diff --git a/io-test/mkdir.c b/io-test/mkdir.c
new file mode 100644
index 0000000..ea43964
--- /dev/null
+++ b/io-test/mkdir.c
@@ -0,0 +1,21 @@
+#include <blue/io/directory.h>
+
+int main(int argc, const char **argv)
+{
+	if (argc < 2) {
+		return -1;
+	}
+
+	const char *path = argv[1];
+
+	b_directory *dir;
+	b_result result = b_directory_open(
+		NULL, B_RV_PATH(path), B_DIRECTORY_OPEN_CREATE_INTERMEDIATE, &dir);
+	if (b_result_is_error(result)) {
+		b_throw(result);
+		return -1;
+	}
+
+	b_directory_release(dir);
+	return 0;
+}
diff --git a/io-test/streams.c b/io-test/streams.c
index ab904b5..019a570 100644
--- a/io-test/streams.c
+++ b/io-test/streams.c
@@ -7,18 +7,17 @@ int main(int argc, const char **argv)
 {
 	b_file *dest;
 	b_path *path = b_path_create_from_cstr("data.txt");
-	b_status status = b_file_open(
+	b_result result = b_file_open(
 		NULL, path, B_FILE_WRITE_ONLY | B_FILE_CREATE, &dest);
-	if (!B_OK(status)) {
-		fprintf(stderr, "cannot open file (%s)\n",
-		        b_status_to_string(status));
+	if (b_result_is_error(result)) {
+		b_throw(result);
 		return -1;
 	}
 
 	size_t nr_read = 0;
 	b_stream *dest_stream;
 	b_stream_pipeline *pipeline;
-	status = b_file_open_stream(dest, &dest_stream);
+	b_status status = b_file_open_stream(dest, &dest_stream);
 	b_stream_pipeline_create(1024, &pipeline);
 	b_stream_read_all_bytes_s(b_stdin, dest_stream, pipeline, &nr_read);
 
diff --git a/io-test/tree.c b/io-test/tree.c
index 717faad..d1c7ee1 100644
--- a/io-test/tree.c
+++ b/io-test/tree.c
@@ -13,11 +13,10 @@ int main(int argc, const char **argv)
 
 	b_directory *dir = NULL;
 	b_path *path = b_path_create_from_cstr(argv[1]);
-	b_status status = b_directory_open(B_DIRECTORY_ROOT, path, &dir);
+	b_result result = b_directory_open(B_DIRECTORY_ROOT, path, 0, &dir);
 
-	if (!B_OK(status)) {
-		printf("cannot open %s\n", b_path_ptr(path));
-		printf("%s\n", b_status_to_string(status));
+	if (b_result_is_error(result)) {
+		b_throw(result);
 		return -1;
 	}