diff --git a/Descriptor/TextDescriptor.php b/Descriptor/TextDescriptor.php
index ccfbd6d36..16ab3eb55 100644
--- a/Descriptor/TextDescriptor.php
+++ b/Descriptor/TextDescriptor.php
@@ -117,7 +117,7 @@ protected function describeInputDefinition(InputDefinition $definition, array $o
 
             $this->writeText('<comment>Options:</comment>', $options);
             foreach ($definition->getOptions() as $option) {
-                if (\strlen($option->getShortcut()) > 1) {
+                if (\strlen($option->getShortcut() ?? '') > 1) {
                     $laterOptions[] = $option;
                     continue;
                 }
diff --git a/Descriptor/XmlDescriptor.php b/Descriptor/XmlDescriptor.php
index 4931fba62..5323a3ba8 100644
--- a/Descriptor/XmlDescriptor.php
+++ b/Descriptor/XmlDescriptor.php
@@ -200,7 +200,7 @@ private function getInputOptionDocument(InputOption $option): \DOMDocument
 
         $dom->appendChild($objectXML = $dom->createElement('option'));
         $objectXML->setAttribute('name', '--'.$option->getName());
-        $pos = strpos($option->getShortcut(), '|');
+        $pos = strpos($option->getShortcut() ?? '', '|');
         if (false !== $pos) {
             $objectXML->setAttribute('shortcut', '-'.substr($option->getShortcut(), 0, $pos));
             $objectXML->setAttribute('shortcuts', '-'.str_replace('|', '|-', $option->getShortcut()));
diff --git a/Helper/ProgressIndicator.php b/Helper/ProgressIndicator.php
index 491a537eb..2d8774201 100644
--- a/Helper/ProgressIndicator.php
+++ b/Helper/ProgressIndicator.php
@@ -185,7 +185,7 @@ private function display()
             }
 
             return $matches[0];
-        }, $this->format));
+        }, $this->format ?? ''));
     }
 
     private function determineBestFormat(): string
diff --git a/Helper/Table.php b/Helper/Table.php
index ee969bcff..9662f4e75 100644
--- a/Helper/Table.php
+++ b/Helper/Table.php
@@ -572,7 +572,7 @@ private function buildTableRows(array $rows): TableRows
                 if (isset($this->columnMaxWidths[$column]) && Helper::strlenWithoutDecoration($formatter, $cell) > $this->columnMaxWidths[$column]) {
                     $cell = $formatter->formatAndWrap($cell, $this->columnMaxWidths[$column] * $colspan);
                 }
-                if (!strstr($cell, "\n")) {
+                if (!strstr($cell ?? '', "\n")) {
                     continue;
                 }
                 $escaped = implode("\n", array_map([OutputFormatter::class, 'escapeTrailingBackslash'], explode("\n", $cell)));