diff --git a/src/Tokenizer.js b/src/Tokenizer.js
index 3100c2579b..e786450fa9 100644
--- a/src/Tokenizer.js
+++ b/src/Tokenizer.js
@@ -319,22 +319,9 @@ export class Tokenizer {
         if (!list.loose) {
           // Check if list should be loose
           const spacers = list.items[i].tokens.filter(t => t.type === 'space');
-          const hasMultipleLineBreaks = spacers.length && spacers.every(t => {
-            const chars = t.raw.split('');
-            let lineBreaks = 0;
-            for (const char of chars) {
-              if (char === '\n') {
-                lineBreaks += 1;
-              }
-              if (lineBreaks > 1) {
-                return true;
-              }
-            }
-
-            return false;
-          });
+          const hasMultipleLineBreaks = spacers.length > 0 && spacers.every(t => /\n.*\n/.test(t.raw));
 
-          list.loose = !!hasMultipleLineBreaks;
+          list.loose = hasMultipleLineBreaks;
         }
       }