diff --git a/src/messenger.cpp b/src/messenger.cpp
index d978f91e..5578a368 100644
--- a/src/messenger.cpp
+++ b/src/messenger.cpp
@@ -525,7 +525,8 @@ json11::Json osd_messenger_t::read_config(const json11::Json & config)
     int fd = open(config_path, O_RDONLY);
     if (fd < 0)
     {
-        fprintf(stderr, "Error reading %s: %s\n", config_path, strerror(errno));
+        if (errno != ENOENT)
+            fprintf(stderr, "Error reading %s: %s\n", config_path, strerror(errno));
         return config;
     }
     struct stat st;
diff --git a/src/osd.cpp b/src/osd.cpp
index f61d8072..7998c88c 100644
--- a/src/osd.cpp
+++ b/src/osd.cpp
@@ -112,6 +112,8 @@ void osd_t::parse_config(const json11::Json & config)
         immediate_commit = IMMEDIATE_ALL;
     else if (config["immediate_commit"] == "small")
         immediate_commit = IMMEDIATE_SMALL;
+    else
+        immediate_commit = IMMEDIATE_NONE;
     if (!config["autosync_interval"].is_null())
     {
         // Allow to set it to 0
diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index 93f23e17..07944878 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -199,9 +199,9 @@ static int vitastor_file_open(BlockDriverState *bs, QDict *options, int flags, E
     client->etcd_host = g_strdup(qdict_get_try_str(options, "etcd_host"));
     client->etcd_prefix = g_strdup(qdict_get_try_str(options, "etcd_prefix"));
     client->rdma_device = g_strdup(qdict_get_try_str(options, "rdma_device"));
-    client->rdma_port_num = qdict_get_int(options, "rdma_port_num");
-    client->rdma_gid_index = qdict_get_int(options, "rdma_gid_index");
-    client->rdma_mtu = qdict_get_int(options, "rdma_mtu");
+    client->rdma_port_num = qdict_get_try_int(options, "rdma_port_num", 0);
+    client->rdma_gid_index = qdict_get_try_int(options, "rdma_gid_index", 0);
+    client->rdma_mtu = qdict_get_try_int(options, "rdma_mtu", 0);
     client->proxy = vitastor_proxy_create(
         bdrv_get_aio_context(bs), client->config_path, client->etcd_host, client->etcd_prefix,
         client->rdma_device, client->rdma_port_num, client->rdma_gid_index, client->rdma_mtu
diff --git a/tests/test_vm_start.sh b/tests/test_vm_start.sh
index bdcdf29c..f2b1f3e2 100755
--- a/tests/test_vm_start.sh
+++ b/tests/test_vm_start.sh
@@ -46,7 +46,7 @@ $ETCDCTL put /vitastor/config/inode/1/1 '{"name":"debian9@0","size":'$((2048*102
 $ETCDCTL put /vitastor/config/inode/1/2 '{"parent_id":1,"name":"debian9","size":'$((2048*1024*1024))'}'
 
 qemu-system-x86_64 -enable-kvm -m 1024 \
-    -drive 'file=vitastor:etcd_host=127.0.0.1\:$ETCD_PORT/v3:image=debian9',format=raw,if=none,id=drive-virtio-disk0,cache=none \
+    -drive 'file=vitastor:etcd_host=127.0.0.1\:'$ETCD_PORT'/v3:image=debian9',format=raw,if=none,id=drive-virtio-disk0,cache=none \
     -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=off,physical_block_size=4096,logical_block_size=512 \
     -vnc 0.0.0.0:0