diff --git a/runtime/lua/vim/lsp/client.lua b/runtime/lua/vim/lsp/client.lua
index f73f97b8cd..09064b9510 100644
--- a/runtime/lua/vim/lsp/client.lua
+++ b/runtime/lua/vim/lsp/client.lua
@@ -579,6 +579,7 @@ function Client:initialize()
     initializationOptions = config.init_options,
     capabilities = self.capabilities,
     trace = self._trace,
+    workDoneToken = '1',
   }
 
   self:_run_callbacks(
diff --git a/test/functional/fixtures/fake-lsp-server.lua b/test/functional/fixtures/fake-lsp-server.lua
index 42a1248464..f806869b40 100644
--- a/test/functional/fixtures/fake-lsp-server.lua
+++ b/test/functional/fixtures/fake-lsp-server.lua
@@ -110,7 +110,8 @@ local tests = {}
 
 function tests.basic_init()
   skeleton {
-    on_init = function(_)
+    on_init = function(params)
+      assert_eq(params.workDoneToken, '1')
       return {
         capabilities = {
           textDocumentSync = protocol.TextDocumentSyncKind.None,