diff --git a/tests/misc/tconv.nim b/tests/misc/tconv.nim
index 2384c3e9d7..f7d15b0b57 100644
--- a/tests/misc/tconv.nim
+++ b/tests/misc/tconv.nim
@@ -41,3 +41,17 @@ type E = enum a, b, c
 
 reject:
     const e = E(4)
+
+block: # issue 3766
+
+  type R = range[0..2]
+
+  reject:
+    type
+      T[n: static[R]] = object
+      V = T[3.R]
+
+  reject:
+    proc r(x: static[R]) =
+      echo x
+    r 3.R