diff --git a/source/extensions/filters/udp/dns_filter/dns_parser.h b/source/extensions/filters/udp/dns_filter/dns_parser.h
index 49a4643758c20..57797797acfb8 100644
--- a/source/extensions/filters/udp/dns_filter/dns_parser.h
+++ b/source/extensions/filters/udp/dns_filter/dns_parser.h
@@ -73,7 +73,7 @@ class DnsAnswerRecord : public BaseDnsRecord {
 };
 
 using DnsAnswerRecordPtr = std::unique_ptr<DnsAnswerRecord>;
-using DnsAnswerMap = std::unordered_multimap<std::string, DnsAnswerRecordPtr>;
+using DnsAnswerMap = std::multimap<std::string, DnsAnswerRecordPtr>;
 
 /**
  * DnsSrvRecord represents a single answer record for a service which is to be serialized and
diff --git a/test/extensions/filters/udp/dns_filter/dns_filter_test_utils.cc b/test/extensions/filters/udp/dns_filter/dns_filter_test_utils.cc
index e22b86b94dd72..ddfa427d76c68 100644
--- a/test/extensions/filters/udp/dns_filter/dns_filter_test_utils.cc
+++ b/test/extensions/filters/udp/dns_filter/dns_filter_test_utils.cc
@@ -237,7 +237,6 @@ bool DnsResponseValidator::validateDnsResponseObject(DnsQueryContextPtr& context
 
 bool DnsResponseValidator::parseAnswerRecords(DnsAnswerMap& answers, const uint16_t answer_count,
                                               const Buffer::InstancePtr& buffer, uint64_t& offset) {
-  answers.reserve(answer_count);
   for (auto index = 0; index < answer_count; index++) {
     ENVOY_LOG(trace, "Parsing [{}/{}] answers", index, answer_count);
     auto rec = parseDnsAnswerRecord(buffer, offset);