diff --git a/.gitattributes b/.gitattributes
index ebb928704..84c7add05 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,4 @@
 /Tests export-ignore
 /phpunit.xml.dist export-ignore
+/.gitattributes export-ignore
 /.gitignore export-ignore
diff --git a/Output/StreamOutput.php b/Output/StreamOutput.php
index 0b24052e9..9b78f432a 100644
--- a/Output/StreamOutput.php
+++ b/Output/StreamOutput.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\Console\Output;
 
 use Symfony\Component\Console\Exception\InvalidArgumentException;
-use Symfony\Component\Console\Exception\RuntimeException;
 use Symfony\Component\Console\Formatter\OutputFormatterInterface;
 
 /**
@@ -74,10 +73,7 @@ protected function doWrite(string $message, bool $newline)
             $message .= PHP_EOL;
         }
 
-        if (false === @fwrite($this->stream, $message)) {
-            // should never happen
-            throw new RuntimeException('Unable to write output.');
-        }
+        @fwrite($this->stream, $message);
 
         fflush($this->stream);
     }
diff --git a/Tests/Fixtures/stream_output_file.txt b/Tests/Fixtures/stream_output_file.txt
new file mode 100644
index 000000000..e69de29bb
diff --git a/Tests/Output/StreamOutputTest.php b/Tests/Output/StreamOutputTest.php
index df4e3384a..8fa9dfd10 100644
--- a/Tests/Output/StreamOutputTest.php
+++ b/Tests/Output/StreamOutputTest.php
@@ -56,4 +56,12 @@ public function testDoWrite()
         rewind($output->getStream());
         $this->assertEquals('foo'.PHP_EOL, stream_get_contents($output->getStream()), '->doWrite() writes to the stream');
     }
+
+    public function testDoWriteOnFailure()
+    {
+        $resource = fopen(__DIR__.'/../Fixtures/stream_output_file.txt', 'r', false);
+        $output = new StreamOutput($resource);
+        rewind($output->getStream());
+        $this->assertEquals('', stream_get_contents($output->getStream()));
+    }
 }