diff --git a/lib/encryption/key_manager.dart b/lib/encryption/key_manager.dart
index c179e5b81..d8cb59fb9 100644
--- a/lib/encryption/key_manager.dart
+++ b/lib/encryption/key_manager.dart
@@ -667,6 +667,31 @@ class KeyManager {
     }
   }
 
+  /// Loads and stores all keys from the online key backup. This may take a
+  /// while for older and big accounts.
+  Future<void> loadAllKeys() async {
+    final info = await getRoomKeysBackupInfo();
+    final ret = await client.getRoomKeys(info.version);
+    await loadFromResponse(ret);
+  }
+
+  /// Loads all room keys for a single room and stores them. This may take a
+  /// while for older and big rooms.
+  Future<void> loadAllKeysFromRoom(String roomId) async {
+    final info = await getRoomKeysBackupInfo();
+    final ret = await client.getRoomKeysByRoomId(roomId, info.version);
+    final keys = RoomKeys.fromJson({
+      'rooms': {
+        roomId: {
+          'sessions': ret.sessions.map((k, s) => MapEntry(k, s.toJson())),
+        },
+      },
+    });
+    await loadFromResponse(keys);
+  }
+
+  /// Loads a single key for the specified room from the online key backup
+  /// and stores it.
   Future<void> loadSingleKey(String roomId, String sessionId) async {
     final info = await getRoomKeysBackupInfo();
     final ret =
diff --git a/test/encryption/online_key_backup_test.dart b/test/encryption/online_key_backup_test.dart
index 4e920615d..acc76f0ac 100644
--- a/test/encryption/online_key_backup_test.dart
+++ b/test/encryption/online_key_backup_test.dart
@@ -67,9 +67,35 @@ void main() {
           .request(client.getRoomById(roomId)!, sessionId, senderKey);
       expect(
           client.encryption!.keyManager
-                  .getInboundGroupSession(roomId, sessionId) !=
-              null,
-          true);
+              .getInboundGroupSession(roomId, sessionId)
+              ?.sessionId,
+          sessionId);
+    });
+
+    test('Load all Room Keys', () async {
+      if (!olmEnabled) return;
+      final keyManager = client.encryption!.keyManager;
+      const roomId = '!getroomkeys726s6s6q:example.com';
+      const sessionId = 'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU';
+      expect(keyManager.getInboundGroupSession(roomId, sessionId), null);
+      await client.encryption!.keyManager.loadAllKeysFromRoom(roomId);
+      expect(
+        keyManager.getInboundGroupSession(roomId, sessionId)?.sessionId,
+        sessionId,
+      );
+    });
+
+    test('Load all Keys', () async {
+      if (!olmEnabled) return;
+      final keyManager = client.encryption!.keyManager;
+      const roomId = '!getallkeys726s6s6q:example.com';
+      const sessionId = 'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU';
+      expect(keyManager.getInboundGroupSession(roomId, sessionId), null);
+      await client.encryption!.keyManager.loadAllKeys();
+      expect(
+        keyManager.getInboundGroupSession(roomId, sessionId)?.sessionId,
+        sessionId,
+      );
     });
 
     test('upload key', () async {
diff --git a/test/fake_matrix_api.dart b/test/fake_matrix_api.dart
index 0cb417a28..f92fa3579 100644
--- a/test/fake_matrix_api.dart
+++ b/test/fake_matrix_api.dart
@@ -1936,7 +1936,7 @@ class FakeMatrixApi extends BaseClient {
                   'mac': 'QzKV/fgAs4U',
                 },
               },
-      '/client/v3/room_keys/keys/${Uri.encodeComponent('!726s6s6q:example.com')}?version=5':
+      '/client/v3/room_keys/keys/${Uri.encodeComponent('!getroomkeys726s6s6q:example.com')}?version=5':
           (var req) => {
                 'sessions': {
                   'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU': {
@@ -1955,7 +1955,7 @@ class FakeMatrixApi extends BaseClient {
               },
       '/client/v3/room_keys/keys?version=5': (var req) => {
             'rooms': {
-              '!726s6s6q:example.com': {
+              '!getallkeys726s6s6q:example.com': {
                 'sessions': {
                   'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU': {
                     'first_message_index': 0,