diff --git a/src/ripple/app/misc/NetworkOPs.cpp b/src/ripple/app/misc/NetworkOPs.cpp
index 73719c4a96..cae1b6163f 100644
--- a/src/ripple/app/misc/NetworkOPs.cpp
+++ b/src/ripple/app/misc/NetworkOPs.cpp
@@ -2009,6 +2009,15 @@ NetworkOPsImp::pubValidation(std::shared_ptr<STValidation> const& val)
         jvObj[jss::signing_time] = *(*val)[~sfSigningTime];
         jvObj[jss::data] = strHex(val->getSerializer().slice());
 
+        if (auto version = (*val)[~sfServerVersion])
+            jvObj[jss::server_version] = std::to_string(*version);
+
+        if (auto cookie = (*val)[~sfCookie])
+            jvObj[jss::cookie] = std::to_string(*cookie);
+
+        if (auto hash = (*val)[~sfValidatedHash])
+            jvObj[jss::validated_hash] = strHex(*hash);
+
         auto const masterKey =
             app_.validatorManifests().getMasterKey(signerPublic);
 
diff --git a/src/ripple/protocol/jss.h b/src/ripple/protocol/jss.h
index b9b782a6a2..1b0c4793aa 100644
--- a/src/ripple/protocol/jss.h
+++ b/src/ripple/protocol/jss.h
@@ -178,6 +178,7 @@ JSS(complete_shards);        // out: OverlayImpl, PeerImp
 JSS(consensus);              // out: NetworkOPs, LedgerConsensus
 JSS(converge_time);          // out: NetworkOPs
 JSS(converge_time_s);        // out: NetworkOPs
+JSS(cookie);                 // out: NetworkOPs
 JSS(count);                  // in: AccountTx*, ValidatorList
 JSS(counters);               // in/out: retrieve counters
 JSS(currentShard);           // out: NodeToShardStatus
@@ -498,6 +499,7 @@ JSS(server_domain);             // out: NetworkOPs
 JSS(server_state);              // out: NetworkOPs
 JSS(server_state_duration_us);  // out: NetworkOPs
 JSS(server_status);             // out: NetworkOPs
+JSS(server_version);            // out: NetworkOPs
 JSS(settle_delay);              // out: AccountChannels
 JSS(severity);                  // in: LogLevel
 JSS(shards);                    // in/out: GetCounts, DownloadShard
@@ -587,6 +589,7 @@ JSS(validated);               // out: NetworkOPs, RPCHelpers, AccountTx*
 JSS(validator_list_expires);  // out: NetworkOps, ValidatorList
 JSS(validator_list);          // out: NetworkOps, ValidatorList
 JSS(validators);
+JSS(validated_hash);          // out: NetworkOPs
 JSS(validated_ledger);        // out: NetworkOPs
 JSS(validated_ledger_index);  // out: SubmitTransaction
 JSS(validated_ledgers);       // out: NetworkOPs
diff --git a/src/test/rpc/Subscribe_test.cpp b/src/test/rpc/Subscribe_test.cpp
index 3e1916caf4..65a85ef25e 100644
--- a/src/test/rpc/Subscribe_test.cpp
+++ b/src/test/rpc/Subscribe_test.cpp
@@ -365,24 +365,68 @@ public:
         }
 
         {
-            // Accept a ledger
-            env.close();
+            // Lambda to check ledger validations from the stream.
+            auto validValidationFields = [&env, &valPublicKey](
+                                             Json::Value const& jv) {
+                if (jv[jss::type] != "validationReceived")
+                    return false;
 
-            // Check stream update
-            using namespace std::chrono_literals;
+                if (jv[jss::validation_public_key].asString() != valPublicKey)
+                    return false;
 
-            BEAST_EXPECT(wsc->findMsg(5s, [&](auto const& jv) {
-                return jv[jss::type] == "validationReceived" &&
-                    jv[jss::validation_public_key].asString() == valPublicKey &&
-                    jv[jss::ledger_hash] ==
-                    to_string(env.closed()->info().hash) &&
-                    jv[jss::ledger_index] ==
-                    std::to_string(env.closed()->info().seq) &&
-                    jv[jss::flags] ==
-                    (vfFullyCanonicalSig | vfFullValidation) &&
-                    jv[jss::full] == true && !jv.isMember(jss::load_fee) &&
-                    jv[jss::signature] && jv[jss::signing_time];
-            }));
+                if (jv[jss::ledger_hash] !=
+                    to_string(env.closed()->info().hash))
+                    return false;
+
+                if (jv[jss::ledger_index] !=
+                    std::to_string(env.closed()->info().seq))
+                    return false;
+
+                if (jv[jss::flags] != (vfFullyCanonicalSig | vfFullValidation))
+                    return false;
+
+                if (jv[jss::full] != true)
+                    return false;
+
+                if (jv.isMember(jss::load_fee))
+                    return false;
+
+                if (!jv.isMember(jss::signature))
+                    return false;
+
+                if (!jv.isMember(jss::signing_time))
+                    return false;
+
+                if (!jv.isMember(jss::cookie))
+                    return false;
+
+                if (!jv.isMember(jss::validated_hash))
+                    return false;
+
+                // Certain fields are only added on a flag ledger.
+                bool const isFlagLedger =
+                    (env.closed()->info().seq + 1) % 256 == 0;
+
+                if (jv.isMember(jss::server_version) != isFlagLedger)
+                    return false;
+
+                if (jv.isMember(jss::reserve_base) != isFlagLedger)
+                    return false;
+
+                if (jv.isMember(jss::reserve_inc) != isFlagLedger)
+                    return false;
+
+                return true;
+            };
+
+            // Check stream update.  Look at enough stream entries so we see
+            // at least one flag ledger.
+            while (env.closed()->info().seq < 300)
+            {
+                env.close();
+                using namespace std::chrono_literals;
+                BEAST_EXPECT(wsc->findMsg(5s, validValidationFields));
+            }
         }
 
         // RPC unsubscribe