diff --git a/unittests/map_count.chai b/unittests/map_count.chai
new file mode 100644
index 0000000..cf74e74
--- /dev/null
+++ b/unittests/map_count.chai
@@ -0,0 +1,5 @@
+
+assert_equal(1, ["a":1].count("a"))
+assert_equal(0, ["A":1].count("a"))
+
+