diff --git a/swh/graphql/resolvers/directory_entry.py b/swh/graphql/resolvers/directory_entry.py
--- a/swh/graphql/resolvers/directory_entry.py
+++ b/swh/graphql/resolvers/directory_entry.py
@@ -56,6 +56,8 @@
         if name_include is not None:
             # STORAGE-TODO, move this filter to swh-storage
             entries = [
-                x for x in entries if name_include.lower().encode() in x.name.lower()
+                x
+                for x in entries
+                if name_include.casefold() in x.name.decode().casefold()
             ]
         return utils.paginated(entries, self._get_first_arg(), self._get_after_arg())
diff --git a/swh/graphql/tests/data.py b/swh/graphql/tests/data.py
--- a/swh/graphql/tests/data.py
+++ b/swh/graphql/tests/data.py
@@ -127,6 +127,21 @@
     ]
 
 
+def get_directories_with_special_name_entries():
+    return [
+        Directory(
+            entries=(
+                DirectoryEntry(
+                    name="ßßétEÉt".encode(),
+                    perms=0o644,
+                    type="file",
+                    target=get_contents()[0].sha1_git,
+                ),
+            )
+        )
+    ]
+
+
 def get_visit_with_multiple_status():
     return [
         OriginVisitStatus(
@@ -144,7 +159,8 @@
 GRAPHQL_EXTRA_TEST_OBJECTS = {
     "release": get_releases_with_target(),
     "revision": get_revisions_with_parents(),
-    "directory": get_directories_with_nested_path(),
+    "directory": get_directories_with_nested_path()
+    + get_directories_with_special_name_entries(),
     "origin_visit_status": get_visit_with_multiple_status(),
 }
 
diff --git a/swh/graphql/tests/functional/test_directory_entry.py b/swh/graphql/tests/functional/test_directory_entry.py
--- a/swh/graphql/tests/functional/test_directory_entry.py
+++ b/swh/graphql/tests/functional/test_directory_entry.py
@@ -9,7 +9,11 @@
 from swh.model.swhids import CoreSWHID, ObjectType
 
 from . import utils
-from ..data import get_directories, get_directories_with_nested_path
+from ..data import (
+    get_directories,
+    get_directories_with_nested_path,
+    get_directories_with_special_name_entries,
+)
 
 
 def get_target_type(target_type):
@@ -154,3 +158,31 @@
         for entry in data["directory"]["entries"]["nodes"]:
             assert name_include in entry["name"]["text"]
             assert entry["targetType"] == get_target_type(dir_entry["type"])
+
+
+def test_directory_entry_connection_filter_by_name_special_chars(client):
+    directory = get_directories_with_special_name_entries()[0]
+    query_str = """
+    query getDirectory($swhid: SWHID!, $nameInclude: String) {
+      directory(swhid: $swhid) {
+        entries(nameInclude: $nameInclude) {
+          nodes {
+            targetType
+            name {
+              text
+            }
+          }
+        }
+      }
+    }
+    """
+    data, _ = utils.get_query_response(
+        client,
+        query_str,
+        swhid=str(directory.swhid()),
+        nameInclude="ssSSé",
+    )
+    assert data["directory"]["entries"]["nodes"][0] == {
+        "name": {"text": "ßßétEÉt"},
+        "targetType": "content",
+    }