diff --git a/test/interval_tests/construction.jl b/test/interval_tests/construction.jl
index 97237e5c2..848ca73e8 100644
--- a/test/interval_tests/construction.jl
+++ b/test/interval_tests/construction.jl
@@ -72,6 +72,11 @@ end
     @test_throws ArgumentError interval(-Inf, -Inf)
     @test_throws ArgumentError interval(Inf, Inf)
 
+    # Disallowed creation of interval witha a or b an interval
+    @test_throws TypeError Interval(1, 1..2)
+    @test_throws TypeError Interval(1..2, 1)
+    @test_throws TypeError Interval(1..2, 1..2)
+
     # Conversion to Interval without type
     @test convert(Interval, 1) == Interval(1.0)
     @test convert(Interval, pi) == @interval(pi)