diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java
index 49a7484d9..6236c90c0 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2011-2021 the original author or authors.
+ * Copyright 2011-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1389,11 +1389,11 @@ public class QueryMapper {
 			}
 
 			String nextToken() {
-				return pathParts.get(currentIndex+1);
+				return pathParts.get(currentIndex + 1);
 			}
 
 			boolean hasNexToken() {
-				return pathParts.size() > currentIndex+1;
+				return pathParts.size() > currentIndex + 1;
 			}
 
 			/**
@@ -1405,24 +1405,25 @@ public class QueryMapper {
 			protected String mapPropertyName(MongoPersistentProperty property) {
 
 				StringBuilder mappedName = new StringBuilder(PropertyToFieldNameConverter.INSTANCE.convert(property));
-				if(!hasNexToken()) {
+				if (!hasNexToken()) {
 					return mappedName.toString();
 				}
 
 				String nextToken = nextToken();
-				if(isPositionalParameter(nextToken)) {
+				if (isPositionalParameter(nextToken)) {
 
 					mappedName.append(".").append(nextToken);
-					currentIndex+=2;
+					currentIndex += 2;
 					return mappedName.toString();
 				}
 
-				if(property.isMap()) {
+				if (property.isMap()) {
 
 					mappedName.append(".").append(nextToken);
-					currentIndex+=2;
+					currentIndex += 2;
 					return mappedName.toString();
 				}
+
 				currentIndex++;
 				return mappedName.toString();
 			}
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java
index 6e3e492f4..4335c5e23 100644
--- a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2021 the original author or authors.
+ * Copyright 2013-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1208,7 +1208,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(EntityWithNestedMap.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.a.b.d","e")));
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.a.b.d", "e")));
 	}
 
 	@Test // GH-3775
@@ -1218,7 +1218,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(EntityWithNestedMap.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0.1.3","4")));
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.0.1.3", "4")));
 	}
 
 	@Test // GH-3775
@@ -1228,7 +1228,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(EntityWithNestedMap.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0.1.c","4")));
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.0.1.c", "4")));
 	}
 
 	@Test // GH-3775
@@ -1238,7 +1238,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(EntityWithNestedMap.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0a.1b.3c","4")));
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.0a.1b.3c", "4")));
 	}
 
 	@Test // GH-3688
@@ -1258,7 +1258,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(TestData.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("testInnerData.testMap.1.intValue","4")));
+		assertThat(mappedUpdate).isEqualTo("{ $set: { 'testInnerData.testMap.1.intValue': '4' }}");
 	}
 
 	@Test // GH-3921
@@ -1268,7 +1268,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(TestData.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("testInnerData.imaginaryMap.1.noExistingProperty","4")));
+		assertThat(mappedUpdate).isEqualTo("{ $set: { 'testInnerData.imaginaryMap.1.nonExistingProperty': '4' }}");
 	}
 
 	@Test // GH-3921
@@ -1278,7 +1278,7 @@ class UpdateMapperUnitTests {
 		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
 				context.getPersistentEntity(TestData.class));
 
-		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("testInnerData.testMap.1.nonExistingProperty.2.someValue","4")));
+		assertThat(mappedUpdate).isEqualTo("{ $set: { 'testInnerData.testMap.1.nonExistingProperty.2.someValue': '4' }}");
 	}
 
 	static class DomainTypeWrappingConcreteyTypeHavingListOfInterfaceTypeAttributes {
@@ -1517,7 +1517,7 @@ class UpdateMapperUnitTests {
 		Map<Object, NestedDocument> concreteMap;
 	}
 
-	static class EntityWithIntKeyedMap{
+	static class EntityWithIntKeyedMap {
 		Map<Integer, EntityWithObjectMap> intKeyedMap;
 	}
 
@@ -1653,8 +1653,7 @@ class UpdateMapperUnitTests {
 
 	@Data
 	private static class TestData {
-		@Id
-		private String id;
+		@Id private String id;
 		private TestInnerData testInnerData;
 	}