diff --git a/test/interval_tests/complex.jl b/test/interval_tests/complex.jl
index 6555e3d..1f67638 100644
--- a/test/interval_tests/complex.jl
+++ b/test/interval_tests/complex.jl
@@ -16,3 +16,10 @@ using ValidatedNumerics
     @test a / a == 1
     @test a^2 == -1
 end
+
+@testset "Complex functions" begin
+    Z = (3 ± 1e-7) + (4 ± 1e-7)*im
+    @test sin(Z) == Interval(3.853734949309744, 3.8537411265295507) - Interval(27.016810169394066, 27.016816346613883)*im
+
+    @test exp(-im * Interval(π)) == Interval(-1.0, -0.9999999999999999) - Interval(1.224646799147353e-16, 1.2246467991473532e-16)*im
+end