diff --git a/test/dates/io.jl b/test/dates/io.jl
index 11aea94137a1b..bdcade050c16f 100644
--- a/test/dates/io.jl
+++ b/test/dates/io.jl
@@ -359,3 +359,8 @@ let
     @test DateTime(ds, format) == dt
     @test DateTime(ds, escaped_format) == dt
 end
+
+# Issue 10817
+@test Dates.Date("Apr 01 2014", "uuu dd yyyy") == Dates.Date(2014,4,1)
+@test_throws ArgumentError Dates.Date("Apr 01 xx 2014", "uuu dd zz yyyy")
+@test_throws ArgumentError Dates.Date("Apr 01 xx 2014", "uuu dd    yyyy")