diff --git a/deps/sefs b/deps/sefs
index 1be96ad3..e0cf9c10 160000
--- a/deps/sefs
+++ b/deps/sefs
@@ -1 +1 @@
-Subproject commit 1be96ad39575361037b456f4e5c1eb7b4fbfacec
+Subproject commit e0cf9c102875e9589ac862766cb8a17f94bfbee4
diff --git a/test/file/main.c b/test/file/main.c
index 165c8d4b..21d9a5b2 100644
--- a/test/file/main.c
+++ b/test/file/main.c
@@ -23,6 +23,12 @@ int main(int argc, const char* argv[]) {
         printf("ERROR: failed to write to the file\n");
         return -1;
     }
+
+    // lseek
+	if ((offset = lseek(fd, 0, SEEK_END)) != 12) {
+		printf("ERROR: failed to lseek the file\n");
+		return -1;
+	}
     close(fd);
 
     // read