diff --git a/src/OpenApi/Factory/OpenApiFactory.php b/src/OpenApi/Factory/OpenApiFactory.php
index def0641ad8..2d32100b11 100644
--- a/src/OpenApi/Factory/OpenApiFactory.php
+++ b/src/OpenApi/Factory/OpenApiFactory.php
@@ -369,52 +369,46 @@ private function collectPaths(ApiResource $resource, ResourceMetadataCollection
                     $defaultSchema['default'] = $p->getDefault();
                 }
 
-                $parameterSchema = $p->getSchema() ?? $defaultSchema;
-                $castToArray = $p->getCastToArray();
-                $parameterDescription = $p->getDescription() ?? "$resourceShortName $key";
-                $parameterRequired = $p->getRequired() ?? false;
+                $defaultParameter = new Parameter(
+                    $key,
+                    $in,
+                    $p->getDescription() ?? "$resourceShortName $key",
+                    $p->getRequired() ?? false,
+                    false,
+                    null,
+                    $p->getSchema() ?? $defaultSchema,
+                );
+
                 $linkParameter = $p->getOpenApi();
-                $canSplitToArray = null === $linkParameter && 'query' === $in && 'array' === ($parameterSchema['type'] ?? null);
+                if (null === $linkParameter) {
+                    if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $defaultParameter)) {
+                        $openapiParameters[$i] = $this->mergeParameter($defaultParameter, $operationParameter);
+                    } else {
+                        $openapiParameters[] = $defaultParameter;
+                    }
 
-                $defaultParameters = [];
-                if (!$canSplitToArray || true !== $castToArray) {
-                    $defaultParameters[] = new Parameter($key, $in, $parameterDescription, $parameterRequired, false, null, $parameterSchema);
-                }
-                if ($canSplitToArray && false !== $castToArray) {
-                    $defaultParameters[] = new Parameter($key.'[]', $in, $parameterDescription, $parameterRequired, false, null, $parameterSchema, 'deepObject', true);
+                    continue;
                 }
 
-                foreach ($defaultParameters as $defaultParameter) {
-                    if (null === $linkParameter) {
-                        if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $defaultParameter)) {
-                            $openapiParameters[$i] = $this->mergeParameter($defaultParameter, $operationParameter);
-                        } else {
-                            $openapiParameters[] = $defaultParameter;
+                if (\is_array($linkParameter)) {
+                    foreach ($linkParameter as $lp) {
+                        $parameter = $this->mergeParameter($defaultParameter, $lp);
+                        if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $parameter)) {
+                            $openapiParameters[$i] = $this->mergeParameter($parameter, $operationParameter);
+                            continue;
                         }
 
-                        continue;
-                    }
-
-                    if (\is_array($linkParameter)) {
-                        foreach ($linkParameter as $lp) {
-                            $parameter = $this->mergeParameter($defaultParameter, $lp);
-                            if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $parameter)) {
-                                $openapiParameters[$i] = $this->mergeParameter($parameter, $operationParameter);
-                                continue;
-                            }
-
-                            $openapiParameters[] = $parameter;
-                        }
-                        continue;
+                        $openapiParameters[] = $parameter;
                     }
+                    continue;
+                }
 
-                    $parameter = $this->mergeParameter($defaultParameter, $linkParameter);
-                    if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $parameter)) {
-                        $openapiParameters[$i] = $this->mergeParameter($parameter, $operationParameter);
-                        continue;
-                    }
-                    $openapiParameters[] = $parameter;
+                $parameter = $this->mergeParameter($defaultParameter, $linkParameter);
+                if ([$i, $operationParameter] = $this->hasParameter($openapiOperation, $parameter)) {
+                    $openapiParameters[$i] = $this->mergeParameter($parameter, $operationParameter);
+                    continue;
                 }
+                $openapiParameters[] = $parameter;
             }
 
             $openapiOperation = $openapiOperation->withParameters($openapiParameters);
diff --git a/src/OpenApi/Tests/Factory/OpenApiFactoryTest.php b/src/OpenApi/Tests/Factory/OpenApiFactoryTest.php
index 52df5843d1..9c37de8bfe 100644
--- a/src/OpenApi/Tests/Factory/OpenApiFactoryTest.php
+++ b/src/OpenApi/Tests/Factory/OpenApiFactoryTest.php
@@ -1606,128 +1606,6 @@ public function testStringFilterFanOutWithNoMatchLeavesGeneratedParametersUntouc
         $this->assertSame('', $this->getParameterByName($parameters, 'description')->getDescription());
     }
 
