Test fix.

Author: cpfiffer

test/runtests.jl

@@ -37,7 +37,7 @@ using Random
     end
 
     @testset "psample" begin
-        chain1 = psample(model, spl1, 10000, 4)
+        chain1 = psample(model, spl1, 10000, 4; param_names=["μ", "σ"])
         @test mean(chain1["μ"].value) ≈ 0.0 atol=0.1
         @test mean(chain1["σ"].value) ≈ 1.0 atol=0.1
     end