--- /dev/null
+--TEST--
+Merge selectors optimization
+--CSS--
+h1 {display: inherit;}
+h2 {display: inherit;}
+h3 {display: inherit;}
+--EXPECT--
+array (
+ 'h1,h2,h3' =>
+ array (
+ 'display' => 'inherit',
+ ),
+)
+--SETTINGS--
+merge_selectors=2
\ No newline at end of file