diff --git a/t.py b/t.py
deleted file mode 100644
index 8a868a597..000000000
--- a/t.py
+++ /dev/null
@@ -1,16 +0,0 @@
-from immutables import Map
-
-def f(d):
-    with d.mutate() as mm:
-        mm.set(42, 1)
-
-    d = mm.finish()
-    # x = dict(d)
-    # x[42] = 1
-    # dict.
-
-ddd = Map({42: 8})
-
-f(ddd)
-
-print(ddd)