diff --git a/EventListener/ErrorListener.php b/EventListener/ErrorListener.php
index 212ad1d96..783c10793 100644
--- a/EventListener/ErrorListener.php
+++ b/EventListener/ErrorListener.php
@@ -40,7 +40,9 @@ public function onConsoleError(ConsoleErrorEvent $event)
         $error = $event->getError();
 
         if (!$inputString = $this->getInputString($event)) {
-            return $this->logger->error('An error occurred while using the console. Message: "{message}"', ['exception' => $error, 'message' => $error->getMessage()]);
+            $this->logger->error('An error occurred while using the console. Message: "{message}"', ['exception' => $error, 'message' => $error->getMessage()]);
+
+            return;
         }
 
         $this->logger->error('Error thrown while running command "{command}". Message: "{message}"', ['exception' => $error, 'command' => $inputString, 'message' => $error->getMessage()]);
@@ -59,7 +61,9 @@ public function onConsoleTerminate(ConsoleTerminateEvent $event)
         }
 
         if (!$inputString = $this->getInputString($event)) {
-            return $this->logger->debug('The console exited with code "{code}"', ['code' => $exitCode]);
+            $this->logger->debug('The console exited with code "{code}"', ['code' => $exitCode]);
+
+            return;
         }
 
         $this->logger->debug('Command "{command}" exited with code "{code}"', ['command' => $inputString, 'code' => $exitCode]);
diff --git a/Input/ArgvInput.php b/Input/ArgvInput.php
index cc1f6079e..b0c167d69 100644
--- a/Input/ArgvInput.php
+++ b/Input/ArgvInput.php
@@ -288,6 +288,8 @@ public function getFirstArgument()
 
             return $token;
         }
+
+        return null;
     }
 
     /**
diff --git a/Input/ArrayInput.php b/Input/ArrayInput.php
index 9f8f93a65..a04b6b68e 100644
--- a/Input/ArrayInput.php
+++ b/Input/ArrayInput.php
@@ -46,6 +46,8 @@ public function getFirstArgument()
 
             return $value;
         }
+
+        return null;
     }
 
     /**
diff --git a/Style/SymfonyStyle.php b/Style/SymfonyStyle.php
index e0ced01b2..4291ada8f 100644
--- a/Style/SymfonyStyle.php
+++ b/Style/SymfonyStyle.php
@@ -355,7 +355,9 @@ private function autoPrependBlock()
         $chars = substr(str_replace(PHP_EOL, "\n", $this->bufferedOutput->fetch()), -2);
 
         if (!isset($chars[0])) {
-            return $this->newLine(); //empty history, so we should start with a new line.
+            $this->newLine(); //empty history, so we should start with a new line.
+
+            return;
         }
         //Prepend new line for each non LF chars (This means no blank line was output before)
         $this->newLine(2 - substr_count($chars, "\n"));