diff --git a/test/sectors.jl b/test/sectors.jl
index 720d1a99..a0702552 100644
--- a/test/sectors.jl
+++ b/test/sectors.jl
@@ -20,6 +20,7 @@ println("------------------------------------")
             @constinferred Fsymbol(s..., s...)
             it = @constinferred s[1] ⊗ s[2]
             @test eltype(it) === I
+            @test collect(it) isa Array{I}
             @constinferred ⊗(s..., s...)
         end
         @testset "Sector $Istr: Value iterator" begin