 100644
--- a/sasmodels/models/hardsphere.py
+++ b/sasmodels/models/hardsphere.py
@@ -102,7 +102,7 @@ def random():
 # assuming double precision sasview is correct
 tests = [
     [{'scale': 1.0, 'background' : 0.0, 'radius_effective' : 50.0,
-      'volfraction' : 0.2, 'radius_effective_pd' : 0},
+      'volfraction' : 0.2},
      [0.001, 0.1], [0.209128, 0.930587]],
 ]
 # ADDED by: RKH  ON: 16Mar2016  using equations from FISH as better than