diff -r 09676b559091 -r 60870dbac94f src/server/plugins/postgresql/pgtest.c
--- a/src/server/plugins/postgresql/pgtest.c	Tue Apr 26 18:21:25 2022 +0200
+++ b/src/server/plugins/postgresql/pgtest.c	Sat Apr 30 20:44:38 2022 +0200
@@ -94,6 +94,7 @@
         ucx_test_register(suite, test_pg_prepare_tests);
         ucx_test_register(suite, test_pg_webdav_propfind);
         ucx_test_register(suite, test_pg_webdav_propfind_allprop);
+        ucx_test_register(suite, test_pg_webdav_proppatch_set);
         
         PGresult *result = PQexec(test_connection, "BEGIN");
         PQclear(result);
@@ -204,6 +205,7 @@
 
 
 void test_multistatus_destroy(TestMultistatus *ms) {
+    if(!ms) return;
     xmlFreeDoc(ms->doc);
     ucx_mempool_destroy(ms->mp);
 }
@@ -481,6 +483,7 @@
     UCX_TEST_BEGIN;
     
     vfs_mkdir(vfs, "/propfind");
+    vfs_mkdir(vfs, "/proppatch");
     SYS_FILE f1;
     
     int64_t res1_id, res2_id;
@@ -506,6 +509,10 @@
     UCX_TEST_ASSERT(f1, "res4 create failed");
     vfs_close(f1);
     
+    f1 = vfs_open(vfs, "/proppatch/pp1", O_WRONLY|O_CREAT);
+    UCX_TEST_ASSERT(f1, "pp1 create failed");
+    vfs_close(f1);
+    
     // 2 properties for res1
     char idstr[32];
     snprintf(idstr, 32, "%" PRId64, res1_id);
@@ -801,3 +808,42 @@
     UCX_TEST_END;
 }
 
+UCX_TEST(test_pg_webdav_proppatch_set) {
+    Session *sn;
+    Request *rq; 
+    TestIOStream *st;
+    pblock *pb;
+    
+    UCX_TEST_BEGIN;
+    
+    // test data:
+    //
+    // /propfind/
+    // /propfind/res1     (2 properties: test, prop2)
+    // /propfind/res2     (1 property: test)
+    // /propfind/res3
+    // /propfind/sub
+    // /propfind/sub/res4
+    
+    int ret;
+    TestResponse *r1;
+    TestProperty *p;
+    // Test 1
+    init_test_webdav_method(&sn, &rq, &st, &pb, "PROPPATCH", "/proppatch/pp1", PG_TEST_PROPPATCH1);
+    rq->davCollection = create_test_pgdav(sn, rq);
+    
+    ret = webdav_proppatch(pb, sn, rq);
+    UCX_TEST_ASSERT(ret == REQ_PROCEED, "proppatch1 failed");
+    
+    printf("\n\n%.*s\n", (int)st->buf->size, st->buf->space);
+    
+    TestMultistatus *ms = test_parse_multistatus(st->buf->space, st->buf->size);
+    UCX_TEST_ASSERT(ms, "proppatch1 response is not valid xml");
+    
+    testutil_destroy_session(sn);
+    test_multistatus_destroy(ms);
+    testutil_iostream_destroy(st);
+    
+    
+    UCX_TEST_END;
+}