diff --git a/src/network/meson.build b/src/network/meson.build
index ed68faca0c..f97484eb26 100644
--- a/src/network/meson.build
+++ b/src/network/meson.build
@@ -156,6 +156,12 @@ if conf.get('ENABLE_NETWORKD') == 1
       libshared],
      [threads]],
 
+    [['src/network/test-routing-policy-rule.c'],
+     [libnetworkd_core,
+      libsystemd_network,
+      libudev],
+     []],
+
     [['src/network/test-network-tables.c',
       'src/network/test-network-tables.c',
       test_tables_h],
diff --git a/src/network/test-routing-policy-rule.c b/src/network/test-routing-policy-rule.c
new file mode 100644
index 0000000000..a4c568e325
--- /dev/null
+++ b/src/network/test-routing-policy-rule.c
@@ -0,0 +1,93 @@
+/***
+  SPDX-License-Identifier: LGPL-2.1+
+
+  This file is part of systemd.
+
+  Copyright 2017 Zbigniew Jędrzejewski-Szmek
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "fd-util.h"
+#include "fileio.h"
+#include "log.h"
+#include "macro.h"
+#include "network-internal.h"
+#include "networkd-manager.h"
+#include "string-util.h"
+
+static void test_rule_serialization(const char *title, const char *ruleset, const char *expected) {
+        char pattern[] = "/tmp/systemd-test-routing-policy-rule.XXXXXX",
+             pattern2[] = "/tmp/systemd-test-routing-policy-rule.XXXXXX",
+             pattern3[] = "/tmp/systemd-test-routing-policy-rule.XXXXXX";
+        const char *cmd;
+        int fd, fd2, fd3;
+        _cleanup_fclose_ FILE *f = NULL, *f2 = NULL, *f3 = NULL;
+        _cleanup_set_free_free_ Set *rules = NULL;
+        _cleanup_free_ char *buf = NULL;
+        size_t buf_size;
+
+        log_info("========== %s ==========", title);
+        log_info("put:\n%s\n", ruleset);
+
+        assert_se((fd = mkostemp_safe(pattern)) >= 0);
+        assert_se(f = fdopen(fd, "a+e"));
+        assert_se(write_string_stream(f, ruleset, 0) == 0);
+
+        assert_se(routing_policy_load_rules(pattern, &rules) == 0);
+
+        assert_se((fd2 = mkostemp_safe(pattern2)) >= 0);
+        assert_se(f2 = fdopen(fd2, "a+e"));
+
+        assert_se(routing_policy_serialize_rules(rules, f2) == 0);
+        assert_se(fflush_and_check(f2) == 0);
+
+        assert_se(read_full_file(pattern2, &buf, &buf_size) == 0);
+
+        log_info("got:\n%s", buf);
+
+        assert_se((fd3 = mkostemp_safe(pattern3)) >= 0);
+        assert_se(f3 = fdopen(fd3, "we"));
+        assert_se(write_string_stream(f3, expected ?: ruleset, 0) == 0);
+
+        cmd = strjoina("diff -u ", pattern3, " ", pattern2);
+        log_info("$ %s", cmd);
+        assert_se(system(cmd) == 0);
+}
+
+int main(int argc, char **argv) {
+        _cleanup_free_ char *p = NULL;
+
+        log_set_max_level(LOG_DEBUG);
+        log_parse_environment();
+        log_open();
+
+        test_rule_serialization("basic parsing",
+                                "RULE=from=1.2.3.4/32 to=2.3.4.5/32 tos=5 fwmark=1/2 table=10", NULL);
+
+        test_rule_serialization("ignored values",
+                                "RULE=something=to=ignore from=1.2.3.4/32 from=1.2.3.4/32"
+                                "   \t  to=2.3.4.5/24 to=2.3.4.5/32 tos=5 fwmark=2 fwmark=1 table=10 table=20",
+                                "RULE=from=1.2.3.4/32"
+                                " to=2.3.4.5/32 tos=5 fwmark=1/0 table=20");
+
+        test_rule_serialization("ipv6",
+                                "RULE=from=1::2/64 to=2::3/64 table=6", NULL);
+
+        assert_se(asprintf(&p, "RULE=from=1::2/64 to=2::3/64 table=%d", RT_TABLE_MAIN) >= 0);
+        test_rule_serialization("default table",
+                                "RULE=from=1::2/64 to=2::3/64", p);
+
+        return 0;
+}