diff --git a/src/parameter_indexing.jl b/src/parameter_indexing.jl
index de2d6ca..f1fac3f 100644
--- a/src/parameter_indexing.jl
+++ b/src/parameter_indexing.jl
@@ -609,7 +609,7 @@ struct MultipleSetters{S} <: AbstractSetIndexer
 end
 
 function (ms::MultipleSetters)(prob, val)
-    map((s!, v) -> s!(prob, v), ms.setters, val)
+    broadcast((s!, v) -> s!(prob, v), ms.setters, val)
 end
 
 for (t1, t2) in [
diff --git a/test/parameter_indexing_test.jl b/test/parameter_indexing_test.jl
index 5b392ab..f71a157 100644
--- a/test/parameter_indexing_test.jl
+++ b/test/parameter_indexing_test.jl
@@ -54,7 +54,8 @@ for sys in [
             ([1, [:b, :c]], [p[1], p[2:3]], [new_p[1], new_p[2:3]], false),
             ([1, (:b, :c)], [p[1], (p[2], p[3])], [new_p[1], (new_p[2], new_p[3])], false),
             ((1, [:b, :c]), (p[1], p[2:3]), (new_p[1], new_p[2:3]), true),
-            ((1, (:b, :c)), (p[1], (p[2], p[3])), (new_p[1], (new_p[2], new_p[3])), true)
+            ((1, (:b, :c)), (p[1], (p[2], p[3])), (new_p[1], (new_p[2], new_p[3])), true),
+            ([:a, :b], p[1:2], 42, true)
         ]
             get = getp(sys, sym)
             set! = setp(sys, sym)
@@ -77,13 +78,13 @@ for sys in [
             end
             @test fi.counter[] == 1
 
-            @test get(fi) == newval
+            @test all(get(fi) .== newval)
             set!(fi, oldval)
             @test get(fi) == oldval
             @test fi.counter[] == 2
 
             fi.ps[sym] = newval
-            @test get(fi) == newval
+            @test all(get(fi) .== newval)
             @test fi.counter[] == 3
             fi.ps[sym] = oldval
             @test get(fi) == oldval
@@ -98,7 +99,7 @@ for sys in [
             else
                 set!(p, newval)
             end
-            @test get(p) == newval
+            @test all(get(p) .== newval)
             set!(p, oldval)
             @test get(p) == oldval
             @test fi.counter[] == 4
@@ -150,6 +151,12 @@ end
 
 Base.getindex(mpo::MyParameterObject, i) = mpo.p[i]
 
+# check throws if setp dimensions do not match
+sys = SymbolCache([:x, :y, :z], [:a, :b, :c, :d], [:t])
+fi = FakeIntegrator(sys, [1.0, 2.0, 3.0], 0.0, Ref(0))
+@test_throws DimensionMismatch setp(fi, 1:2)(fi, [-1.0, -2.0, -3.0])
+@test_throws DimensionMismatch setp(fi, 1:3)(fi, [-1.0, -2.0])
+
 struct FakeSolution
     sys::SymbolCache
     u::Vector{Vector{Float64}}