diff --git a/spec/spec-helper.coffee b/spec/spec-helper.coffee
index f4f1f3568..f56f5c8dc 100644
--- a/spec/spec-helper.coffee
+++ b/spec/spec-helper.coffee
@@ -12,6 +12,7 @@ FindParentDir = require 'find-parent-dir'
 TextEditor = require '../src/text-editor'
 TextEditorElement = require '../src/text-editor-element'
 TextMateLanguageMode = require '../src/text-mate-language-mode'
+TreeSitterLanguageMode = require '../src/tree-sitter-language-mode'
 {clipboard} = require 'electron'
 
 jasmineStyle = document.createElement('style')
@@ -101,6 +102,7 @@ beforeEach ->
 
   # make tokenization synchronous
   TextMateLanguageMode.prototype.chunkSize = Infinity
+  TreeSitterLanguageMode.prototype.syncTimeoutMicros = Infinity
   spyOn(TextMateLanguageMode.prototype, "tokenizeInBackground").andCallFake -> @tokenizeNextChunk()
 
   # Without this spy, TextEditor.onDidTokenize callbacks would not be called