diff --git a/deepdiff/diff.py b/deepdiff/diff.py
index 36cebb19..7d935946 100755
--- a/deepdiff/diff.py
+++ b/deepdiff/diff.py
@@ -1533,7 +1533,7 @@ def _diff(self, level, parents_ids=frozenset(), _original_type=None, local_tree=
         if isinstance(level.t1, booleans):
             self._diff_booleans(level, local_tree=local_tree)
 
-        if isinstance(level.t1, strings):
+        elif isinstance(level.t1, strings):
             self._diff_str(level, local_tree=local_tree)
 
         elif isinstance(level.t1, datetimes):