diff --git a/lib/Twig/ExpressionParser.php b/lib/Twig/ExpressionParser.php
index 8b5749775..539390404 100644
--- a/lib/Twig/ExpressionParser.php
+++ b/lib/Twig/ExpressionParser.php
@@ -189,12 +189,13 @@ class Twig_ExpressionParser
                     break;
                 }
 
+                // no break
             default:
                 if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
                     $node = $this->parseArrayExpression();
                 } elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
                     $node = $this->parseHashExpression();
-                } elseif ($token->test(Twig_Token::OPERATOR_TYPE, '=') && ($this->parser->getStream()->look(-1)->getValue() === '==' || $this->parser->getStream()->look(-1)->getValue() === '!=')) {
+                } elseif ($token->test(Twig_Token::OPERATOR_TYPE, '=') && ('==' === $this->parser->getStream()->look(-1)->getValue() || '!=' === $this->parser->getStream()->look(-1)->getValue())) {
                     throw new Twig_Error_Syntax(sprintf('Unexpected operator of value "%s". Did you try to use "===" or "!==" for strict comparison? Use "is same as(value)" instead.', $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
                 } else {
                     throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
@@ -305,7 +306,7 @@ class Twig_ExpressionParser
     {
         while (true) {
             $token = $this->parser->getCurrentToken();
-            if ($token->getType() == Twig_Token::PUNCTUATION_TYPE) {
+            if (Twig_Token::PUNCTUATION_TYPE == $token->getType()) {
                 if ('.' == $token->getValue() || '[' == $token->getValue()) {
                     $node = $this->parseSubscriptExpression($node);
                 } elseif ('|' == $token->getValue()) {
@@ -376,14 +377,14 @@ class Twig_ExpressionParser
         $lineno = $token->getLine();
         $arguments = new Twig_Node_Expression_Array(array(), $lineno);
         $type = Twig_Template::ANY_CALL;
-        if ($token->getValue() == '.') {
+        if ('.' == $token->getValue()) {
             $token = $stream->next();
             if (
-                $token->getType() == Twig_Token::NAME_TYPE
+                Twig_Token::NAME_TYPE == $token->getType()
                 ||
-                $token->getType() == Twig_Token::NUMBER_TYPE
+                Twig_Token::NUMBER_TYPE == $token->getType()
                 ||
-                ($token->getType() == Twig_Token::OPERATOR_TYPE && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
+                (Twig_Token::OPERATOR_TYPE == $token->getType() && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
             ) {
                 $arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
 
diff --git a/lib/Twig/Extension/Core.php b/lib/Twig/Extension/Core.php
index c37a9fe3b..cdfa669c9 100644
--- a/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@ -579,7 +579,7 @@ function twig_slice(Twig_Environment $env, $item, $start, $length = null, $prese
 
         if ($start >= 0 && $length >= 0 && $item instanceof Iterator) {
             try {
-                return iterator_to_array(new LimitIterator($item, $start, $length === null ? -1 : $length), $preserveKeys);
+                return iterator_to_array(new LimitIterator($item, $start, null === $length ? -1 : $length), $preserveKeys);
             } catch (OutOfBoundsException $exception) {
                 return array();
             }
diff --git a/lib/Twig/Lexer.php b/lib/Twig/Lexer.php
index bac1cc82a..599c73bc6 100644
--- a/lib/Twig/Lexer.php
+++ b/lib/Twig/Lexer.php
@@ -210,7 +210,7 @@ class Twig_Lexer
             $this->moveCursor($match[0]);
 
             if ($this->cursor >= $this->end) {
-                throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $this->state === self::STATE_BLOCK ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source);
+                throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', self::STATE_BLOCK === $this->state ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source);
             }
         }
 
@@ -308,7 +308,7 @@ class Twig_Lexer
             $this->moveCursor($match[0]);
         } elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
             list($expect, $lineno) = array_pop($this->brackets);
-            if ($this->code[$this->cursor] != '"') {
+            if ('"' != $this->code[$this->cursor]) {
                 throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
             }
 
diff --git a/lib/Twig/Parser.php b/lib/Twig/Parser.php
index 323e942f0..d54572924 100644
--- a/lib/Twig/Parser.php
+++ b/lib/Twig/Parser.php
@@ -131,7 +131,7 @@ class Twig_Parser
                     $this->stream->next();
                     $token = $this->getCurrentToken();
 
-                    if ($token->getType() !== Twig_Token::NAME_TYPE) {
+                    if (Twig_Token::NAME_TYPE !== $token->getType()) {
                         throw new Twig_Error_Syntax('A block must start with a tag name.', $token->getLine(), $this->stream->getSourceContext());
                     }
 
diff --git a/lib/Twig/Profiler/Profile.php b/lib/Twig/Profiler/Profile.php
index 2177f6092..f81e52b95 100644
--- a/lib/Twig/Profiler/Profile.php
+++ b/lib/Twig/Profiler/Profile.php
@@ -80,7 +80,7 @@ class Twig_Profiler_Profile implements IteratorAggregate, Serializable
         return $this->profiles;
     }
 
-    public function addProfile(Twig_Profiler_Profile $profile)
+    public function addProfile(self $profile)
     {
         $this->profiles[] = $profile;
     }
diff --git a/lib/Twig/TokenParser/For.php b/lib/Twig/TokenParser/For.php
index 551d50086..41963a07e 100644
--- a/lib/Twig/TokenParser/For.php
+++ b/lib/Twig/TokenParser/For.php
@@ -38,7 +38,7 @@ final class Twig_TokenParser_For extends Twig_TokenParser
 
         $stream->expect(Twig_Token::BLOCK_END_TYPE);
         $body = $this->parser->subparse(array($this, 'decideForFork'));
-        if ($stream->next()->getValue() == 'else') {
+        if ('else' == $stream->next()->getValue()) {
             $stream->expect(Twig_Token::BLOCK_END_TYPE);
             $else = $this->parser->subparse(array($this, 'decideForEnd'), true);
         } else {
diff --git a/lib/Twig/TokenStream.php b/lib/Twig/TokenStream.php
index c32180ca9..539d0d5a2 100644
--- a/lib/Twig/TokenStream.php
+++ b/lib/Twig/TokenStream.php
@@ -123,7 +123,7 @@ final class Twig_TokenStream
      */
     public function isEOF()
     {
-        return $this->tokens[$this->current]->getType() === Twig_Token::EOF_TYPE;
+        return Twig_Token::EOF_TYPE === $this->tokens[$this->current]->getType();
     }
 
     /**
diff --git a/test/Twig/Tests/Extension/SandboxTest.php b/test/Twig/Tests/Extension/SandboxTest.php
index 122afc4ff..10f83bd63 100644
--- a/test/Twig/Tests/Extension/SandboxTest.php
+++ b/test/Twig/Tests/Extension/SandboxTest.php
@@ -251,7 +251,7 @@ EOF
             $twig->loadTemplate('1_include')->render(self::$params);
         } catch (Throwable $e) {
         }
-        if ($e === null) {
+        if (null === $e) {
             $this->fail('An exception should be thrown for this test to be valid.');
         }
 
diff --git a/test/Twig/Tests/IntegrationTest.php b/test/Twig/Tests/IntegrationTest.php
index f512b1070..027180f12 100644
--- a/test/Twig/Tests/IntegrationTest.php
+++ b/test/Twig/Tests/IntegrationTest.php
@@ -311,7 +311,7 @@ class CountableStub implements \Countable
 }
 
 /**
- * This class is used in tests for the length filter
+ * This class is used in tests for the length filter.
  */
 class IteratorAggregateStub implements \IteratorAggregate
 {