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diff --git a/tests/integration/psync2-reg.tcl b/tests/integration/psync2-reg.tcl
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+# Issue 3899 regression test.
+# We create a chain of three instances: master -> slave -> slave2
+# and continuously break the link while traffic is generated by
+# redis-benchmark. At the end we check that the data is the same
+# everywhere.
+
+start_server {tags {"psync2 external:skip"}} {
+start_server {} {
+start_server {} {
+    # Config
+    set debug_msg 0                 ; # Enable additional debug messages
+
+    set no_exit 0                   ; # Do not exit at end of the test
+
+    set duration 20                 ; # Total test seconds
+
+    for {set j 0} {$j < 3} {incr j} {
+        set R($j) [srv [expr 0-$j] client]
+        set R_host($j) [srv [expr 0-$j] host]
+        set R_port($j) [srv [expr 0-$j] port]
+        set R_unixsocket($j) [srv [expr 0-$j] unixsocket]
+        if {$debug_msg} {puts "Log file: [srv [expr 0-$j] stdout]"}
+    }
+
+    # Setup the replication and backlog parameters
+    test "PSYNC2 #3899 regression: setup" {
+        $R(1) slaveof $R_host(0) $R_port(0)
+        $R(2) slaveof $R_host(0) $R_port(0)
+        $R(0) set foo bar
+        wait_for_condition 50 1000 {
+            [status $R(1) master_link_status] == "up" &&
+            [status $R(2) master_link_status] == "up" &&
+            [$R(1) dbsize] == 1 &&
+            [$R(2) dbsize] == 1
+        } else {
+            fail "Replicas not replicating from master"
+        }
+        $R(0) config set repl-backlog-size 10mb
+        $R(1) config set repl-backlog-size 10mb
+    }
+
+    set cycle_start_time [clock milliseconds]
+    set bench_pid [exec src/redis-benchmark -s $R_unixsocket(0) -n 10000000 -r 1000 incr __rand_int__ > /dev/null &]
+    while 1 {
+        set elapsed [expr {[clock milliseconds]-$cycle_start_time}]
+        if {$elapsed > $duration*1000} break
+        if {rand() < .05} {
+            test "PSYNC2 #3899 regression: kill first replica" {
+                $R(1) client kill type master
+            }
+        }
+        if {rand() < .05} {
+            test "PSYNC2 #3899 regression: kill chained replica" {
+                $R(2) client kill type master
+            }
+        }
+        after 100
+    }
+    exec kill -9 $bench_pid
+
+    if {$debug_msg} {
+        for {set j 0} {$j < 100} {incr j} {
+            if {
+                [$R(0) debug digest] == [$R(1) debug digest] &&
+                [$R(1) debug digest] == [$R(2) debug digest]
+            } break
+            puts [$R(0) debug digest]
+            puts [$R(1) debug digest]
+            puts [$R(2) debug digest]
+            after 1000
+        }
+    }
+
+    test "PSYNC2 #3899 regression: verify consistency" {
+        wait_for_condition 50 1000 {
+            ([$R(0) debug digest] eq [$R(1) debug digest]) &&
+            ([$R(1) debug digest] eq [$R(2) debug digest])
+        } else {
+            fail "The three instances have different data sets"
+        }
+    }
+}}}