diff --git a/test/__utils__/test-utils.js b/test/__utils__/test-utils.js
index f6d29672..7d227446 100644
--- a/test/__utils__/test-utils.js
+++ b/test/__utils__/test-utils.js
@@ -1,5 +1,5 @@
 const fs = require('fs');
-const sy = require('@stoplight/yaml');
+const os = require('os');
 const {exec} = require('child_process');
 const path = require('path');
 const {parseFile, stringify} = require('../../utils/file');
@@ -13,6 +13,7 @@ async function loadTest(folder, inputType = 'yaml', outType = 'yaml') {
   const inputPath = `./test/${folder}/${inputFile}`;
   const outputFile = `output.${outType}`;
   const outputPath = `./test/${folder}/${outputFile}`;
+  const tmpOutput = path.join(os.tmpdir(), `openapi-format-${folder}-output.${outType}`);
 
   try {
     input = await parseFile(inputPath);
@@ -26,10 +27,10 @@ async function loadTest(folder, inputType = 'yaml', outType = 'yaml') {
     // File not found = {} will be used
   }
 
-  let result = await cli([`${inputFile}`, `--configFile options.yaml`], testPath);
+  let result = await cli([`${inputFile}`, `--configFile options.yaml`, `--output ${tmpOutput}`], testPath);
 
   try {
-    outputAfter = await parseFile(outputPath);
+    outputAfter = await parseFile(tmpOutput);
   } catch (err) {
     //
   }
diff --git a/test/json-default-bug-big-numbers/output.json b/test/json-default-bug-big-numbers/output.json
index 6de1f81b..38e709eb 100644
--- a/test/json-default-bug-big-numbers/output.json
+++ b/test/json-default-bug-big-numbers/output.json
@@ -59,4 +59,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/test/json-delete-method/output.json b/test/json-delete-method/output.json
index df6856cf..9dcb2515 100644
--- a/test/json-delete-method/output.json
+++ b/test/json-delete-method/output.json
@@ -35,4 +35,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/test/json-filter-inverse-operationids-126/output.json b/test/json-filter-inverse-operationids-126/output.json
index 68cb2d0a..7d0edede 100644
--- a/test/json-filter-inverse-operationids-126/output.json
+++ b/test/json-filter-inverse-operationids-126/output.json
@@ -78,4 +78,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/test/json-filter-unused/output.json b/test/json-filter-unused/output.json
index de838ba0..ec0a5a5a 100644
--- a/test/json-filter-unused/output.json
+++ b/test/json-filter-unused/output.json
@@ -141,4 +141,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/test/overlay-extends-local/output.yaml b/test/overlay-extends-local/output.yaml
index 1a038f9d..60ace849 100644
--- a/test/overlay-extends-local/output.yaml
+++ b/test/overlay-extends-local/output.yaml
@@ -3,4 +3,3 @@ info:
   title: Base Local
   version: 1.0.0
 paths: {}
-
diff --git a/test/overlay-extends-remote/output.yaml b/test/overlay-extends-remote/output.yaml
index dc7c429a..10250f5a 100644
--- a/test/overlay-extends-remote/output.yaml
+++ b/test/overlay-extends-remote/output.yaml
@@ -5,4 +5,3 @@ info:
 servers:
   - url: 'https://api.example.com'
     description: Default server
-    
diff --git a/test/test.js b/test/test.js
index 8f871336..7af835c1 100644
--- a/test/test.js
+++ b/test/test.js
@@ -52,13 +52,13 @@ describe('openapi-format tests', () => {
         if (fs.existsSync(configFilename)) {
           // Load options file
           configFileOptions = await parseFile(configFilename);
-          configFileOptions.sort = !configFileOptions['no-sort'];
-          if (configFileOptions['no-sort'] && configFileOptions['no-sort'] === true) {
+          configFileOptions.sort = configFileOptions.sort ?? true;
+          configFileOptions.bundle = configFileOptions.bundle ?? true;
+          if (configFileOptions['no-sort']) {
             configFileOptions.sort = !configFileOptions['no-sort'];
             delete configFileOptions['no-sort'];
           }
-          configFileOptions.bundle = !configFileOptions['no-bundle'];
-          if (configFileOptions['no-sort'] && configFileOptions['no-bundle'] === true) {
+          if (configFileOptions['no-bundle']) {
             configFileOptions.bundle = !configFileOptions['no-bundle'];
             delete configFileOptions['no-bundle'];
           }
@@ -128,8 +128,7 @@ describe('openapi-format tests', () => {
 
         try {
           if (!readOutput) {
-            // Write OpenAPI string to file
-            await writeFile(outputFilename, result, options);
+            fs.writeFileSync(outputFilename, result, 'utf8');
           }
         } catch (error) {
           console.error('error', error);
diff --git a/test/yaml-filter-inverse-flagsvalue-value-array/output.yaml b/test/yaml-filter-inverse-flagsvalue-value-array/output.yaml
index 9a2906d4..31333343 100644
--- a/test/yaml-filter-inverse-flagsvalue-value-array/output.yaml
+++ b/test/yaml-filter-inverse-flagsvalue-value-array/output.yaml
@@ -2,4 +2,4 @@ openapi: 3.0.1
 servers:
   - url: 'https://server-e'
     x-stage:
-      - e
\ No newline at end of file
+      - e