diff --git a/src/Analysis/Relations/InheritanceResolver.php b/src/Analysis/Relations/InheritanceResolver.php
index 78dea125a7707547873d2570c20483741f89c84a..7116a3798c53c21c484301991067d835e3d6f1d8 100644
--- a/src/Analysis/Relations/InheritanceResolver.php
+++ b/src/Analysis/Relations/InheritanceResolver.php
@@ -17,11 +17,11 @@ final class InheritanceResolver extends AbstractResolver
      */
     public function resolveInheritanceOf(ArrayObject $parent, ArrayObject $class): void
     {
-        if (!$class['shortDescription']) {
+        if ($class['shortDescription'] === '' || $class['shortDescription'] === null) {
             $class['shortDescription'] = $parent['shortDescription'];
         }
 
-        if (!$class['longDescription']) {
+        if ($class['longDescription'] === '' || $class['longDescription'] === null) {
             $class['longDescription'] = $parent['longDescription'];
         } elseif ($class['longDescription'] !== null && $parent['longDescription'] !== null) {
             $class['longDescription'] = $this->resolveInheritDoc($class['longDescription'], $parent['longDescription']);
diff --git a/src/Autocompletion/FunctionAutocompletionSuggestionLabelCreator.php b/src/Autocompletion/FunctionAutocompletionSuggestionLabelCreator.php
index 68135879a458cd87fd649408b7b934c481780f01..d5fbf38145f4e1a0c1859115ed5bcdf6fca2d18f 100644
--- a/src/Autocompletion/FunctionAutocompletionSuggestionLabelCreator.php
+++ b/src/Autocompletion/FunctionAutocompletionSuggestionLabelCreator.php
@@ -39,7 +39,7 @@ final class FunctionAutocompletionSuggestionLabelCreator
 
             $description .= '$' . $param['name'];
 
-            if ($param['defaultValue']) {
+            if ($param['defaultValue'] !== '' && $param['defaultValue'] !== null) {
                 $description .= ' = ' . $param['defaultValue'];
             }
 
diff --git a/src/Indexing/Visiting/ClasslikeIndexingVisitor.php b/src/Indexing/Visiting/ClasslikeIndexingVisitor.php
index 1ec8f8387bc9f5af6d68dda40ba098b081a20c58..8d388080399a4bd29d00163de706fd62315f4b02 100644
--- a/src/Indexing/Visiting/ClasslikeIndexingVisitor.php
+++ b/src/Indexing/Visiting/ClasslikeIndexingVisitor.php
@@ -647,7 +647,7 @@ final class ClasslikeIndexingVisitor extends NodeVisitorAbstract
                 }
 
                 $typeStringSpecification = $varDocumentation['type'];
-            } elseif ($property->default) {
+            } elseif ($property->default !== '' && $property->default !== null) {
                 $typeList = $this->nodeTypeDeducer->deduce(new TypeDeductionContext(
                     $property->default,
                     $this->textDocumentItem
diff --git a/src/Parsing/DocblockParser.php b/src/Parsing/DocblockParser.php
index 74f2186c49e844740873aac55aab76a45c4055e2..ff3bb567330ba2c815aafaf2e3c556d2a08684bd 100644
--- a/src/Parsing/DocblockParser.php
+++ b/src/Parsing/DocblockParser.php
@@ -680,7 +680,7 @@ class DocblockParser
                                 'defaultValue' => $defaultValue,
                             ];
 
-                            if (!$defaultValue) {
+                            if ($defaultValue === '' || $defaultValue === null) {
                                 $requiredParameters[$parameterName] = $data;
                             } else {
                                 $optionalParameters[$parameterName] = $data;
diff --git a/src/Tooltips/ClassLikeTooltipGenerator.php b/src/Tooltips/ClassLikeTooltipGenerator.php
index 001fade38c4d0f61df9375409f5197a78af85f1f..6dd2bb5ec65b924d01d3c2c54a4ca28a51c5ee80 100644
--- a/src/Tooltips/ClassLikeTooltipGenerator.php
+++ b/src/Tooltips/ClassLikeTooltipGenerator.php
@@ -33,7 +33,7 @@ class ClassLikeTooltipGenerator
      */
     private function generateSummary(array $info): string
     {
-        if ($info['shortDescription']) {
+        if ($info['shortDescription'] !== '' && $info['shortDescription'] !== null) {
             return $info['shortDescription'];
         }
 
diff --git a/src/Tooltips/ConstantTooltipGenerator.php b/src/Tooltips/ConstantTooltipGenerator.php
index 2890c4134e281be1cdf46a04eb9962d9adf9f869..fde79f500dc038efadbc76786cb935d25f4ef648 100644
--- a/src/Tooltips/ConstantTooltipGenerator.php
+++ b/src/Tooltips/ConstantTooltipGenerator.php
@@ -43,7 +43,7 @@ class ConstantTooltipGenerator
      */
     private function generateSummary(array $info): string
     {
-        if ($info['shortDescription']) {
+        if ($info['shortDescription'] !== '' && $info['shortDescription'] !== null) {
             return $info['shortDescription'];
         }
 
@@ -80,7 +80,7 @@ class ConstantTooltipGenerator
 
             $returnDescription = '*' . $value . '*';
 
