diff --git a/packages/devextreme-themebuilder/src/modules/bootstrap-extractor.ts b/packages/devextreme-themebuilder/src/modules/bootstrap-extractor.ts
index 77f742ff03dd..32cff0e2f319 100644
--- a/packages/devextreme-themebuilder/src/modules/bootstrap-extractor.ts
+++ b/packages/devextreme-themebuilder/src/modules/bootstrap-extractor.ts
@@ -93,10 +93,11 @@ export default class BootstrapExtractor {
   async sassProcessor(): Promise<string> {
     const functions = await this.readSassFile('_functions.scss');
     const variables = await this.readSassFile('_variables.scss');
-    
+
     const variablesDarkFile = '_variables-dark.scss';
     const variablesDark = this.version === 5 && existsSync(this.getFilePath(variablesDarkFile)) ? await this.readSassFile(variablesDarkFile) : ''; // TODO: can be removed safely in bootstrap@6
 
+    console.log('------readSassFile---->');
     const result = `${functions}
 ${variables}
 ${variablesDark}
diff --git a/packages/devextreme-themebuilder/tests/modules/builder.test.ts b/packages/devextreme-themebuilder/tests/modules/builder.test.ts
index 4f6b8fb0af58..886adb86c3c1 100644
--- a/packages/devextreme-themebuilder/tests/modules/builder.test.ts
+++ b/packages/devextreme-themebuilder/tests/modules/builder.test.ts
@@ -119,7 +119,7 @@ describe('Builder integration tests', () => {
       const themeBuilderCss = normalizeCss(result.css);
       const cssPath = path.resolve(__dirname, '../../../devextreme/artifacts/css/dx.light.css');
       const distributionCss = normalizeCss(readFileSync(cssPath, 'utf8'));
-      expect(themeBuilderCss.substring(0,1000)).toBe(distributionCss.substring(0,1000));
+      expect(themeBuilderCss).toBe(distributionCss);
     });
   }, buildTimeout);