diff --git a/static/katex.less b/static/katex.less
index 626aab7..9a640db 100644
--- a/static/katex.less
+++ b/static/katex.less
@@ -347,7 +347,7 @@
 
     .rule {
         display: inline-block;
-        border-style: solid;
+        border: solid 0;
         position: relative;
     }
 
diff --git a/test/screenshotter/images/LeftRightStyleSizing-chrome.png b/test/screenshotter/images/LeftRightStyleSizing-chrome.png
index 161db47..3877e7e 100644
Binary files a/test/screenshotter/images/LeftRightStyleSizing-chrome.png and b/test/screenshotter/images/LeftRightStyleSizing-chrome.png differ
diff --git a/test/screenshotter/images/LeftRightStyleSizing-firefox.png b/test/screenshotter/images/LeftRightStyleSizing-firefox.png
index 72135ca..e343259 100644
Binary files a/test/screenshotter/images/LeftRightStyleSizing-firefox.png and b/test/screenshotter/images/LeftRightStyleSizing-firefox.png differ
diff --git a/test/screenshotter/images/Rule-chrome.png b/test/screenshotter/images/Rule-chrome.png
index a87f86c..0fcfa44 100644
Binary files a/test/screenshotter/images/Rule-chrome.png and b/test/screenshotter/images/Rule-chrome.png differ
diff --git a/test/screenshotter/images/Rule-firefox.png b/test/screenshotter/images/Rule-firefox.png
index a87f86c..0fcfa44 100644
Binary files a/test/screenshotter/images/Rule-firefox.png and b/test/screenshotter/images/Rule-firefox.png differ