diff --git a/src/Error/Debugger.php b/src/Error/Debugger.php
index f922b65de6d..210ecbaa09c 100644
--- a/src/Error/Debugger.php
+++ b/src/Error/Debugger.php
@@ -424,7 +424,7 @@ public static function excerpt($file, $line, $context = 2)
         if (!isset($data[$line])) {
             return $lines;
         }
-        $line = $line - 1;
+        --$line;
         for ($i = $line - $context; $i < $line + $context + 1; $i++) {
             if (!isset($data[$i])) {
                 continue;
diff --git a/src/I18n/RelativeTimeFormatter.php b/src/I18n/RelativeTimeFormatter.php
index 3fae54e1357..46d6ab3fe99 100644
--- a/src/I18n/RelativeTimeFormatter.php
+++ b/src/I18n/RelativeTimeFormatter.php
@@ -231,7 +231,7 @@ protected function _diffData($futureTime, $pastTime, $backwards, $options)
             }
 
             if ($months >= 12) {
-                $years = $years + 1;
+                ++$years;
                 $months = $months - 12;
             }
 
diff --git a/src/Utility/Hash.php b/src/Utility/Hash.php
index 685e460b619..7dd00b5eeda 100644
--- a/src/Utility/Hash.php
+++ b/src/Utility/Hash.php
@@ -819,7 +819,7 @@ public static function dimensions(array $data)
         $depth = 1;
         while ($elem = array_shift($data)) {
             if (is_array($elem)) {
-                $depth += 1;
+                ++$depth;
                 $data = $elem;
             } else {
                 break;