diff --git a/mongo/integration/unified_spec_test.go b/mongo/integration/unified_spec_test.go
index c12df5f6ea..7689b614ec 100644
--- a/mongo/integration/unified_spec_test.go
+++ b/mongo/integration/unified_spec_test.go
@@ -162,7 +162,19 @@ type expectation struct {
 }
 
 type outcome struct {
-	Collection *outcomeCollection `bson:"collection"`
+	Collection     *outcomeCollection
+	CollectionData []*collectionData
+}
+
+func (outcome *outcome) UnmarshalBSON(b []byte) error {
+	var v struct {
+		Collection *outcomeCollection `bson:"collection"`
+	}
+	err := bson.UnmarshalWithRegistry(specTestRegistry, b, &v)
+	if err == nil {
+		outcome.Collection = v.Collection
+	}
+	return err
 }
 
 type outcomeCollection struct {
@@ -170,6 +182,12 @@ type outcomeCollection struct {
 	Data interface{} `bson:"data"`
 }
 
+type collectionData struct {
+	DatabaseName   string     `bson:"databaseName"`
+	CollectionName string     `bson:"collectionName"`
+	Documents      []bson.Raw `bson:"documents"`
+}
+
 type operationError struct {
 	ErrorContains      *string  `bson:"errorContains"`
 	ErrorCodeName      *string  `bson:"errorCodeName"`