diff --git a/test/pdmtypes.jl b/test/pdmtypes.jl
index 03941db..62324a2 100644
--- a/test/pdmtypes.jl
+++ b/test/pdmtypes.jl
@@ -185,7 +185,7 @@ using Test
         M = @inferred AbstractPDMat(Diagonal(A))
         @test M isa PDiagMat
         @test Matrix(M) ≈ Diagonal(A)
-        Mat32 = Matrix{Float32}(M)
+        Mat32 = @inferred Matrix{Float32}(M)
         @test eltype(Mat32) == Float32
         @test Mat32 ≈ Float32.(Diagonal(A))