diff --git a/src/Builder/ResponseBuilder.php b/src/Builder/ResponseBuilder.php
index e6933a0..de2e882 100644
--- a/src/Builder/ResponseBuilder.php
+++ b/src/Builder/ResponseBuilder.php
@@ -104,7 +104,7 @@ public function setHeadersFromString($headers)
     public function setStatus($statusLine)
     {
         $parts = explode(' ', $statusLine, 3);
-        if (count($parts) < 2 || strpos(strtolower($parts[0]), 'http/') !== 0) {
+        if (count($parts) < 2 || 0 !== strpos(strtolower($parts[0]), 'http/')) {
             throw new \InvalidArgumentException(
                 sprintf('"%s" is not a valid HTTP status line', $statusLine)
             );
@@ -130,7 +130,7 @@ public function setStatus($statusLine)
     public function addHeader($headerLine)
     {
         $parts = explode(':', $headerLine, 2);
-        if (count($parts) !== 2) {
+        if (2 !== count($parts)) {
             throw new \InvalidArgumentException(
                 sprintf('"%s" is not a valid HTTP header line', $headerLine)
             );
diff --git a/src/Cookie.php b/src/Cookie.php
index 5f61b90..962ac72 100644
--- a/src/Cookie.php
+++ b/src/Cookie.php
@@ -295,7 +295,7 @@ public function withDomain($domain)
     public function matchDomain($domain)
     {
         // Domain is not set or exact match
-        if (!$this->hasDomain() || strcasecmp($domain, $this->domain) === 0) {
+        if (!$this->hasDomain() || 0 === strcasecmp($domain, $this->domain)) {
             return true;
         }
 
@@ -343,7 +343,7 @@ public function withPath($path)
      */
     public function matchPath($path)
     {
-        return $this->path === $path || (strpos($path, rtrim($this->path, '/').'/') === 0);
+        return $this->path === $path || (0 === strpos($path, rtrim($this->path, '/').'/'));
     }
 
     /**
@@ -405,7 +405,7 @@ public function withHttpOnly($httpOnly)
      *
      * @return bool
      */
-    public function match(Cookie $cookie)
+    public function match(self $cookie)
     {
         return $this->name === $cookie->name && $this->domain === $cookie->domain and $this->path === $cookie->path;
     }
@@ -517,7 +517,7 @@ private function normalizePath($path)
     {
         $path = rtrim($path, '/');
 
-        if (empty($path) or substr($path, 0, 1) !== '/') {
+        if (empty($path) or '/' !== substr($path, 0, 1)) {
             $path = '/';
         }
 
diff --git a/src/Encoding/FilteredStream.php b/src/Encoding/FilteredStream.php
index a32554b..4b296ed 100644
--- a/src/Encoding/FilteredStream.php
+++ b/src/Encoding/FilteredStream.php
@@ -98,7 +98,7 @@ public function read($length)
      */
     public function eof()
     {
-        return $this->stream->eof() && $this->buffer === '';
+        return $this->stream->eof() && '' === $this->buffer;
     }
 
     /**
@@ -128,7 +128,7 @@ public function getContents()
         while (!$this->eof()) {
             $buf = $this->read(self::BUFFER_SIZE);
             // Using a loose equality here to match on '' and false.
-            if ($buf == null) {
+            if (null == $buf) {
                 break;
             }
 
diff --git a/src/Formatter/CurlCommandFormatter.php b/src/Formatter/CurlCommandFormatter.php
index a0fe7e5..f0375fd 100644
--- a/src/Formatter/CurlCommandFormatter.php
+++ b/src/Formatter/CurlCommandFormatter.php
@@ -19,9 +19,9 @@ class CurlCommandFormatter implements Formatter
     public function formatRequest(RequestInterface $request)
     {
         $command = sprintf('curl %s', escapeshellarg((string) $request->getUri()->withFragment('')));
-        if ($request->getProtocolVersion() === '1.0') {
+        if ('1.0' === $request->getProtocolVersion()) {
             $command .= ' --http1.0';
-        } elseif ($request->getProtocolVersion() === '2.0') {
+        } elseif ('2.0' === $request->getProtocolVersion()) {
             $command .= ' --http2';
         }
 
@@ -69,6 +69,7 @@ private function getHeadersAsCommandOptions(RequestInterface $request)
 
             if ('user-agent' === strtolower($name)) {
                 $command .= sprintf(' -A %s', escapeshellarg($values[0]));
+
                 continue;
             }
 
diff --git a/src/Formatter/FullHttpMessageFormatter.php b/src/Formatter/FullHttpMessageFormatter.php
index 3fa1029..1918c59 100644
--- a/src/Formatter/FullHttpMessageFormatter.php
+++ b/src/Formatter/FullHttpMessageFormatter.php
@@ -78,7 +78,7 @@ public function formatResponse(ResponseInterface $response)
     private function addBody(MessageInterface $request, $message)
     {
         $stream = $request->getBody();
-        if (!$stream->isSeekable() || $this->maxBodyLength === 0) {
+        if (!$stream->isSeekable() || 0 === $this->maxBodyLength) {
             // Do not read the stream
             $message .= "\n";
         } else {