diff --git a/include/openmc/plot.h b/include/openmc/plot.h
index c4476af41b..7e85996de4 100644
--- a/include/openmc/plot.h
+++ b/include/openmc/plot.h
@@ -312,8 +312,8 @@ private:
   Position camera_position_;        // where camera is
   Position look_at_;                // point camera is centered looking at
   Direction up_ {0.0, 0.0, 1.0};    // which way is up
-  bool wireframe_; // draw wireframe around ID boundaries (material or cell
-                   // based on color_by)
+  bool wireframe_ {true}; // draw wireframe around ID boundaries (material or
+                          // cell based on color_by)
 
   /* The horizontal thickness, if using an orthographic projection.
    * If set to zero, we assume using a perspective projection.
diff --git a/tests/regression_tests/plot_projections/geometry.xml b/tests/regression_tests/plot_projections/geometry.xml
index 9821876444..a648dfe92f 100644
--- a/tests/regression_tests/plot_projections/geometry.xml
+++ b/tests/regression_tests/plot_projections/geometry.xml
@@ -4,7 +4,7 @@
   <surface id="1" type="z-cylinder" coeffs="0 0 2" />
   <surface id="2" type="z-cylinder" coeffs="0 0 5" />
   <surface id="3" type="z-cylinder" coeffs="0 0 10" boundary="vacuum" />
-  <surface id="4" type="y-plane" coeffs="5" boundary="vacuum" />
+  <surface id="4" type="y-plane" coeffs="5.001" boundary="vacuum" />
   <surface id="5" type="z-plane" coeffs="-5" boundary="vacuum" />
   <surface id="6" type="z-plane" coeffs="5" boundary="vacuum" />
 
diff --git a/tests/regression_tests/plot_projections/plots.xml b/tests/regression_tests/plot_projections/plots.xml
index 2d22c8865f..b25f177b06 100644
--- a/tests/regression_tests/plot_projections/plots.xml
+++ b/tests/regression_tests/plot_projections/plots.xml
@@ -13,11 +13,12 @@
 
   <plot id="2" type="projection">
     <look_at>0. 0. 0.</look_at>
-    <camera_position>20. 20. 20.</camera_position>
+    <camera_position>10. 10. 0.</camera_position>
     <width>25 25</width>
     <pixels>200 200</pixels>
     <mask components="1 3" background="255 255 255" />
     <field_of_view>90</field_of_view>
+    <filename>example1</filename>
   </plot>
 
   <plot id="3" color_by="material" type="projection">
@@ -25,6 +26,27 @@
     <camera_position>20. 20. 20.</camera_position>
     <pixels>200 200</pixels>
     <background>240 240 240</background>
+    <filename>example2.png</filename>
+  </plot>
+
+  <plot id="4" color_by="material" type="projection">
+    <look_at>0. 0. 0.</look_at>
+    <camera_position>0. 10.0 20.</camera_position>
+    <pixels>200 200</pixels>
+    <background>110 240 240</background>
+    <filename>example3.png</filename>
+  </plot>
+
+  <plot id="5" type="projection">
+    <look_at>0. 0. 0.</look_at>
+    <camera_position>10. 10. 10.</camera_position>
+    <width>25 25</width>
+    <pixels>200 200</pixels>
+    <orthographic_width>25.0</orthographic_width>
+    <filename>orthographic_example1</filename>
+    <color id="1" rgb="0 0 255" xs="10"/>
+    <color id="2" rgb="0 255 0" xs="0.1"/>
+    <color id="3" rgb="255 0 0" xs="1.0"/>
   </plot>
 
 </plots>
diff --git a/tests/regression_tests/plot_projections/results_true.dat b/tests/regression_tests/plot_projections/results_true.dat
index 45e097f62b..004b752eb8 100644
--- a/tests/regression_tests/plot_projections/results_true.dat
+++ b/tests/regression_tests/plot_projections/results_true.dat
@@ -1 +1 @@
-8231bc2d60bee9df464fbf3c5b2ea611dcd0f10232f6a9b04f58fc5226716acb31580578f74d194f8ab2df1848ea1556621bf997e1d1562d5eb8471def2a5f24
\ No newline at end of file
+5fdff140078cd45efe7a507feeb06c00fa735820157a9a5a066905468b1052640c3b81065f968f6280c05eef7e9e4305a631e0e0aa2e467c9bd9d4f1a097ab09
\ No newline at end of file
diff --git a/tests/regression_tests/plot_projections/test.py b/tests/regression_tests/plot_projections/test.py
index 2e1f4cd8df..972e0e0d71 100644
--- a/tests/regression_tests/plot_projections/test.py
+++ b/tests/regression_tests/plot_projections/test.py
@@ -56,5 +56,5 @@ class PlotTestHarness(TestHarness):
 
 
 def test_plot():
-    harness = PlotTestHarness(('projection1.png', 'projection2.png', 'projection3.png'))
+    harness = PlotTestHarness(('plot_1.png', 'example1.png', 'example3.png', 'orthographic_example1.png'))
     harness.main()