diff --git a/testdefs.sh b/testdefs.sh
index 71bfdf0d..05865590 100644
--- a/testdefs.sh
+++ b/testdefs.sh
@@ -22,6 +22,7 @@ servald_source_root="${testdefs_sh%/*}"
 servald_build_root="$servald_source_root"
 servald_build_executable="$servald_build_root/servald"
 export TFW_LOGDIR="${TFW_LOGDIR:-$servald_build_root/testlog}"
+addr_localhost="127.0.0.1"
 
 declare -a instance_stack=()
 
@@ -445,7 +446,7 @@ configure_servald_server() {
 # Utility function:
 #  - start a set of servald server processes running on a shared dummy interface
 #    and with its own private monitor and MDP abstract socket names
-#  - set variable DUMMYNET to the full path name of shared dummy interface
+#  - set variables DUMMYx to the full path name of shared dummy interface
 #  - set variables SIDx to the SID of instance x: SIDA, SIDB, etc.
 #  - set variables DIDx to the DID of instance x: DIDA, DIDB, etc.
 #  - set variables NAMEx to the names of instance x: NAMEA, NAMEB, etc.
@@ -454,9 +455,13 @@ configure_servald_server() {
 #  - wait for all instances to detect each other
 #  - assert that all instances are in each others' peer lists
 start_servald_instances() {
+   local DUMMY=dummy
+   case "$1" in
+   dummy*) DUMMY="$1"; shift;;
+   esac
    push_instance
-   tfw_log "# start servald instances $*"
-   DUMMYNET=$SERVALD_VAR/dummy
+   tfw_log "# start servald instances DUMMY=$DUMMY $*"
+   local DUMMYNET="$SERVALD_VAR/$DUMMY"
    >$DUMMYNET
    local I J
    for I; do
@@ -467,6 +472,7 @@ start_servald_instances() {
       executeOk_servald config set mdp.socket "org.servalproject.servald.mdp.socket.$TFWUNIQUE.$instance_name"
       configure_servald_server
       start_servald_server
+      eval DUMMY$instance_name="$DUMMYNET"
       eval SID$instance_name="$SID"
       eval DID$instance_name="$(shellarg "$DID")"
       eval NAME$instance_name="$(shellarg "$NAME")"
@@ -503,3 +509,20 @@ instances_see_each_other() {
    done
    return 0
 }
+
+rhizome_http_server_started() {
+   local logvar=LOG${1#+}
+   grep 'RHIZOME HTTP SERVER,.*START.*port=[0-9]' "${!logvar}"
+}
+
+get_rhizome_server_port() {
+   local _var="$1"
+   local _logvar=LOG${2#+}
+   local _port=$(sed -n -e '/.*RHIZOME HTTP SERVER.*START/{s/.*port=\([0-9]\{1,\}\).*/\1/p;q}' "${!_logvar}")
+   assert --message="instance $2 Rhizome HTTP server port number is known" [ -n "$_port" ]
+   if [ -n "$_var" ]; then
+      eval "$_var=\$_port"
+      tfw_log "$_var=$_port"
+   fi
+   return 0
+}
diff --git a/tests/rhizomeprotocol b/tests/rhizomeprotocol
index 6a37c334..eb80fe3f 100755
--- a/tests/rhizomeprotocol
+++ b/tests/rhizomeprotocol
@@ -51,15 +51,25 @@ configure_servald_server() {
 }
 
