diff --git a/tests/python_tests/geometry_io_test.py b/tests/python_tests/geometry_io_test.py
index 1eeef4db6..d93b72605 100644
--- a/tests/python_tests/geometry_io_test.py
+++ b/tests/python_tests/geometry_io_test.py
@@ -54,6 +54,10 @@ wkbs = [
     [ 1, "GEOMETRYCOLLECTION(POINT EMPTY,MULTIPOINT(0 0))", '010700000002000000010400000000000000010400000001000000010100000000000000000000000000000000000000'],
     [ 0, "LINESTRING EMPTY", '010200000000000000' ],
     [ 1, "Point(0 0)", '010100000000000000000000000000000000000000' ],
+    # a few bogus inputs
+    [ 0, "", '' ],
+    [ 0, "00", '01' ],
+    [ 0, "0000", '0104' ],
 ]
 
 def test_wkb_parsing():