diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/QueryMapperUnitTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/QueryMapperUnitTests.java
index a54e80fa3..11ea78fd4 100755
--- a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/QueryMapperUnitTests.java
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/QueryMapperUnitTests.java
@@ -1355,25 +1355,6 @@ public class QueryMapperUnitTests {
 		org.bson.Document mappedFields = mapper.getMappedFields(new org.bson.Document("id", 1), context.getPersistentEntity(WithStringId.class));
 		assertThat(mappedFields).containsEntry("_id", 1);
 	}
-	
-	@Test
-	void mapNestedStringFieldCorrectly() {
-		Update update = new Update();
-		update.set("levelOne.a.b.d", "e");
-		org.bson.Document document = mapper.getMappedObject(update.getUpdateObject(),
-				context.getPersistentEntity(EntityWithNestedMap.class));
-		assertThat(document).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.a.b.d","e")));
-	}
-	
-	@Test
-	void mapNestedIntegerFieldCorrectly() {
-		Update update = new Update();
-		update.set("levelOne.0.1.3", "4");
-		org.bson.Document document = mapper.getMappedObject(update.getUpdateObject(),
-				context.getPersistentEntity(EntityWithNestedMap.class));
-		assertThat(document).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0.1.3","4")));
-	}
-
 
 	@Test // GH-3783
 	void retainsId$InWithStringArray() {
@@ -1562,11 +1543,6 @@ public class QueryMapperUnitTests {
 	static class EntityWithComplexValueTypeList {
 		List<SimpleEntityWithoutId> list;
 	}
-	
-	static class EntityWithNestedMap {
-		Map<String, Map<String, Map<String, Object>>> levelOne;
-	}
-	
 
 	static class WithExplicitTargetTypes {
 
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 bba9811e5..44712fa8d 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
@@ -68,6 +68,7 @@ import com.mongodb.DBRef;
  * @author Mark Paluch
  * @author Pavel Vodrazka
  * @author David Julia
+ * @author Divya Srivastava
  */
 @ExtendWith(MockitoExtension.class)
 class UpdateMapperUnitTests {
@@ -1200,6 +1201,56 @@ class UpdateMapperUnitTests {
 		assertThat(mappedUpdate).isEqualTo("{\"$set\": {\"map.class\": \"value\"}}");
 	}
 
+	@Test // GH-3775
+	void mapNestedStringFieldCorrectly() {
+
+		Update update = new Update().set("levelOne.a.b.d", "e");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithNestedMap.class));
+
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.a.b.d","e")));
+	}
+
+	@Test // GH-3775
+	void mapNestedIntegerFieldCorrectly() {
+
+		Update update = new Update().set("levelOne.0.1.3", "4");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithNestedMap.class));
+
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0.1.3","4")));
+	}
+
+	@Test // GH-3775
+	void mapNestedMixedStringIntegerFieldCorrectly() {
+
+		Update update = new Update().set("levelOne.0.1.c", "4");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithNestedMap.class));
+
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0.1.c","4")));
+	}
+
+	@Test // GH-3775
+	void mapNestedMixedStringIntegerWithStartNumberFieldCorrectly() {
+
+		Update update = new Update().set("levelOne.0a.1b.3c", "4");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithNestedMap.class));
+
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set",new org.bson.Document("levelOne.0a.1b.3c","4")));
+	}
+
+	@Test // GH-3688
+	void multipleKeysStartingWithANumberInNestedPath() {
+
+		Update update = new Update().set("intKeyedMap.1a.map.0b", "testing");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithIntKeyedMap.class));
+
+		assertThat(mappedUpdate).isEqualTo("{\"$set\": {\"intKeyedMap.1a.map.0b\": \"testing\"}}");
+	}
+
 	static class DomainTypeWrappingConcreteyTypeHavingListOfInterfaceTypeAttributes {
 		ListModelWrapper concreteTypeWithListAttributeOfInterfaceType;
 	}
@@ -1566,4 +1617,8 @@ class UpdateMapperUnitTests {
 		String transientValue;
 	}
 
+	static class EntityWithNestedMap {
+		Map<String, Map<String, Map<String, Object>>> levelOne;
+	}
+
 }