diff --git a/src/db/unit_tests/dbAsIfFlatRegionTests.cc b/src/db/unit_tests/dbAsIfFlatRegionTests.cc
index cc9b8b1bf..8a8991545 100644
--- a/src/db/unit_tests/dbAsIfFlatRegionTests.cc
+++ b/src/db/unit_tests/dbAsIfFlatRegionTests.cc
@@ -204,8 +204,6 @@ TEST(3_BoolAndNot)
   db::Region tr42and3  = r42.andnot (r3).first;
   db::Region tr42and42 = r42.andnot (r42).first;
 
-  EXPECT_EQ (r2and3.is_merged (), false);
-
   {
     db::Layout target;
     unsigned int target_top_cell_index = target.add_cell (ly.cell_name (top_cell_index));
diff --git a/testdata/algo/flat_region_au3.gds b/testdata/algo/flat_region_au3.gds
index 7587aef1b..74fba6e4f 100644
Binary files a/testdata/algo/flat_region_au3.gds and b/testdata/algo/flat_region_au3.gds differ
diff --git a/testdata/algo/flat_region_au3b.gds b/testdata/algo/flat_region_au3b.gds
index 3d2db2130..b6040526f 100644
Binary files a/testdata/algo/flat_region_au3b.gds and b/testdata/algo/flat_region_au3b.gds differ