diff --git a/sumpy/expansion/local.py b/sumpy/expansion/local.py
index 317900fb92c47449ca23de070e1650c04e9f9e02..9e891a2dc48399bfded9e7cb0fc6ed63f38c40e4 100644
--- a/sumpy/expansion/local.py
+++ b/sumpy/expansion/local.py
@@ -57,7 +57,8 @@ class LineTaylorLocalExpansion(LocalExpansionBase):
     def get_coefficient_identifiers(self):
         return list(range(self.order+1))
 
-    def coefficients_from_source(self, avec, bvec):
+    def coefficients_from_source(self, avec, bvec, rscale):
+        # no point in heeding rscale here--just ignore it
         if bvec is None:
             raise RuntimeError("cannot use line-Taylor expansions in a setting "
                     "where the center-target vector is not known at coefficient "
@@ -97,7 +98,8 @@ class LineTaylorLocalExpansion(LocalExpansionBase):
                     .subs("tau", 0)
                     for i in self.get_coefficient_identifiers()]
 
-    def evaluate(self, coeffs, bvec):
+    def evaluate(self, coeffs, bvec, rscale):
+        # no point in heeding rscale here--just ignore it
         from pytools import factorial
         return sym.Add(*(
                 coeffs[self.get_storage_index(i)] / factorial(i)
diff --git a/test/test_qbx.py b/test/test_qbx.py
index aa86edf876fd9dc9aef4e26c2ce10992cfa73240..3758a5d7b5af4f031dabc9770da884860c585382 100644
--- a/test/test_qbx.py
+++ b/test/test_qbx.py
@@ -82,8 +82,11 @@ def test_direct(ctx_getter):
         radius = 7 * h
         centers = unit_circle * (1 - radius)
 
+        expansion_radii = np.ones(n) * radius
+
         strengths = (sigma * h,)
-        evt, (result_qbx,) = lpot(queue, targets, sources, centers, strengths)
+        evt, (result_qbx,) = lpot(queue, targets, sources, centers, strengths,
+                expansion_radii=expansion_radii)
 
         eocrec.add_data_point(h, np.max(np.abs(result_ref - result_qbx)))