diff --git a/net/dcsctp/socket/BUILD.gn b/net/dcsctp/socket/BUILD.gn
index 58abd7ac31..72ac139acb 100644
--- a/net/dcsctp/socket/BUILD.gn
+++ b/net/dcsctp/socket/BUILD.gn
@@ -211,6 +211,7 @@ if (rtc_include_tests) {
       "../packet:tlv_trait",
       "../public:socket",
       "../public:types",
+      "../public:utils",
       "../rx:data_tracker",
       "../rx:reassembly_queue",
       "../testing:data_generator",
@@ -220,6 +221,7 @@ if (rtc_include_tests) {
       "../tx:retransmission_queue",
     ]
     absl_deps = [
+      "//third_party/abseil-cpp/absl/flags:flag",
       "//third_party/abseil-cpp/absl/memory",
       "//third_party/abseil-cpp/absl/strings",
       "//third_party/abseil-cpp/absl/types:optional",
diff --git a/net/dcsctp/socket/dcsctp_socket_test.cc b/net/dcsctp/socket/dcsctp_socket_test.cc
index 7a7daacf15..4ab42491d8 100644
--- a/net/dcsctp/socket/dcsctp_socket_test.cc
+++ b/net/dcsctp/socket/dcsctp_socket_test.cc
@@ -16,6 +16,7 @@
 #include <utility>
 #include <vector>
 
+#include "absl/flags/flag.h"
 #include "absl/memory/memory.h"
 #include "absl/strings/string_view.h"
 #include "absl/types/optional.h"
@@ -40,6 +41,7 @@
 #include "net/dcsctp/public/dcsctp_message.h"
 #include "net/dcsctp/public/dcsctp_options.h"
 #include "net/dcsctp/public/dcsctp_socket.h"
+#include "net/dcsctp/public/text_pcap_packet_observer.h"
 #include "net/dcsctp/public/types.h"
 #include "net/dcsctp/rx/reassembly_queue.h"
 #include "net/dcsctp/socket/mock_dcsctp_socket_callbacks.h"
@@ -47,6 +49,8 @@
 #include "rtc_base/gunit.h"
 #include "test/gmock.h"
 
+ABSL_FLAG(bool, dcsctp_capture_packets, false, "Print packet capture.");
+
 namespace dcsctp {
 namespace {
 using ::testing::_;
@@ -207,14 +211,21 @@ DcSctpOptions MakeOptionsForTest(bool enable_message_interleaving) {
   return options;
 }
 
+std::unique_ptr<PacketObserver> GetPacketObserver(absl::string_view name) {
+  if (absl::GetFlag(FLAGS_dcsctp_capture_packets)) {
+    return std::make_unique<TextPcapPacketObserver>(name);
+  }
+  return nullptr;
+}
+
 class DcSctpSocketTest : public testing::Test {
  protected:
   explicit DcSctpSocketTest(bool enable_message_interleaving = false)
       : options_(MakeOptionsForTest(enable_message_interleaving)),
         cb_a_("A"),
         cb_z_("Z"),
-        sock_a_("A", cb_a_, nullptr, options_),
-        sock_z_("Z", cb_z_, nullptr, options_) {}
+        sock_a_("A", cb_a_, GetPacketObserver("A"), options_),
+        sock_z_("Z", cb_z_, GetPacketObserver("Z"), options_) {}
 
   void AdvanceTime(DurationMs duration) {
     cb_a_.AdvanceTime(duration);