diff --git a/src/Services/SwaggerService.php b/src/Services/SwaggerService.php
index fe0ec1b1..068997ab 100644
--- a/src/Services/SwaggerService.php
+++ b/src/Services/SwaggerService.php
@@ -811,7 +811,7 @@ protected function saveTempData()
     public function saveProductionData()
     {
         if (ParallelTesting::token()) {
-            $this->driver->appendProcessDataToTmpFile(function (array $sharedTmpData) {
+            $this->driver->appendProcessDataToTmpFile(function (?array $sharedTmpData) {
                 $resultDocContent = (empty($sharedTmpData))
                     ? $this->generateEmptyData($this->config['info']['description'])
                     : $sharedTmpData;
diff --git a/tests/SwaggerServiceTest.php b/tests/SwaggerServiceTest.php
index bef5d334..6225a3f4 100644
--- a/tests/SwaggerServiceTest.php
+++ b/tests/SwaggerServiceTest.php
@@ -15,11 +15,12 @@
 use RonasIT\AutoDoc\Tests\Support\Mock\TestNotificationSetting;
 use RonasIT\AutoDoc\Tests\Support\Mock\TestRequest;
 use RonasIT\AutoDoc\Tests\Support\Traits\SwaggerServiceMockTrait;
+use RonasIT\AutoDoc\Tests\Support\Traits\SwaggerServiceTestingTrait;
 use stdClass;
 
 class SwaggerServiceTest extends TestCase
 {
-    use SwaggerServiceMockTrait;
+    use SwaggerServiceMockTrait, SwaggerServiceTestingTrait;
 
     public function testConstructorInvalidConfigVersion()
     {
@@ -843,9 +844,7 @@ public function testMergeTempDocumentation()
     {
         $this->mockParallelTestingToken();
 
-        $tempFilePath = __DIR__ . '/../storage/temp_documentation.json';
-
-        file_put_contents($tempFilePath, json_encode($this->getJsonFixture('tmp_data_post_user_request')));
+        $this->fillTempFile($this->getFixture('tmp_data_post_user_request.json'));
 
         $this->mockDriverGetTmpData($this->getJsonFixture('tmp_data_search_users_empty_request'));
 
@@ -853,8 +852,20 @@ public function testMergeTempDocumentation()
 
         $service->saveProductionData();
 
-        $this->assertFileExists($tempFilePath);
-        $this->assertFileEquals($this->generateFixturePath('tmp_data_merged.json'), $tempFilePath);
+        $this->assertTempFileEqualsFixture('tmp_data_merged');
+    }
+
+    public function testMergeToEmptyTempDocumentation()
+    {
+        $this->mockParallelTestingToken();
+
+        $this->fillTempFile('');
+
+        $this->mockDriverGetTmpData($this->getJsonFixture('tmp_data_search_users_empty_request'));
+
+        app(SwaggerService::class)->saveProductionData();
+
+        $this->assertTempFileEqualsFixture('tmp_data_merged_to_empty_temp_documentation');
     }
 
     public function testAddDataWhenInvokableClass()
diff --git a/tests/fixtures/SwaggerServiceTest/tmp_data_merged_to_empty_temp_documentation.json b/tests/fixtures/SwaggerServiceTest/tmp_data_merged_to_empty_temp_documentation.json
new file mode 100644
index 00000000..5297bc0b
--- /dev/null
+++ b/tests/fixtures/SwaggerServiceTest/tmp_data_merged_to_empty_temp_documentation.json
@@ -0,0 +1 @@
+{"openapi":"3.1.0","servers":[{"url":"http:\/\/localhost"}],"paths":{"\/api\/users":{"get":{"tags":["api"],"produces":["application\/json"],"parameters":[],"responses":{"200":{"description":"OK","content":{"application\/json":{"schema":{"$ref":"#\/components\/schemas\/getApiusers200ResponseObject","type":"object"},"example":{"current_page":1,"data":[{"id":1,"first_name":"Billy","last_name":"Coleman","email":"billy.coleman@example.com","created_at":null,"updated_at":null,"role_id":1,"date_of_birth":"1986-05-20","phone":"+79535482530","position":"admin","starts_on":"2022-04-16 00:00:00","hr_id":null,"manager_id":null,"lead_id":null,"avatar_id":null,"deleted_at":null,"company_id":1}],"first_page_url":"http:\/\/localhost\/api\/users?page=1","from":1,"last_page":1,"last_page_url":"http:\/\/localhost\/api\/users?page=1","links":[{"url":null,"label":"« Previous","active":false},{"url":"http:\/\/localhost\/api\/users?page=1","label":"1","active":true},{"url":null,"label":"Next »","active":false}],"next_page_url":null,"path":"http:\/\/localhost\/api\/users","per_page":20,"prev_page_url":null,"to":1,"total":1}}}}},"security":[],"description":"","consumes":[]}}},"components":{"schemas":{"getApiusers200ResponseObject":{"type":"object","properties":{"current_page":{"type":"integer"},"data":{"type":"array"},"first_page_url":{"type":"string"},"from":{"type":"integer"},"last_page":{"type":"integer"},"last_page_url":{"type":"string"},"links":{"type":"array"},"next_page_url":{"nullable":true},"path":{"type":"string"},"per_page":{"type":"integer"},"prev_page_url":{"nullable":true},"to":{"type":"integer"},"total":{"type":"integer"}}}}},"info":{"description":"This is automatically collected documentation","version":"0.0.0","title":"Name of Your Application","termsOfService":"","contact":{"email":"your@mail.com"},"license":{"name":"","url":""}}}
\ No newline at end of file
diff --git a/tests/support/Traits/SwaggerServiceTestingTrait.php b/tests/support/Traits/SwaggerServiceTestingTrait.php
new file mode 100644
index 00000000..9db8f8e0
--- /dev/null
+++ b/tests/support/Traits/SwaggerServiceTestingTrait.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace RonasIT\AutoDoc\Tests\Support\Traits;
+
+use RonasIT\Support\Traits\MockTrait;
+
+trait SwaggerServiceTestingTrait
+{
+    use MockTrait;
+
+    protected function fillTempFile(string $content): void
+    {
+        file_put_contents(getcwd() . '/storage/temp_documentation.json', $content);
+    }
+
+    protected function assertTempFileEqualsFixture(string $fixture): void
+    {
+        $fixture = $this->prepareFixtureName($fixture);
+
+        $path = $this->generateFixturePath($fixture);
+
+        $this->assertFileEquals($path, getcwd() . '/storage/temp_documentation.json');
+    }
+}