diff --git a/checker/check_response_property_one_of_updated_test.go b/checker/check_response_property_one_of_updated_test.go
index a354717c..ccf31286 100644
--- a/checker/check_response_property_one_of_updated_test.go
+++ b/checker/check_response_property_one_of_updated_test.go
@@ -9,7 +9,7 @@ import (
 	"github.com/tufin/oasdiff/load"
 )
 
-// CL: adding 'oneOf' schema to the response body or response body property
+// BC: adding 'oneOf' schema to the response body or response body property is breaking
 func TestResponsePropertyOneOfAdded(t *testing.T) {
 	s1, err := open("../data/checker/response_property_one_of_added_base.yaml")
 	require.NoError(t, err)
@@ -26,7 +26,7 @@ func TestResponsePropertyOneOfAdded(t *testing.T) {
 		{
 			Id:          checker.ResponseBodyOneOfAddedId,
 			Args:        []any{"#/components/schemas/Rabbit", "200"},
-			Level:       checker.INFO,
+			Level:       checker.ERR,
 			Operation:   "GET",
 			Path:        "/pets",
 			Source:      load.NewSource("../data/checker/response_property_one_of_added_revision.yaml"),
@@ -35,7 +35,7 @@ func TestResponsePropertyOneOfAdded(t *testing.T) {
 		{
 			Id:          checker.ResponsePropertyOneOfAddedId,
 			Args:        []any{"#/components/schemas/Breed3", "/oneOf[#/components/schemas/Dog]/breed", "200"},
-			Level:       checker.INFO,
+			Level:       checker.ERR,
 			Operation:   "GET",
 			Path:        "/pets",
 			Source:      load.NewSource("../data/checker/response_property_one_of_added_revision.yaml"),
@@ -44,7 +44,7 @@ func TestResponsePropertyOneOfAdded(t *testing.T) {
 		{
 			Id:          checker.ResponsePropertyOneOfAddedId,
 			Args:        []any{"subschema #2: Dark brown types", "/oneOf[#/components/schemas/Fox]/breed", "200"},
-			Level:       checker.INFO,
+			Level:       checker.ERR,
 			Operation:   "GET",
 			Path:        "/pets",
 			Source:      load.NewSource("../data/checker/response_property_one_of_added_revision.yaml"),
diff --git a/checker/rules.go b/checker/rules.go
index 6e356c5a..99321f76 100644
--- a/checker/rules.go
+++ b/checker/rules.go
@@ -385,9 +385,9 @@ func GetAllRules() BackwardCompatibilityRules {
 		newBackwardCompatibilityRule(ResponseBodyMinLengthDecreasedId, ERR, ResponsePropertyMinLengthDecreasedCheck, DirectionResponse, LocationBody, ActionDecrease),
 		newBackwardCompatibilityRule(ResponsePropertyMinLengthDecreasedId, ERR, ResponsePropertyMinLengthDecreasedCheck, DirectionResponse, LocationProperties, ActionDecrease),
 		// ResponsePropertyOneOfUpdated
-		newBackwardCompatibilityRule(ResponseBodyOneOfAddedId, INFO, ResponsePropertyOneOfUpdated, DirectionResponse, LocationBody, ActionAdd),
+		newBackwardCompatibilityRule(ResponseBodyOneOfAddedId, ERR, ResponsePropertyOneOfUpdated, DirectionResponse, LocationBody, ActionAdd),
 		newBackwardCompatibilityRule(ResponseBodyOneOfRemovedId, INFO, ResponsePropertyOneOfUpdated, DirectionResponse, LocationBody, ActionRemove),
-		newBackwardCompatibilityRule(ResponsePropertyOneOfAddedId, INFO, ResponsePropertyOneOfUpdated, DirectionResponse, LocationProperties, ActionAdd),
+		newBackwardCompatibilityRule(ResponsePropertyOneOfAddedId, ERR, ResponsePropertyOneOfUpdated, DirectionResponse, LocationProperties, ActionAdd),
 		newBackwardCompatibilityRule(ResponsePropertyOneOfRemovedId, INFO, ResponsePropertyOneOfUpdated, DirectionResponse, LocationProperties, ActionRemove),
 		// ResponsePropertyTypeChangedCheck
 		newBackwardCompatibilityRule(ResponseBodyTypeChangedId, ERR, ResponsePropertyTypeChangedCheck, DirectionResponse, LocationBody, ActionChange),
diff --git a/docs/BREAKING-CHANGES-EXAMPLES.md b/docs/BREAKING-CHANGES-EXAMPLES.md
index b4a0cbbe..991c8caa 100644
--- a/docs/BREAKING-CHANGES-EXAMPLES.md
+++ b/docs/BREAKING-CHANGES-EXAMPLES.md
@@ -4,6 +4,7 @@ These examples are automatically generated from unit tests.
 [Deleting a value from an x-extensible-enum parameter is breaking](../checker/check_request_parameter_x_extensible_enum_value_removed_test.go?plain=1#L11)  
 [Deleting a value from an x-extensible-enum property is breaking](../checker/check_request_property_x_extensible_enum_value_removed_test.go?plain=1#L11)  
 [adding 'allOf' subschema to the request body or request body property is breaking](../checker/check_breaking_test.go?plain=1#L727)  
+[adding 'oneOf' schema to the response body or response body property is breaking](../checker/check_response_property_one_of_updated_test.go?plain=1#L12)  
 [adding a new required property in request body is breaking](../checker/check_breaking_property_test.go?plain=1#L353)  
 [adding a pattern to a schema is breaking for recursive properties](../checker/check_breaking_test.go?plain=1#L490)  
 [adding a pattern to a schema is breaking](../checker/check_breaking_test.go?plain=1#L473)  
@@ -174,7 +175,6 @@ These examples are automatically generated from unit tests.
 [adding 'anyOf' schema to the request body or request body property](../checker/check_request_property_any_of_updated_test.go?plain=1#L12)  
 [adding 'anyOf' schema to the response body or response body property](../checker/check_response_property_any_of_updated_test.go?plain=1#L12)  
 [adding 'oneOf' schema to the request body or request body property](../checker/check_request_property_one_of_updated_test.go?plain=1#L12)  
-[adding 'oneOf' schema to the response body or response body property](../checker/check_response_property_one_of_updated_test.go?plain=1#L12)  
 [adding a new global security to the API](../checker/check_api_security_updated_test.go?plain=1#L12)  
 [adding a new media type to request body](../checker/check_request_body_mediatype_updated_test.go?plain=1#L12)  
 [adding a new media type to response](../checker/check_response_mediatype_updated_test.go?plain=1#L12)