diff --git a/libuavcan_drivers/linux/apps/test_posix.cpp b/libuavcan_drivers/linux/apps/test_posix.cpp
index be432e1f36..a59aa1c3ef 100644
--- a/libuavcan_drivers/linux/apps/test_posix.cpp
+++ b/libuavcan_drivers/linux/apps/test_posix.cpp
@@ -40,6 +40,29 @@ int main(int argc, const char** argv)
             ENFORCE(0 == std::system(("cat " + event_log_file).c_str()));
         }
 
+        /*
+         * Storage backend test
+         */
+        {
+            using namespace uavcan::dynamic_node_id_server;
+
+            uavcan_posix::dynamic_node_id_server::FileStorageBackend backend;
+            ENFORCE(0 <= backend.init("/tmp/uavcan_posix/dynamic_node_id_server/storage"));
+
+            auto print_key = [&](const char* key) {
+                std::cout << static_cast<IStorageBackend&>(backend).get(key).c_str() << std::endl;
+            };
+
+            print_key("foobar");
+
+            static_cast<IStorageBackend&>(backend).set("foobar", "0123456789abcdef0123456789abcdef");
+            static_cast<IStorageBackend&>(backend).set("the_answer", "42");
+
+            print_key("foobar");
+            print_key("the_answer");
+            print_key("nonexistent");
+        }
+
         return 0;
     }
     catch (const std::exception& ex)
diff --git a/libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_storage_backend.hpp b/libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_storage_backend.hpp
index 20346e588c..e0ccf7cd3d 100644
--- a/libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_storage_backend.hpp
+++ b/libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_storage_backend.hpp
@@ -34,6 +34,8 @@ class FileStorageBackend : public uavcan::dynamic_node_id_server::IStorageBacken
      */
     enum { MaxPathLength = 128 };
 
+    enum { FilePermissions = 438 };     ///< 0o666
+
     /**
      * This type is used for the path
      */
@@ -76,7 +78,7 @@ class FileStorageBackend : public uavcan::dynamic_node_id_server::IStorageBacken
         using namespace std;
         PathString path = base_path.c_str();
         path += key;
-        int fd = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC);
+        int fd = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, FilePermissions);
         if (fd >= 0)
         {
             write(fd, value.c_str(), value.size());