diff --git a/tests/test_complex_cell/geometry.xml b/tests/test_complex_cell/geometry.xml
index 18e304fe0e..a695396e01 100644
--- a/tests/test_complex_cell/geometry.xml
+++ b/tests/test_complex_cell/geometry.xml
@@ -15,10 +15,11 @@
   <surface id="14" type="y-plane" coeffs="4" />
   <surface id="15" type="y-plane" coeffs="7" />
   <surface id="16" type="y-plane" coeffs="10" boundary="vacuum" />
+  <surface id="17" type="y-plane" coeffs="0" />
 
   <cell id="1" material="1" region="3 -4 13 -14" />
   <cell id="2" material="2" region="2 -5 12 -15 ~(3 -4 13 -14)" />
-  <cell id="3" material="3" region="7 -6 11 -16 (-2 | 5 | -12 | 15)" />
-  <cell id="4" material="4" region="((1 -7) 11 -16) ~(2 -5 (12 -15))" />
+  <cell id="3" material="3" region="((1 -7 17 -16) | (7 -6 11 -17)) (-2 | 5 | -12 | 15)" />
+  <cell id="4" material="4" region="((1 -7 11 -17) | (7 -6 17 -16)) ~(2 -5 12 -15)" />
 
 </geometry>
diff --git a/tests/test_complex_cell/results_true.dat b/tests/test_complex_cell/results_true.dat
index 56e7e409f0..97f228e3ee 100644
--- a/tests/test_complex_cell/results_true.dat
+++ b/tests/test_complex_cell/results_true.dat
@@ -1,11 +1,11 @@
 k-combined:
-2.651570E-01 2.116381E-03
+2.565769E-01 8.980879E-04
 tally 1:
-2.639097E+00
-1.394398E+00
-2.743740E+00
-1.506124E+00
-1.041248E+00
-2.177204E-01
-1.087210E-01
-2.365126E-03
+2.584080E+00
+1.335682E+00
+2.763580E+00
+1.528633E+00
+1.007148E+00
+2.031543E-01
+1.113696E-01
+2.485351E-03