diff --git a/dev/uninterruptible.c b/dev/uninterruptible.c
new file mode 100644
index 0000000..69aa15b
--- /dev/null
+++ b/dev/uninterruptible.c
@@ -0,0 +1,9 @@
+# Create a process in uninterruptible sleep state that forks a child process.
+# Killing child process will change childs's state to zombie.
+# Useful for WaitforTaskCompletion tests
+
+int main() {
+    vfork();
+    sleep(180);
+    return 0;
+}