1 files changed, 18 insertions, 0 deletions
diff --git a/tests/micropython/heapalloc_bytesio.py b/tests/micropython/heapalloc_bytesio.py
new file mode 100644
index 000000000..4aae2abf0
--- /dev/null
+++ b/tests/micropython/heapalloc_bytesio.py
@@ -0,0 +1,18 @@
+try:
+    import uio
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+import micropython
+
+data = b"1234" * 16
+buf = uio.BytesIO(64)
+
+micropython.heap_lock()
+
+buf.write(data)
+
+micropython.heap_unlock()
+
+print(buf.getvalue())