-            if ($info['typeDescription']) {
+            if ($info['typeDescription'] !== '' && $info['typeDescription'] !== null) {
                 $returnDescription .= ' — ' . $info['typeDescription'];
             }
         } else {
diff --git a/src/Tooltips/FunctionTooltipGenerator.php b/src/Tooltips/FunctionTooltipGenerator.php
index 5dfb158edc8840ad2b5b4a52d58520344ca9d236..eeb04adb2e4009903dab5750c86258a8e8321b34 100644
--- a/src/Tooltips/FunctionTooltipGenerator.php
+++ b/src/Tooltips/FunctionTooltipGenerator.php
@@ -58,7 +58,7 @@ class FunctionTooltipGenerator
      */
     private function generateSummary(array $functionInfo): string
     {
-        if ($functionInfo['shortDescription']) {
+        if ($functionInfo['shortDescription'] !== '' && $functionInfo['shortDescription'] !== null) {
             return $functionInfo['shortDescription'];
         }
 
@@ -130,7 +130,7 @@ class FunctionTooltipGenerator
 
         $text .= "\n";
 
-        if ($parameter['description']) {
+        if ($parameter['description'] !== '' &&$parameter['description'] !== null) {
             $text .= ($parameter['description']);
         } else {
             $text .= '(No documentation available)';
@@ -155,7 +155,7 @@ class FunctionTooltipGenerator
 
             $returnDescription = '*' . $value . '*';
 
-            if ($functionInfo['returnDescription']) {
+            if ($functionInfo['returnDescription'] !== '' && $functionInfo['returnDescription'] !== null) {
                 $returnDescription .= ' — ' . $functionInfo['returnDescription'];
             }
         } else {
@@ -179,7 +179,7 @@ class FunctionTooltipGenerator
 
             $text = "#### • **{$type}**\n";
 
-            if ($throwsItem['description']) {
+            if ($throwsItem['description'] !== '' && $throwsItem['description'] !== null) {
                 $text .= $throwsItem['description'];
             } else {
                 $text .= '(No context available)';
diff --git a/src/Tooltips/PropertyTooltipGenerator.php b/src/Tooltips/PropertyTooltipGenerator.php
index e5564be20a49fb615883e35a593d7ab8a9e1fbb5..c1e251d813a954ca72f94948e58428ff0f4a349d 100644
--- a/src/Tooltips/PropertyTooltipGenerator.php
+++ b/src/Tooltips/PropertyTooltipGenerator.php
@@ -43,7 +43,7 @@ class PropertyTooltipGenerator
      */
     private function generateSummary(array $info): string
     {
-        if ($info['shortDescription']) {
+        if ($info['shortDescription'] !== '' && $info['shortDescription'] !== null) {
             return $info['shortDescription'];
         }
 
@@ -80,7 +80,7 @@ class PropertyTooltipGenerator
 
             $returnDescription = '*' . $value . '*';
 
-            if ($info['typeDescription']) {
+            if ($info['typeDescription'] !== '' && $info['typeDescription'] !== null) {
                 $returnDescription .= ' — ' . $info['typeDescription'];
             }
         } else {
diff --git a/tests/Integration/Autocompletion/Providers/FunctionAutocompletionProviderTest.php b/tests/Integration/Autocompletion/Providers/FunctionAutocompletionProviderTest.php
index 6eb5330d722ddd0c1e91d704b2618216f04b55a0..5f9ea5f588f396f782b3d625f68378e4bc611072 100644
--- a/tests/Integration/Autocompletion/Providers/FunctionAutocompletionProviderTest.php
+++ b/tests/Integration/Autocompletion/Providers/FunctionAutocompletionProviderTest.php
@@ -159,7 +159,7 @@ class FunctionAutocompletionProviderTest extends AbstractAutocompletionProviderT
                     ),
                     'foo()$0'
                 ),
-                'foo([$i])',
+                'foo([$i = 0])',
                 null,
                 [
                     'returnTypes'  => 'mixed',
diff --git a/tests/Integration/Autocompletion/Providers/NonStaticMethodAutocompletionProviderTest.php b/tests/Integration/Autocompletion/Providers/NonStaticMethodAutocompletionProviderTest.php
index cee29e5868b26f419fbaf071bc5d35f48233f65f..2c86eb1040b4468fd9abc30282ebed47688d8d90 100644
--- a/tests/Integration/Autocompletion/Providers/NonStaticMethodAutocompletionProviderTest.php
+++ b/tests/Integration/Autocompletion/Providers/NonStaticMethodAutocompletionProviderTest.php
@@ -177,7 +177,7 @@ class NonStaticMethodAutocompletionProviderTest extends AbstractAutocompletionPr
                     ),
                     'foo()$0'
                 ),
-                'foo([$i])',
+                'foo([$i = 0])',
                 null,
                 [
                     'protectionLevel'    => 'public',
diff --git a/tests/Integration/Autocompletion/Providers/StaticMethodAutocompletionProviderTest.php b/tests/Integration/Autocompletion/Providers/StaticMethodAutocompletionProviderTest.php
index 1d3ea8ec7791da737641c15208a28d123e2f53aa..70123563ea487a98a141f1fe44e0e6021aaf403a 100644
--- a/tests/Integration/Autocompletion/Providers/StaticMethodAutocompletionProviderTest.php
+++ b/tests/Integration/Autocompletion/Providers/StaticMethodAutocompletionProviderTest.php
@@ -177,7 +177,7 @@ class StaticMethodAutocompletionProviderTest extends AbstractAutocompletionProvi
                     ),
                     'foo()$0'
                 ),
-                'foo([$i])',
+                'foo([$i = 0])',
                 null,
                 [
                     'protectionLevel'    => 'public',