diff --git a/sections/testingandquality/aaa.russian.md b/sections/testingandquality/aaa.russian.md
index 4fb21221..b74e8f77 100644
--- a/sections/testingandquality/aaa.russian.md
+++ b/sections/testingandquality/aaa.russian.md
@@ -20,7 +20,7 @@ describe.skip('Customer classifier', () => {
     test('When customer spent more than 500$, should be classified as premium', () => {
         //Arrange
         const customerToClassify = {spent:505, joined: new Date(), id:1}
-        const DBStub = sinon.stub(dataAccess, "getCustomer")
+        const DBStub = sinon.stub(dataAccess, 'getCustomer')
             .reply({id:1, classification: 'regular'});
 
         //Act
@@ -38,7 +38,7 @@ describe.skip('Customer classifier', () => {
 ```javascript
 test('Should be classified as premium', () => {
         const customerToClassify = {spent:505, joined: new Date(), id:1}
-        const DBStub = sinon.stub(dataAccess, "getCustomer")
+        const DBStub = sinon.stub(dataAccess, 'getCustomer')
             .reply({id:1, classification: 'regular'});
         const receivedClassification = customerClassifier.classifyCustomer(customerToClassify);
         expect(receivedClassification).toMatch('premium');