diff --git a/pytential/qbx/__init__.py b/pytential/qbx/__init__.py
index 2212b0057477f84c9cac14838d0f003e18d9eaaa..8a3822c3a3bed049ba5e7e9c8174d3c40c8bf0f1 100644
--- a/pytential/qbx/__init__.py
+++ b/pytential/qbx/__init__.py
@@ -218,8 +218,7 @@ class QBXLayerPotentialSource(LayerPotentialSourceBase):
         from pytential.qbx.refinement import refine_for_global_qbx
 
         from meshmode.discretization.poly_element import (
-                InterpolatoryQuadratureSimplexGroupFactory,
-                QuadratureSimplexGroupFactory)
+                InterpolatoryQuadratureSimplexGroupFactory)
 
         if target_order is None:
             target_order = self.density_discr.groups[0].order
@@ -228,7 +227,6 @@ class QBXLayerPotentialSource(LayerPotentialSourceBase):
                 self,
                 self.refiner_code_container,
                 InterpolatoryQuadratureSimplexGroupFactory(target_order),
-                QuadratureSimplexGroupFactory(self.fine_order),
                 kernel_length_scale=kernel_length_scale,
                 maxiter=maxiter)
 
diff --git a/pytential/qbx/refinement.py b/pytential/qbx/refinement.py
index 8efd9a8800f614f9d54a5d30285f108c42072ba1..9034e5fbe340c1cc30903fddac389109f73fcb0c 100644
--- a/pytential/qbx/refinement.py
+++ b/pytential/qbx/refinement.py
@@ -477,7 +477,7 @@ def make_empty_refine_flags(queue, lpot_source, use_base_fine_discr=False):
 # {{{ main entry point
 
 def refine_for_global_qbx(lpot_source, code_container,
-        group_factory, fine_group_factory, kernel_length_scale=None,
+        group_factory, kernel_length_scale=None,
         # FIXME: Set debug=False once everything works.
         refine_flags=None, debug=True, maxiter=50):
     """
@@ -491,10 +491,6 @@ def refine_for_global_qbx(lpot_source, code_container,
         :class:`meshmode.mesh.discretization.ElementGroupFactory`. Used for
         discretizing the coarse refined mesh.
 
-    :arg fine_group_factory: An instance of
-        :class:`meshmode.mesh.discretization.ElementGroupFactory`. Used for
-        oversample the refined mesh at the finest level.
-
     :arg kernel_length_scale: The kernel length scale, or *None* if not
         applicable. All panels are refined to below this size.
 
diff --git a/test/test_global_qbx.py b/test/test_global_qbx.py
index c5f77476b908ab7e5681784e6de73fa647ef428c..45f8d9f13319b0b0a00ffe5d2b7e4085af09fe3a 100644
--- a/test/test_global_qbx.py
+++ b/test/test_global_qbx.py
@@ -85,11 +85,9 @@ def run_source_refinement_test(ctx_getter, mesh, order, helmholtz_k=None):
 
     from meshmode.discretization import Discretization
     from meshmode.discretization.poly_element import (
-            InterpolatoryQuadratureSimplexGroupFactory,
-            QuadratureSimplexGroupFactory)
+            InterpolatoryQuadratureSimplexGroupFactory)
 
     factory = InterpolatoryQuadratureSimplexGroupFactory(order)
-    fine_factory = QuadratureSimplexGroupFactory(4 * order)
 
     discr = Discretization(cl_ctx, mesh, factory)
 
@@ -105,7 +103,7 @@ def run_source_refinement_test(ctx_getter, mesh, order, helmholtz_k=None):
 
     lpot_source, conn = refine_for_global_qbx(
             lpot_source, RefinerCodeContainer(cl_ctx),
-            factory, fine_factory, **refiner_extra_kwargs)
+            factory, **refiner_extra_kwargs)
 
     from pytential.qbx.utils import get_centers_on_side