diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38da54e..6b7d84d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Not released
 
+- Remove rcodetools integration (for now)
+
 ## 0.10.0
 
 - Add --experimental-features flag
diff --git a/Rakefile b/Rakefile
index d433a1e..252c62c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -5,6 +5,7 @@ Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
   t.test_files = FileList["test/**/*_test.rb"]
+  t.warning = false
 end
 
 task :default => :test
diff --git a/language_server.gemspec b/language_server.gemspec
index f88ba52..8745ca7 100644
--- a/language_server.gemspec
+++ b/language_server.gemspec
@@ -26,7 +26,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "language_server-protocol", "0.4.0"
-  spec.add_dependency "rcodetools"
 
   spec.add_development_dependency "awesome_print"
   spec.add_development_dependency "benchmark-ips"
diff --git a/lib/language_server.rb b/lib/language_server.rb
index d0dda4e..e92b932 100644
--- a/lib/language_server.rb
+++ b/lib/language_server.rb
@@ -3,7 +3,6 @@
 require "language_server/protocol"
 require "language_server/linter/ruby_wc"
 require "language_server/linter/rubocop"
-require "language_server/completion_provider/rcodetools"
 require "language_server/completion_provider/ad_hoc"
 require "language_server/definition_provider/ad_hoc"
 require "language_server/file_store"
@@ -137,14 +136,15 @@ def on(method, &callback)
     )
   end
 
-  on :"textDocument/completion" do |request:, file_store:, project:|
+  on :"textDocument/completion" do |request:, project:|
     uri = request[:params][:textDocument][:uri]
     line, character = request[:params][:position].fetch_values(:line, :character).map(&:to_i)
 
-    providers = [CompletionProvider::Rcodetools.new(uri: uri, line: line, character: character, file_store: file_store)]
-    providers << CompletionProvider::AdHoc.new(uri: uri, line: line, character: character, project: project) if LanguageServer.adhoc_enabled?
-
-    providers.flat_map(&:call)
+    if LanguageServer.adhoc_enabled?
+      [
+        CompletionProvider::AdHoc.new(uri: uri, line: line, character: character, project: project),
+      ].flat_map(&:call)
+    end
   end
 
   on :"textDocument/definition" do |request:, project:|
diff --git a/lib/language_server/completion_provider/rcodetools.rb b/lib/language_server/completion_provider/rcodetools.rb
deleted file mode 100644
index afbcbbf..0000000
--- a/lib/language_server/completion_provider/rcodetools.rb
+++ /dev/null
@@ -1,43 +0,0 @@
-require "language_server/protocol"
-require "rcodetools/completion"
-
-module LanguageServer
-  module CompletionProvider
-    class Filter < ::Rcodetools::XMPCompletionFilter
-      @candidates_with_description_flag = true
-
-      def completion_code(*args)
-        candidates_with_class(*args)
-      rescue NewCodeError, RuntimeDataError, NoCandidates
-        [nil, []]
-      end
-    end
-
-    class Rcodetools
-      def initialize(uri:, line:, character:, file_store:)
-        @uri = uri
-        @line = line
-        @character = character
-        @file_store = file_store
-      end
-
-      def call
-        _, candidates = Filter.run(source, lineno: @line + 1, column: @character)
-        candidates.map do |candidate|
-          method_name, description = candidate.split(/\0/, 2)
-          Protocol::Interface::CompletionItem.new(
-            label: method_name,
-            detail: description,
-            kind: Protocol::Constant::CompletionItemKind::METHOD,
-          )
-        end
-      end
-
-      private
-
-        def source
-          @file_store.read_remote_uri(@uri)
-        end
-    end
-  end
-end
diff --git a/test/language_server/completion_provider/rcodetools_test.rb b/test/language_server/completion_provider/rcodetools_test.rb
deleted file mode 100644
index bbd899a..0000000
--- a/test/language_server/completion_provider/rcodetools_test.rb
+++ /dev/null
@@ -1,60 +0,0 @@
-require "test_helper"
-
-module LanguageServer
-  module CompletionProvider
-    class RcodetoolsTest < Minitest::Test
-      def setup
-        @uri = "file:///foo.rb"
-        @file_store = FileStore.new
-      end
-
-      def test_array
-        @file_store.cache(@uri, <<-EOS.strip_heredoc)
-          [].l
-        EOS
-
-        provider = Rcodetools.new(uri: @uri, line: 0, character: 4, file_store: @file_store)
-
-        candidates = [
-          Protocol::Interface::CompletionItem.new(label: "last",   kind: Protocol::Constant::CompletionItemKind::METHOD, detail: "Array#last"),
-          Protocol::Interface::CompletionItem.new(label: "lazy",   kind: Protocol::Constant::CompletionItemKind::METHOD, detail: "Enumerable#lazy"),
-          Protocol::Interface::CompletionItem.new(label: "length", kind: Protocol::Constant::CompletionItemKind::METHOD, detail: "Array#length"),
-        ]
-
-        assert { provider.call.to_json == candidates.to_json }
-      end
-
-      def test_no_candidates
-        @file_store.cache(@uri, <<-EOS.strip_heredoc)
-          [].not_exists
-        EOS
-
-        provider = Rcodetools.new(uri: @uri, line: 0, character: 13, file_store: @file_store)
-
-        assert { provider.call == [] }
-      end
-
-      def test_syntax_error
-        @file_store.cache(@uri, <<-EOS.strip_heredoc)
-          class Foo
-          [].l
-        EOS
-
-        provider = Rcodetools.new(uri: @uri, line: 1, character: 4, file_store: @file_store)
-
-        assert { provider.call == [] }
-      end
-
-      def test_runtime_error
-        @file_store.cache(@uri, <<-EOS.strip_heredoc)
-          require "not_exists"
-          [].l
-        EOS
-
-        provider = Rcodetools.new(uri: @uri, line: 1, character: 4, file_store: @file_store)
-
-        assert { provider.call == [] }
-      end
-    end
-  end
-end