diff --git a/tests/bugs/modalg_7/bug23667 b/tests/bugs/modalg_7/bug23667
new file mode 100644
index 0000000000..e62c5b94a9
--- /dev/null
+++ b/tests/bugs/modalg_7/bug23667
@@ -0,0 +1,15 @@
+puts "================"
+puts "OCC23667"
+puts "================"
+puts ""
+#######################################################################
+# checkshape command does not detect problems in the attached shape
+#######################################################################
+
+restore [locate_data_file bug23667_f_ref.brep] f
+
+checkshape f
+
+pcurve f
+
+checkview -display f -2d -path ${imagedir}/${test_image}.png