diff --git a/apps/elixir_ls_debugger/lib/debugger/variables.ex b/apps/elixir_ls_debugger/lib/debugger/variables.ex
index 903833684..f86a4309a 100644
--- a/apps/elixir_ls_debugger/lib/debugger/variables.ex
+++ b/apps/elixir_ls_debugger/lib/debugger/variables.ex
@@ -21,14 +21,14 @@ defmodule ElixirLS.Debugger.Variables do
   def child_type(var) when is_pid(var) do
     case :erlang.process_info(var) do
       :undefined -> :indexed
-      results -> :named
+      _results -> :named
     end
   end
 
   def child_type(var) when is_port(var) do
     case :erlang.port_info(var) do
       :undefined -> :indexed
-      results -> :named
+      _results -> :named
     end
   end
 
diff --git a/apps/language_server/lib/language_server/providers/completion.ex b/apps/language_server/lib/language_server/providers/completion.ex
index d6b2244f8..7a3123461 100644
--- a/apps/language_server/lib/language_server/providers/completion.ex
+++ b/apps/language_server/lib/language_server/providers/completion.ex
@@ -981,14 +981,15 @@ defmodule ElixirLS.LanguageServer.Providers.Completion do
           insert_text_format(:snippet)
         else
           insert_text_format(:plain_text)
-        end,
+        end
     }
 
-    json = if item.preselect do
-      Map.put(json, "preselect", true)
-    else
-      json
-    end
+    json =
+      if item.preselect do
+        Map.put(json, "preselect", true)
+      else
+        json
+      end
 
     # deprecated as of Language Server Protocol Specification - 3.15
     json =
diff --git a/apps/language_server/lib/language_server/source_file.ex b/apps/language_server/lib/language_server/source_file.ex
index 0db546307..0ded9737a 100644
--- a/apps/language_server/lib/language_server/source_file.ex
+++ b/apps/language_server/lib/language_server/source_file.ex
@@ -339,6 +339,8 @@ defmodule ElixirLS.LanguageServer.SourceFile do
     path = path_from_uri(uri)
 
     try do
+      true = Code.ensure_loaded?(Mix.Tasks.Format)
+
       if function_exported?(Mix.Tasks.Format, :formatter_for_file, 1) do
         {:ok, Mix.Tasks.Format.formatter_for_file(path)}
       else
diff --git a/apps/language_server/test/providers/formatting_test.exs b/apps/language_server/test/providers/formatting_test.exs
index 778a1a504..30b833c53 100644
--- a/apps/language_server/test/providers/formatting_test.exs
+++ b/apps/language_server/test/providers/formatting_test.exs
@@ -500,7 +500,11 @@ defmodule ElixirLS.LanguageServer.Providers.FormattingTest do
   end
 
   def assert_formatted(path, project_dir) do
-    assert match?({:ok, [%{}]}, format(path, project_dir)), "expected '#{path}' to be formatted"
+    assert match?(
+             {:ok, [%ElixirLS.LanguageServer.Protocol.TextEdit{} | _]},
+             format(path, project_dir)
+           ),
+           "expected '#{path}' to be formatted"
   end
 
   def refute_formatted(path, project_dir) do
@@ -512,12 +516,12 @@ defmodule ElixirLS.LanguageServer.Providers.FormattingTest do
     path = maybe_convert_path_separators("#{project_dir}/#{path}")
 
     source_file = %SourceFile{
-      text: "",
+      text: " asd  = 1",
       version: 1,
       dirty?: true
     }
 
-    File.write!(path, "")
+    File.write!(path, " asd  = 1")
     Formatting.format(source_file, SourceFile.path_to_uri(path), project_dir)
   end
 end
diff --git a/mix.lock b/mix.lock
index 86b17d3cf..30f8eac22 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,7 +1,7 @@
 %{
   "dialyxir": {:hex, :dialyxir, "1.1.0", "c5aab0d6e71e5522e77beff7ba9e08f8e02bad90dfbeffae60eaf0cb47e29488", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "07ea8e49c45f15264ebe6d5b93799d4dd56a44036cf42d0ad9c960bc266c0b9a"},
   "docsh": {:hex, :docsh, "0.7.2", "f893d5317a0e14269dd7fe79cf95fb6b9ba23513da0480ec6e77c73221cae4f2", [:rebar3], [{:providers, "1.8.1", [hex: :providers, repo: "hexpm", optional: false]}], "hexpm", "4e7db461bb07540d2bc3d366b8513f0197712d0495bb85744f367d3815076134"},
-  "elixir_sense": {:git, "https://github.com/elixir-lsp/elixir_sense.git", "192f5a18f18f2d86ff5731af143ea628c00c01c7", []},
+  "elixir_sense": {:git, "https://github.com/elixir-lsp/elixir_sense.git", "08bac2a5a0ad867908d77a7087eac756bf7cce43", []},
   "erl2ex": {:git, "https://github.com/dazuma/erl2ex.git", "244c2d9ed5805ef4855a491d8616b8842fef7ca4", []},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "getopt": {:hex, :getopt, "1.0.1", "c73a9fa687b217f2ff79f68a3b637711bb1936e712b521d8ce466b29cbf7808a", [:rebar3], [], "hexpm", "53e1ab83b9ceb65c9672d3e7a35b8092e9bdc9b3ee80721471a161c10c59959c"},