 # Predicate function:
-#  - return true if the file bundle identified by $BID and $VERSION has been
+#  - return true if the file bundle identified by arg1=BID and arg2=VERSION has been
 #    received by all the given instances
 #  - does this by examining the server log files of the respective instances
 #    for tell-tale INFO messages
 bundle_received_by() {
+   local BID="$1"
+   local VERSION="$2"
+   shift 2
    local I
    for I; do
-      logvar="LOG${I#+}"
-      grep "RHIZOME ADD MANIFEST service=file bid=$BID version=$VERSION" "${!logvar}" || return 1
+      case "$I" in
+      +*)
+         logvar="LOG${I#+}"
+         grep "RHIZOME ADD MANIFEST service=file bid=$BID version=$VERSION" "${!logvar}" || return 1
+         ;;
+      *)
+         error "invalid instance argument: $I"
+         ;;
+      esac
    done
    return 0
 }
@@ -112,13 +122,13 @@ setup_FileTransfer() {
    start_servald_instances +A +B
 }
 test_FileTransfer() {
-   wait_until bundle_received_by +B
+   wait_until bundle_received_by $BID $VERSION +B
    set_instance +B
    assert_received file1
    set_instance +A
    update_file file1 file2
    set_instance +B
-   wait_until bundle_received_by +B
+   wait_until bundle_received_by $BID $VERSION +B
    assert_received file2
 }
 
@@ -133,7 +143,7 @@ setup_FileTransferBig() {
    start_servald_instances +A +B
 }
 test_FileTransferBig() {
-   wait_until bundle_received_by +B
+   wait_until bundle_received_by $BID $VERSION +B
    set_instance +B
    assert_received file1
 }
@@ -158,7 +168,7 @@ setup_FileTransferMulti() {
    start_servald_instances +A +B +C +D +E
 }
 test_FileTransferMulti() {
-   wait_until bundle_received_by +B +C +D +E
+   wait_until bundle_received_by $BID $VERSION +B +C +D +E
    local I
    for I in +B +C +D +E; do
       set_instance $I
@@ -172,15 +182,73 @@ setup_FileTransferDelete() {
    set_instance +A
    add_file file1
    start_servald_instances +A +B
-   wait_until bundle_received_by +B
+   wait_until bundle_received_by $BID $VERSION +B
    set_instance +A
    >file1_2
    update_file file1 file1_2
 }
 test_FileTransferDelete() {
-   wait_until bundle_received_by +B
+   wait_until bundle_received_by $BID $VERSION +B
    set_instance +B
    assert_received file1_2
 }
 
+setup_sync() {
+   set_instance +A
+   add_file file1
+   BID1=$BID
+   VERSION1=$VERSION
+   start_servald_instances dummy1 +A
+   wait_until rhizome_http_server_started +A
+   get_rhizome_server_port PORTA +A
+   set_instance +B
+   add_file file2
+   BID2=$BID
+   VERSION2=$VERSION
+   executeOk_servald config set rhizome.direct.address "$addr_localhost"
+   executeOk_servald config set rhizome.direct.port "$PORTA"
+   start_servald_instances dummy2 +B
+}
+
+doc_Push="One way push bundle to unconnected node"
+setup_Push() {
+   setup_common
+   setup_sync
+}
+test_Push() {
+   executeOk_servald rhizome push
+   assert bundle_received_by $BID1 $VERSION1 +B
+   assert ! bundle_received_by $BID2 $VERSION2 +A
+   set_instance +B
+   assert_received file1
+}
+
+doc_Pull="One way pull bundle from unconnected node"
+setup_Pull() {
+   setup_common
+   setup_sync
+}
+test_Pull() {
+   executeOk_servald rhizome pull
+   assert bundle_received_by $BID2 $VERSION2 +A
+   assert ! bundle_received_by $BID1 $VERSION1 +B
+   set_instance +A
+   assert_received file2
+}
+
+doc_Sync="Two-way sync bundles between unconnected nodes"
+setup_Sync() {
+   setup_common
+   setup_sync
+}
+test_Sync() {
+   executeOk_servald rhizome sync
+   assert bundle_received_by $BID2 $VERSION2 +A
+   assert bundle_received_by $BID1 $VERSION1 +B
+   set_instance +A
+   assert_received file2
+   set_instance +B
+   assert_received file1
+}
+
 runTests "$@"