diff --git a/lib/ace/mode/css_tokenizer_test.js b/lib/ace/mode/css_tokenizer_test.js
index 90f3bc88..e30d2d8f 100644
--- a/lib/ace/mode/css_tokenizer_test.js
+++ b/lib/ace/mode/css_tokenizer_test.js
@@ -57,7 +57,7 @@ module.exports = {
         var line = "-12px";
         var tokens = this.tokenizer.getLineTokens(line, "ruleset").tokens;
 
-        assert.equal(1, tokens.length);
+        assert.equal(2, tokens.length);
         assert.equal("constant.numeric", tokens[0].type);
     },