diff --git a/test/test_structarrays.jl b/test/test_structarrays.jl
index 5b7b9298..5292c145 100644
--- a/test/test_structarrays.jl
+++ b/test/test_structarrays.jl
@@ -26,4 +26,8 @@ end
     @test_broken eltype(ys) == ComplexF64
 end
 
+@testset "type inference" begin
+    @test (@inferred singletonof(StructVector, (a=1,))) == StructVector((a=[1]))
+end
+
 end  # module