diff --git a/tests/bugs/moddata_2/bug23587 b/tests/lowalgos/2dinter/bug23587
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/moddata_2/bug23587
rename to tests/lowalgos/2dinter/bug23587
diff --git a/tests/bugs/modalg_5/bug23706_4 b/tests/lowalgos/2dinter/bug23706_4
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/modalg_5/bug23706_4
rename to tests/lowalgos/2dinter/bug23706_4
diff --git a/tests/bugs/modalg_5/bug23706_5 b/tests/lowalgos/2dinter/bug23706_5
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/modalg_5/bug23706_5
rename to tests/lowalgos/2dinter/bug23706_5
diff --git a/tests/bugs/step/bug24100 b/tests/lowalgos/2dinter/bug24100
similarity index 98%
rename from tests/bugs/step/bug24100
rename to tests/lowalgos/2dinter/bug24100
index 1df0bc3f54..c8b94cf373 100644
--- a/tests/bugs/step/bug24100
+++ b/tests/lowalgos/2dinter/bug24100
@@ -8,6 +8,7 @@ puts ""
 # Bad pcurve is built on a face while converting the shape from STEP format.
 ############################################################################
 
+pload XDE
 stepread [locate_data_file bug24100_REFLECT_CURVE_PART_5_SOL_ohne_Metadaten.stp] a *
 
 explode a_1 f
diff --git a/tests/bugs/moddata_3/bug24800 b/tests/lowalgos/2dinter/bug24800
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/moddata_3/bug24800
rename to tests/lowalgos/2dinter/bug24800
diff --git a/tests/bugs/modalg_6/bug25593 b/tests/lowalgos/2dinter/bug25593
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/modalg_6/bug25593
rename to tests/lowalgos/2dinter/bug25593
diff --git a/tests/bugs/moddata_3/bug25876 b/tests/lowalgos/2dinter/bug25876
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/moddata_3/bug25876
rename to tests/lowalgos/2dinter/bug25876
diff --git a/tests/bugs/modalg_6/bug26099 b/tests/lowalgos/2dinter/bug26099
similarity index 100%
rename from tests/bugs/modalg_6/bug26099
rename to tests/lowalgos/2dinter/bug26099
diff --git a/tests/lowalgos/2dinter/bug27976 b/tests/lowalgos/2dinter/bug27976
new file mode 100644
index 0000000000..2c22e42023
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug27976
@@ -0,0 +1,37 @@
+puts "========"
+puts "0027976: Unstable work of 2d intersection algorithm for two lines"
+puts "========"
+puts ""
+
+puts "TODO OCC27976 All: Error: wrong 2-th intersection result"
+
+set aRefPx 170.0
+set aRefPy 9620.0
+
+binrestore [locate_data_file bug27976_fe.bin] b
+explode b
+don b_1
+pcurve b_1
+
+smallview -2D-
+point p1 169.98949375765261 9619.9910661265931
+point p2 170.00862369283078 9620.0101960617721
+don p1 p2
+2dfit
+don b_1_4 b_1_5
+set log(1) [2dintersect b_1_4 b_1_5 -tol 1.e-10]
+checkview -screenshot -2d -path ${imagedir}/${test_image}_1.png
+
+trim c2d b_1_5 9610 9610.0000006891
+don b_1_4 c2d
+set log(2) [2dintersect b_1_4 c2d -tol 1.e-10]
+checkview -screenshot -2d -path ${imagedir}/${test_image}_2.png
+
+for {set i 1} {$i <= 2} {incr i} {
+  if { [regexp {Intersection point 1 : ([-0-9.+eE]+) ([-0-9.+eE]+)} $log($i) full cx($i) cy($i)] } {
+    set aDist($i) [2ddistpp $aRefPx $aRefPy $cx($i) $cy($i)]
+    checkreal Distance $aDist($i) 0.0 1.e-6 0.0
+  } else {
+    puts "Error: wrong $i-th intersection result"
+  }
+}
diff --git a/tests/bugs/modalg_7/bug29162 b/tests/lowalgos/2dinter/bug29162
similarity index 100%
rename from tests/bugs/modalg_7/bug29162
rename to tests/lowalgos/2dinter/bug29162
diff --git a/tests/bugs/moddata_2/bug4426_1 b/tests/lowalgos/2dinter/bug4426_1
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/moddata_2/bug4426_1
rename to tests/lowalgos/2dinter/bug4426_1
diff --git a/tests/bugs/moddata_2/bug4426_2 b/tests/lowalgos/2dinter/bug4426_2
old mode 100755
new mode 100644
similarity index 100%
rename from tests/bugs/moddata_2/bug4426_2
rename to tests/lowalgos/2dinter/bug4426_2