diff --git a/Magento2/Sniffs/Less/ColonSpacingSniff.php b/Magento2/Sniffs/Less/ColonSpacingSniff.php
index 505c44fd..6b68ea65 100644
--- a/Magento2/Sniffs/Less/ColonSpacingSniff.php
+++ b/Magento2/Sniffs/Less/ColonSpacingSniff.php
@@ -60,12 +60,13 @@ private function needValidateSpaces(File $phpcsFile, $stackPtr, $tokens)
             return false;
         }
 
-        $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
-        if ($tokens[$prev]['code'] !== T_STYLE) {
-            // The colon is not part of a style definition.
+        // Avoid false positives when parsing pseudo-classes
+        $next = $phpcsFile->findNext([T_SEMICOLON, T_OPEN_CURLY_BRACKET], $stackPtr + 1);
+        if ($tokens[$next]['code'] === T_OPEN_CURLY_BRACKET) {
             return false;
         }
 
+        $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
         if ($tokens[$prev]['content'] === 'progid') {
             // Special case for IE filters.
             return false;
diff --git a/Magento2/Tests/Less/ColonSpacingUnitTest.less b/Magento2/Tests/Less/ColonSpacingUnitTest.less
index 37de49e4..cd6a3fd3 100644
--- a/Magento2/Tests/Less/ColonSpacingUnitTest.less
+++ b/Magento2/Tests/Less/ColonSpacingUnitTest.less
@@ -5,22 +5,46 @@
 
 
 div#foo {
-  blah:'abc';
+    blah:'abc';
 }
 
 .my #foo .blah {
-  some:  'stuff';
+    some:  'stuff';
 }
 
 .blah {
-  foo :'jkl';
+    foo :'jkl';
 }
 
 .foo {
-  bar:
+    bar:
           'xyz';
 }
 
 .right {
-  way: 'good'
+    way: 'good';
+}
+
+a:active {
+    color: #000;
+}
+
+@abs-action-button-as-link: {
+    &:not(:focus) {
+        box-shadow: none;
+    }
+}
+
+.actions-toolbar {
+    &:not(:first-child) {
+        &:extend(.abs-add-clearfix all);
+            > .secondary {
+                .action {
+                    &.add {
+                        margin-top: @indent__l;
+                    }
+                }
+            float: left;
+        }
+    }
 }