diff --git a/tests/bugs/modalg_5/bug23948_1 b/tests/bugs/modalg_5/bug23948_1
new file mode 100644
index 0000000000..88cdb01e0f
--- /dev/null
+++ b/tests/bugs/modalg_5/bug23948_1
@@ -0,0 +1,25 @@
+puts "========="
+puts "OCC23948"
+puts "========="
+puts ""
+###########################################################
+# Wrong intersection between a surface of revolution and a plane.
+###########################################################
+
+set MaxTol 1.0e-4
+set NbCurv_OK 2
+
+restore [locate_data_file bug22766_f1] f1
+restore [locate_data_file bug22766_f2] f2
+
+set log [bopcurves f1 f2]
+
+regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} ${log} full Toler NbCurv
+
+if {${NbCurv} != ${NbCurv_OK}} {
+  puts "Error: ${NbCurv_OK} curve(s) expected, but ${NbCurv} found."
+}
+
+if {${Toler} > ${MaxTol}} {
+  puts "Error: Tolerance is too big!"
+}
diff --git a/tests/bugs/modalg_5/bug23948_2 b/tests/bugs/modalg_5/bug23948_2
new file mode 100644
index 0000000000..4e60dd3051
--- /dev/null
+++ b/tests/bugs/modalg_5/bug23948_2
@@ -0,0 +1,44 @@
+puts "========="
+puts "OCC23948"
+puts "========="
+puts ""
+###########################################################
+# Wrong intersection between a surface of revolution and a plane.
+###########################################################
+
+restore [locate_data_file bug22766_f1] f1
+restore [locate_data_file bug22766_f2] f2
+
+bopcurves f1 f2
+
+mksurface s1 f1
+mksurface s2 f2
+
+dlog reset
+dlog on
+xdistcs c_1 s2 0 1 10 
+set Log1 [dlog get]
+
+set List1 [split ${Log1} {TD= \t\n}]
+
+set L1 [llength ${List1}]
+set L2 10
+set L3 5
+set N [expr (${L1} - ${L2})/${L3} + 1]
+set Tolerance 1.0e-3
+set D_good 0.
+
+for {set i 1} {${i} <= ${N}} {incr i} {
+   set j1 [expr ${L2} + (${i}-1)*${L3}]
+   set j2 [expr ${j1} + 2]
+   set T [lindex ${List1} ${j1}]
+   set D [lindex ${List1} ${j2}]
+   #puts "i=${i} j1=${j1} j2=${j2} T=${T} D=${D}"
+   if { [expr abs(${D} - ${D_good})] > ${Tolerance} } {
+      puts "Error: i=${i} T=${T} D=${D}"
+   }
+}
+
+smallview
+fit
+set only_screen_axo 1