diff --git a/tests/bugs/modalg_6/bug26953_1 b/tests/bugs/modalg_6/bug26953_1
new file mode 100644
index 0000000000..7772353c39
--- /dev/null
+++ b/tests/bugs/modalg_6/bug26953_1
@@ -0,0 +1,22 @@
+puts "============"
+puts "OCC26953"
+puts "============"
+puts ""
+###############################
+## First test case for Set-43
+###############################
+
+restore [locate_data_file bug26953_B43_1.brep] b1
+restore [locate_data_file bug26953_Tank43.brep] b2
+
+bfuzzyvalue 6.e-3
+bclearobjects
+bcleartools
+baddobjects b1
+baddtools b2
+bfillds
+bbop result 0
+
+set square 14.0552
+
+set 2dviewer 1
diff --git a/tests/bugs/modalg_6/bug26953_2 b/tests/bugs/modalg_6/bug26953_2
new file mode 100644
index 0000000000..9310b3d2b7
--- /dev/null
+++ b/tests/bugs/modalg_6/bug26953_2
@@ -0,0 +1,22 @@
+puts "============"
+puts "OCC26953"
+puts "============"
+puts ""
+###############################
+## Second test case for Set-43
+###############################
+
+restore [locate_data_file bug26953_B43_2.brep] b1
+restore [locate_data_file bug26953_Tank43.brep] b2
+
+bfuzzyvalue 5.e-2
+bclearobjects
+bcleartools
+baddobjects b1
+baddtools b2
+bfillds
+bbop result 0
+
+set square 44.5496
+
+set 2dviewer 1
diff --git a/tests/bugs/modalg_6/bug26953_3 b/tests/bugs/modalg_6/bug26953_3
new file mode 100644
index 0000000000..d4eca40a08
--- /dev/null
+++ b/tests/bugs/modalg_6/bug26953_3
@@ -0,0 +1,22 @@
+puts "============"
+puts "OCC26953"
+puts "============"
+puts ""
+###############################
+## Third test case for Set-43
+###############################
+
+restore [locate_data_file bug26953_B43_3.brep] b1
+restore [locate_data_file bug26953_Tank43.brep] b2
+
+bfuzzyvalue 5.e-2
+bclearobjects
+bcleartools
+baddobjects b1
+baddtools b2
+bfillds
+bbop result 0
+
+set square 40.7804
+
+set 2dviewer 1
diff --git a/tests/bugs/modalg_6/bug26953_4 b/tests/bugs/modalg_6/bug26953_4
new file mode 100644
index 0000000000..fc0b86bea7
--- /dev/null
+++ b/tests/bugs/modalg_6/bug26953_4
@@ -0,0 +1,22 @@
+puts "============"
+puts "OCC26953"
+puts "============"
+puts ""
+###############################
+## Fourth test case for Set-43
+###############################
+
+restore [locate_data_file bug26953_B43_4.brep] b1
+restore [locate_data_file bug26953_Tank43.brep] b2
+
+bfuzzyvalue 6.e-3
+bclearobjects
+bcleartools
+baddobjects b1
+baddtools b2
+bfillds
+bbop result 0
+
+set square 12.4299
+
+set 2dviewer 1