diff --git a/libs/community/langchain_community/tools/gmail/search.py b/libs/community/langchain_community/tools/gmail/search.py
index c2d5ef436e1..72125762d54 100644
--- a/libs/community/langchain_community/tools/gmail/search.py
+++ b/libs/community/langchain_community/tools/gmail/search.py
@@ -118,10 +118,10 @@ class GmailSearch(GmailBaseTool):
                     "body": body,
                     "subject": subject,
                     "sender": sender,
-                    "from": email_msg['From'],
-                    "date": email_msg['Date'],
-                    "to": email_msg['To'],
-                    "cc": email_msg['Cc'],
+                    "from": email_msg["From"],
+                    "date": email_msg["Date"],
+                    "to": email_msg["To"],
+                    "cc": email_msg["Cc"],
                 }
             )
         return results
diff --git a/libs/community/tests/unit_tests/graph_vectorstores/extractors/test_hierarchy_link_extractor.py b/libs/community/tests/unit_tests/graph_vectorstores/extractors/test_hierarchy_link_extractor.py
index 109583f6e3a..9d9b9396506 100644
--- a/libs/community/tests/unit_tests/graph_vectorstores/extractors/test_hierarchy_link_extractor.py
+++ b/libs/community/tests/unit_tests/graph_vectorstores/extractors/test_hierarchy_link_extractor.py
@@ -14,21 +14,21 @@ def test_up_only() -> None:
 
     assert extractor.extract_one(PATH_1) == {
         # Path1 links up to Root/H1
-        Link.outgoing(kind="hierarchy", tag="up:Root/H1"),
+        Link.outgoing(kind="hierarchy", tag="p:Root/H1"),
         # Path1 is linked to by stuff under Root/H1/h2
-        Link.incoming(kind="hierarchy", tag="up:Root/H1/h2"),
+        Link.incoming(kind="hierarchy", tag="p:Root/H1/h2"),
     }
 
     assert extractor.extract_one(PATH_2) == {
         # Path2 links up to Root
-        Link.outgoing(kind="hierarchy", tag="up:Root"),
+        Link.outgoing(kind="hierarchy", tag="p:Root"),
         # Path2 is linked to by stuff under Root/H1/h2
-        Link.incoming(kind="hierarchy", tag="up:Root/H1"),
+        Link.incoming(kind="hierarchy", tag="p:Root/H1"),
     }
 
     assert extractor.extract_one(PATH_3) == {
         # Path3 is linked to by stuff under Root
-        Link.incoming(kind="hierarchy", tag="up:Root"),
+        Link.incoming(kind="hierarchy", tag="p:Root"),
     }
 
 
@@ -37,31 +37,31 @@ def test_up_and_down() -> None:
 
     assert extractor.extract_one(PATH_1) == {
         # Path1 links up to Root/H1
-        Link.outgoing(kind="hierarchy", tag="up:Root/H1"),
+        Link.outgoing(kind="hierarchy", tag="p:Root/H1"),
         # Path1 is linked to by stuff under Root/H1/h2
-        Link.incoming(kind="hierarchy", tag="up:Root/H1/h2"),
+        Link.incoming(kind="hierarchy", tag="p:Root/H1/h2"),
         # Path1 links down to things under Root/H1/h2.
-        Link.outgoing(kind="hierarchy", tag="down:Root/H1/h2"),
+        Link.outgoing(kind="hierarchy", tag="c:Root/H1/h2"),
         # Path1 is linked down to by Root/H1
-        Link.incoming(kind="hierarchy", tag="down:Root/H1"),
+        Link.incoming(kind="hierarchy", tag="c:Root/H1"),
     }
 
     assert extractor.extract_one(PATH_2) == {
         # Path2 links up to Root
-        Link.outgoing(kind="hierarchy", tag="up:Root"),
+        Link.outgoing(kind="hierarchy", tag="p:Root"),
         # Path2 is linked to by stuff under Root/H1/h2
-        Link.incoming(kind="hierarchy", tag="up:Root/H1"),
+        Link.incoming(kind="hierarchy", tag="p:Root/H1"),
         # Path2 links down to things under Root/H1.
-        Link.outgoing(kind="hierarchy", tag="down:Root/H1"),
+        Link.outgoing(kind="hierarchy", tag="c:Root/H1"),
         # Path2 is linked down to by Root
-        Link.incoming(kind="hierarchy", tag="down:Root"),
+        Link.incoming(kind="hierarchy", tag="c:Root"),
     }
 
     assert extractor.extract_one(PATH_3) == {
         # Path3 is linked to by stuff under Root
-        Link.incoming(kind="hierarchy", tag="up:Root"),
+        Link.incoming(kind="hierarchy", tag="p:Root"),
         # Path3 links down to things under Root/H1.
-        Link.outgoing(kind="hierarchy", tag="down:Root"),
+        Link.outgoing(kind="hierarchy", tag="c:Root"),
     }
 
 
@@ -70,15 +70,15 @@ def test_sibling() -> None:
 
     assert extractor.extract_one(PATH_1) == {
         # Path1 links with anything else in Root/H1
-        Link.bidir(kind="hierarchy", tag="sib:Root/H1"),
+        Link.bidir(kind="hierarchy", tag="s:Root/H1"),
     }
 
     assert extractor.extract_one(PATH_2) == {
         # Path2 links with anything else in Root
-        Link.bidir(kind="hierarchy", tag="sib:Root"),
+        Link.bidir(kind="hierarchy", tag="s:Root"),
     }
 
     assert extractor.extract_one(PATH_3) == {
         # Path3 links with anything else at the top level
-        Link.bidir(kind="hierarchy", tag="sib:"),
+        Link.bidir(kind="hierarchy", tag="s:"),
     }