diff --git a/lib/Less/Tree/Quoted.php b/lib/Less/Tree/Quoted.php
index 2b67e868..b78b85e5 100644
--- a/lib/Less/Tree/Quoted.php
+++ b/lib/Less/Tree/Quoted.php
@@ -45,17 +45,20 @@ public function compile( $env ) {
 				$value = str_replace( $matches[0][$i], $js, $value );
 			}
 		}
-
-		if ( preg_match_all( '/@\{([\w-]+)\}/', $value, $matches ) ) {
-			foreach ( $matches[1] as $i => $match ) {
-				$v = new Less_Tree_Variable( '@' . $match, $this->index, $this->currentFileInfo );
-				$v = $v->compile( $env );
-				$v = ( $v instanceof self ) ? $v->value : $v->toCSS();
-				$value = str_replace( $matches[0][$i], $v, $value );
+		$r = $value;
+		do{
+			$value = $r;
+			if ( preg_match_all( '/@\{([\w-]+)\}/', $value, $matches ) ) {
+				foreach ( $matches[1] as $i => $match ) {
+					$v = new Less_Tree_Variable( '@' . $match, $this->index, $this->currentFileInfo );
+					$v = $v->compile( $env );
+					$v = ( $v instanceof self ) ? $v->value : $v->toCSS();
+					$r = str_replace( $matches[0][$i], $v, $r );
+				}
 			}
-		}
+		}while ( $r != $value );
 
-		return new self( $this->quote . $value . $this->quote, $value, $this->escaped, $this->index, $this->currentFileInfo );
+		return new self( $this->quote . $r . $this->quote, $r, $this->escaped, $this->index, $this->currentFileInfo );
 	}
 
 	public function compare( $x ) {
diff --git a/lib/Less/Tree/Selector.php b/lib/Less/Tree/Selector.php
index d1307a56..64390542 100644
--- a/lib/Less/Tree/Selector.php
+++ b/lib/Less/Tree/Selector.php
@@ -101,14 +101,13 @@ public function CacheElements() {
 				$css .= $v->value;
 				continue;
 			}
-
-			if (
-				( $v->value instanceof Less_Tree_Selector || $v->value instanceof Less_Tree_Variable )
+			if ( ( $v->value instanceof Less_Tree_Selector || $v->value instanceof Less_Tree_Variable )
 				|| !is_string( $v->value->value ) ) {
 				$this->cacheable = false;
-				return;
 			}
-			$css .= $v->value->value;
+			if ( isset( $v->value->value ) && !is_object( $v->value->value ) ) {
+				$css .= $v->value->value;
+			}
 		}
 
 		$this->_oelements_len = preg_match_all( '/[,&#\*\.\w-](?:[\w-]|(?:\\\\.))*/', $css, $matches );
diff --git a/test/phpunit/FixturesTest.php b/test/phpunit/FixturesTest.php
index 93375c3b..aff8e049 100644
--- a/test/phpunit/FixturesTest.php
+++ b/test/phpunit/FixturesTest.php
@@ -41,8 +41,7 @@ class phpunit_FixturesTest extends phpunit_bootstrap {
 			'css-3' => true,
 			'import-reference' => true,
 
-			// Temporary disabled; Bug logged T353133
-			'strings' => true,
+			// TODO; Create Task for import-interpolation
 			'import-interpolation' => true,
 
 			// Temporary disabled; Bug logged here T352897
@@ -73,8 +72,6 @@ class phpunit_FixturesTest extends phpunit_bootstrap {
 			// behaviour of doing maths in parentheses by default
 			'parens' => true,
 
-			// Temporary disabled; Bug logged T353142
-			'mixins-interpolated' => true,
 			// Temporary disabled; Bug logged T353143
 			'detached-rulesets' => true,
 		]