diff --git a/tests/ide-test.c b/tests/ide-test.c
index 33cef61e1f09b36999c9e62d0e738307c496e04e..f0280e636b5d0d62615281fbaba121a2720c0f4c 100644
--- a/tests/ide-test.c
+++ b/tests/ide-test.c
@@ -142,6 +142,10 @@ static void ide_test_start(const char *cmdline_fmt, ...)
 
 static void ide_test_quit(void)
 {
+    if (pcibus) {
+        qpci_free_pc(pcibus);
+        pcibus = NULL;
+    }
     pc_alloc_uninit(guest_malloc);
     guest_malloc = NULL;
     qtest_end();
diff --git a/tests/libqtest.c b/tests/libqtest.c
index 44ce118cfcb86f831fa6a89009903d4acabb73b0..75e07e16e7e5366fde1fab80ce3b76bfd4916c85 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -215,24 +215,28 @@ QTestState *qtest_init_without_qmp_handshake(bool use_oob,
 
     qtest_add_abrt_handler(kill_qemu_hook_func, s);
 
+    command = g_strdup_printf("exec %s "
+                              "-qtest unix:%s,nowait "
+                              "-qtest-log %s "
+                              "-chardev socket,path=%s,nowait,id=char0 "
+                              "-mon chardev=char0,mode=control%s "
+                              "-machine accel=qtest "
+                              "-display none "
+                              "%s", qemu_binary, socket_path,
+                              getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
+                              qmp_socket_path, use_oob ? ",x-oob=on" : "",
+                              extra_args ?: "");
+
+    g_test_message("starting QEMU: %s", command);
+
     s->qemu_pid = fork();
     if (s->qemu_pid == 0) {
         setenv("QEMU_AUDIO_DRV", "none", true);
-        command = g_strdup_printf("exec %s "
-                                  "-qtest unix:%s,nowait "
-                                  "-qtest-log %s "
-                                  "-chardev socket,path=%s,nowait,id=char0 "
-                                  "-mon chardev=char0,mode=control%s "
-                                  "-machine accel=qtest "
-                                  "-display none "
-                                  "%s", qemu_binary, socket_path,
-                                  getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
-                                  qmp_socket_path, use_oob ? ",x-oob=on" : "",
-                                  extra_args ?: "");
         execlp("/bin/sh", "sh", "-c", command, NULL);
         exit(1);
     }
 
+    g_free(command);
     s->fd = socket_accept(sock);
     if (s->fd >= 0) {
         s->qmp_fd = socket_accept(qmpsock);
diff --git a/tests/qmp-test.c b/tests/qmp-test.c
index 6c419f6023abdb4e29e47cf49e6d11a46c2c8c5e..7517be46544bd1dee00d6406ea491a16c2ac6a1e 100644
--- a/tests/qmp-test.c
+++ b/tests/qmp-test.c
@@ -318,6 +318,19 @@ static void test_qmp_preconfig(void)
     qtest_quit(qs);
 }
 
+static void test_qmp_missing_any_arg(void)
+{
+    QTestState *qts;
+    QDict *resp;
+
+    qts = qtest_init(common_args);
+    resp = qtest_qmp(qts, "{'execute': 'qom-set', 'arguments':"
+                     " { 'path': '/machine', 'property': 'rtc-time' } }");
+    g_assert_nonnull(resp);
+    qmp_assert_error_class(resp, "GenericError");
+    qtest_quit(qts);
+}
+
 int main(int argc, char *argv[])
 {
     g_test_init(&argc, &argv, NULL);
@@ -325,6 +338,7 @@ int main(int argc, char *argv[])
     qtest_add_func("qmp/protocol", test_qmp_protocol);
     qtest_add_func("qmp/oob", test_qmp_oob);
     qtest_add_func("qmp/preconfig", test_qmp_preconfig);
+    qtest_add_func("qmp/missing-any-arg", test_qmp_missing_any_arg);
 
     return g_test_run();
 }