diff --git a/tests/test_unit/test_validation.py b/tests/test_unit/test_validation.py
index 5fcf9f0..cb24d91 100644
--- a/tests/test_unit/test_validation.py
+++ b/tests/test_unit/test_validation.py
@@ -9,6 +9,7 @@
     _assert_close,
     validate_atlas_files,
     validate_mesh_matches_image_extents,
+    validate_mesh_structure_pairs,
 )
 
 
@@ -69,3 +70,24 @@ def test_assert_close_negative():
         AssertionError, match="differ by more than 10 times pixel size"
     ):
         _assert_close(99.5, 30, 2)
+
+def test_validate_mesh_structure_pairs_no_obj(atlas):
+    """
+    Tests if validate_mesh_structure_pairs function raises an error,
+    when there is at least one structure in the atlas that doesn't have
+    a corresponding obj file.
+
+    True for: allen_mouse_100um (structure 545 doesn't have an obj file)
+    False for: admba_3d_e11_5_mouse_16um (it has all pairs)
+
+    """
+    with pytest.raises(
+        AssertionError, match="Structures with ID \[.*\] are in the atlas, but don't have a corresponding mesh file"
+    ):
+        validate_mesh_structure_pairs(atlas)
+
+def test_validate_mesh_structure_pairs_not_in_atlas(atlas):
+    with pytest.raises(
+        AssertionError, match="Structures with IDs \[.*\] have a mesh file, but are not accessible through the atlas"
+    ):
+        validate_mesh_structure_pairs(atlas)
\ No newline at end of file