diff --git a/tests/regression_tests/plot_projections/plots.xml b/tests/regression_tests/plot_projections/plots.xml
index b25f177b06..11fa27211f 100644
--- a/tests/regression_tests/plot_projections/plots.xml
+++ b/tests/regression_tests/plot_projections/plots.xml
@@ -18,6 +18,7 @@
     <pixels>200 200</pixels>
     <mask components="1 3" background="255 255 255" />
     <field_of_view>90</field_of_view>
+    <wireframe_thickness>4</wireframe_thickness>
     <filename>example1</filename>
   </plot>
 
@@ -43,6 +44,7 @@
     <width>25 25</width>
     <pixels>200 200</pixels>
     <orthographic_width>25.0</orthographic_width>
+    <wireframe_thickness>2</wireframe_thickness>
     <filename>orthographic_example1</filename>
     <color id="1" rgb="0 0 255" xs="10"/>
     <color id="2" rgb="0 255 0" xs="0.1"/>
diff --git a/tests/regression_tests/plot_projections/results_true.dat b/tests/regression_tests/plot_projections/results_true.dat
index 004b752eb8..638981dc78 100644
--- a/tests/regression_tests/plot_projections/results_true.dat
+++ b/tests/regression_tests/plot_projections/results_true.dat
@@ -1 +1 @@
-5fdff140078cd45efe7a507feeb06c00fa735820157a9a5a066905468b1052640c3b81065f968f6280c05eef7e9e4305a631e0e0aa2e467c9bd9d4f1a097ab09
\ No newline at end of file
+96690b9e545d24b4e922aa30bffdd09863315e4a10301a5402c1b9f196a5ad67a1c8ac00231a1eeadb5d9c4f87cccd13bd86105765b002572acc4a33a32b070f
\ No newline at end of file