diff --git a/tests/v3d/memory/bug79 b/tests/v3d/memory/bug79
index 5ef3e74e42..a39a7f6611 100644
--- a/tests/v3d/memory/bug79
+++ b/tests/v3d/memory/bug79
@@ -2,6 +2,9 @@ puts "========"
 puts "OCC79"
 puts "========"
 
+set i_max 20
+set dispMode 0
+
 pload VISUALIZATION
 
 # disable VBO to avoid false memory leaks reported on NVIDIA graphics, see issue #29996
@@ -10,14 +13,15 @@ vcaps -vbo 0
 
 vinit View1
 restore [locate_data_file OCC162.brep] s
-vdisplay s
+vdisplay -dispMode $dispMode s
 
 set listmem {}
-set i_max 10
 for {set i 1} {${i} <= ${i_max}} {incr i} {
   verase s
-  vdisplay s
+  vdisplay -dispMode $dispMode s
 
   lappend listmem [meminfo h]
-  checktrend $listmem 0 1 "Memory leak detected"
 }
+
+puts $listmem
+checktrend $listmem 0 1 "Memory leak detected"