diff --git a/artiq/test/lit/integration/array.py b/artiq/test/lit/integration/array.py
index c85ebaac1..d8e8ab15c 100644
--- a/artiq/test/lit/integration/array.py
+++ b/artiq/test/lit/integration/array.py
@@ -6,5 +6,10 @@ assert len(ary) == 3
 # FIXME: Implement ndarray indexing
 # assert [x*x for x in ary] == [1, 4, 9]
 
+# Reassign to an existing value to disambiguate type of empty array.
+empty_array = array([1])
+empty_array = array([])
+assert len(empty_array) == 0
+
 matrix = array([[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]])
 assert len(matrix) == 2