-    public function testFilterlessArrayQueryParameterHonoursCastToArray(): void
-    {
-        $resourceNameCollectionFactory = $this->createMock(ResourceNameCollectionFactoryInterface::class);
-        $resourceCollectionMetadataFactory = $this->createMock(ResourceMetadataCollectionFactoryInterface::class);
-        $propertyNameCollectionFactory = $this->createMock(PropertyNameCollectionFactoryInterface::class);
-        $propertyMetadataFactory = $this->createMock(PropertyMetadataFactoryInterface::class);
-        $definitionNameFactory = new DefinitionNameFactory([]);
-
-        $arraySchema = ['type' => 'array', 'items' => ['type' => 'string']];
-
-        $resourceCollectionMetadata = new ResourceMetadataCollection(Dummy::class, [(new ApiResource(operations: [
-            'castTrue' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('cast_true')
-                ->withUriTemplate('/cast-true')
-                ->withParameters(['ids' => new QueryParameter(key: 'ids', schema: $arraySchema, castToArray: true)]),
-            'castFalse' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('cast_false')
-                ->withUriTemplate('/cast-false')
-                ->withParameters(['ids' => new QueryParameter(key: 'ids', schema: $arraySchema, castToArray: false)]),
-            'castNull' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('cast_null')
-                ->withUriTemplate('/cast-null')
-                ->withParameters(['ids' => new QueryParameter(key: 'ids', schema: $arraySchema)]),
-            'scalarQuery' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('scalar_query')
-                ->withUriTemplate('/scalar-query')
-                ->withParameters(['name' => new QueryParameter(key: 'name', schema: ['type' => 'string'])]),
-            'arrayHeader' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('array_header')
-                ->withUriTemplate('/array-header')
-                ->withParameters(['ids' => new HeaderParameter(key: 'ids', schema: $arraySchema)]),
-            'linkParameterGuard' => (new GetCollection(paginationEnabled: false))
-                ->withClass(Dummy::class)
-                ->withShortName('Dummy')
-                ->withName('link_parameter_guard')
-                ->withUriTemplate('/link-parameter-guard')
-                ->withParameters(['foobar' => new QueryParameter(key: 'foobar', schema: $arraySchema, openApi: [
-                    new Parameter(name: 'foobar', in: 'query', schema: $arraySchema),
-                    new Parameter(name: 'foobar[]', in: 'query', style: 'deepObject', explode: true, schema: $arraySchema),
-                ])]),
-        ]))->withClass(Dummy::class)]);
-
-        $resourceCollectionMetadataFactory
-            ->method('create')
-            ->willReturnCallback(static fn (string $resourceClass): ResourceMetadataCollection => match ($resourceClass) {
-                default => new ResourceMetadataCollection($resourceClass, []),
-                Dummy::class => $resourceCollectionMetadata,
-            });
-
-        $resourceNameCollectionFactory->method('create')->willReturn(new ResourceNameCollection([Dummy::class]));
-
-        $propertyNameCollectionFactory->method('create')->willReturn(new PropertyNameCollection([]));
-
-        $schemaFactory = new SchemaFactory(
-            resourceMetadataFactory: $resourceCollectionMetadataFactory,
-            propertyNameCollectionFactory: $propertyNameCollectionFactory,
-            propertyMetadataFactory: $propertyMetadataFactory,
-            nameConverter: new CamelCaseToSnakeCaseNameConverter(),
-            definitionNameFactory: $definitionNameFactory,
-        );
-
-        $factory = new OpenApiFactory(
-            $resourceNameCollectionFactory,
-            $resourceCollectionMetadataFactory,
-            $propertyNameCollectionFactory,
-            $propertyMetadataFactory,
-            $schemaFactory,
-            null,
-            [],
-            new Options('Test API', 'This is a test API.', '1.2.3'),
-            new PaginationOptions(),
-            null,
-            ['json' => ['application/problem+json']]
-        );
-
-        $openApi = $factory->__invoke();
-
-        $castTrueParameters = $openApi->getPaths()->getPath('/cast-true')->getGet()->getParameters();
-        $this->assertCount(1, $castTrueParameters);
-        $this->assertSame('ids[]', $castTrueParameters[0]->getName());
-        $this->assertTrue($castTrueParameters[0]->canExplode());
-        $this->assertSame('deepObject', $castTrueParameters[0]->getStyle());
-        $this->assertSame($arraySchema, $castTrueParameters[0]->getSchema());
-
-        $castFalseParameters = $openApi->getPaths()->getPath('/cast-false')->getGet()->getParameters();
-        $this->assertCount(1, $castFalseParameters);
-        $this->assertSame('ids', $castFalseParameters[0]->getName());
-        $this->assertSame($arraySchema, $castFalseParameters[0]->getSchema());
-
-        $castNullParameters = $openApi->getPaths()->getPath('/cast-null')->getGet()->getParameters();
-        $this->assertCount(2, $castNullParameters);
-        $this->assertSame('ids', $this->getParameterByName($castNullParameters, 'ids')->getName());
-        $this->assertSame('ids[]', $this->getParameterByName($castNullParameters, 'ids[]')->getName());
-        $this->assertTrue($this->getParameterByName($castNullParameters, 'ids[]')->canExplode());
-        $this->assertSame('deepObject', $this->getParameterByName($castNullParameters, 'ids[]')->getStyle());
-
-        $scalarQueryParameters = $openApi->getPaths()->getPath('/scalar-query')->getGet()->getParameters();
-        $this->assertCount(1, $scalarQueryParameters);
-        $this->assertSame('name', $scalarQueryParameters[0]->getName());
-        $this->assertSame(['type' => 'string'], $scalarQueryParameters[0]->getSchema());
-
-        $arrayHeaderParameters = $openApi->getPaths()->getPath('/array-header')->getGet()->getParameters();
-        $this->assertCount(1, $arrayHeaderParameters);
-        $this->assertSame('ids', $arrayHeaderParameters[0]->getName());
-        $this->assertSame('header', $arrayHeaderParameters[0]->getIn());
-        $this->assertSame($arraySchema, $arrayHeaderParameters[0]->getSchema());
-
-        $linkParameterGuardParameters = $openApi->getPaths()->getPath('/link-parameter-guard')->getGet()->getParameters();
-        $this->assertCount(1, array_filter($linkParameterGuardParameters, static fn (Parameter $parameter): bool => 'foobar' === $parameter->getName()));
-        $this->assertCount(1, array_filter($linkParameterGuardParameters, static fn (Parameter $parameter): bool => 'foobar[]' === $parameter->getName()));
-    }
-
     /**
      * @param Parameter[] $parameters
      */