2 files changed, 16 insertions, 0 deletions
diff --git a/tests/stdlib/mintsets.nim b/tests/stdlib/mintsets.nim
new file mode 100644
index 000000000..b4d9ed516
--- /dev/null
+++ b/tests/stdlib/mintsets.nim
@@ -0,0 +1,10 @@
+import std/intsets
+
+proc test1*[]() =
+  let a = initIntSet()
+  doAssert len(a) == 0
+
+proc test2*[]() =
+  var a = initIntSet()
+  var b = initIntSet()
+  a.incl b
diff --git a/tests/stdlib/tintsets.nim b/tests/stdlib/tintsets.nim
new file mode 100644
index 000000000..191ef117e
--- /dev/null
+++ b/tests/stdlib/tintsets.nim
@@ -0,0 +1,6 @@
+import ./mintsets
+
+block: # bug https://github.com/nim-lang/Nim/pull/15564#issuecomment-729878104
+  # related to bug #11167
+  test1()
+  test2()