diff --git a/prody/tests/proteins/test_insty.py b/prody/tests/proteins/test_insty.py
index fefe27258..594041d7d 100644
--- a/prody/tests/proteins/test_insty.py
+++ b/prody/tests/proteins/test_insty.py
@@ -146,7 +146,7 @@ def testImportHpb(self):
             except ImportError:
                 imported_hpb = False
             
-        if sys.version_info[1] < 11:
+        if sys.version_info[1] < 13:
             self.assertTrue(imported_hpb)
         else:
             self.assertFalse(imported_hpb)