diff --git a/src/CodeEvaluation.jl b/src/CodeEvaluation.jl
index 24dcb01..05d21fb 100644
--- a/src/CodeEvaluation.jl
+++ b/src/CodeEvaluation.jl
@@ -3,6 +3,5 @@ using IOCapture: IOCapture
 using REPL: REPL
 
 include("sandbox.jl")
-include("namedsandboxes.jl")
 
 end
diff --git a/src/namedsandboxes.jl b/src/namedsandboxes.jl
deleted file mode 100644
index 019bdc0..0000000
--- a/src/namedsandboxes.jl
+++ /dev/null
@@ -1,22 +0,0 @@
-struct NamedSandboxes
-    _pwd::String
-    _prefix::String
-    _sandboxes::Dict{Symbol,Sandbox}
-
-    function NamedSandboxes(pwd::AbstractString, prefix::AbstractString="")
-        unique_prefix = _gensym_string()
-        prefix = isempty(prefix) ? unique_prefix : string(prefix, "_", unique_prefix)
-        return new(pwd, prefix, Dict{Symbol,Sandbox}())
-    end
-end
-
-function Base.get!(s::NamedSandboxes, name::Union{AbstractString,Nothing}=nothing)
-    sym = if isnothing(name) || isempty(name)
-        Symbol("__", s._prefix, "__", _gensym_string())
-    else
-        Symbol("__", s._prefix, "__named__", name)
-    end
-    # Either fetch and return an existing sandbox from the meta dictionary (based on the generated name),
-    # or initialize a new clean one, which gets stored in meta for future re-use.
-    return get!(() -> Sandbox(sym; workingdirectory=s._pwd), s._sandboxes, sym)
-end
diff --git a/test/runtests.jl b/test/runtests.jl
index 4a6daeb..45bad09 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -46,16 +46,6 @@ using Test
         end
     end
 
-    @testset "NamedSandboxes" begin
-        sandboxes = CodeEvaluation.NamedSandboxes(@__DIR__, "testsandbox")
-        sb1 = get!(sandboxes, "foo")
-        sb2 = get!(sandboxes, "bar")
-        sb3 = get!(sandboxes, "foo")
-        @test sb1.m !== sb2.m
-        @test sb1.m === sb3.m
-        @test sb2.m !== sb3.m
-    end
-
     @testset "evaluate!" begin
         let sb = CodeEvaluation.Sandbox(:foo; workingdirectory=@__DIR__)
             write(sb, "2 + 2")
@@ -93,5 +83,32 @@ using Test
             @test r.value[] === 5
             @test r.output === "4"
         end
+
+        let sb = CodeEvaluation.Sandbox(:foo; workingdirectory=@__DIR__)
+            r = CodeEvaluation.evaluate!(sb, """error("x")""")
+            @test r isa CodeEvaluation.Result
+            @test r.sandbox === sb
+            @test r.value isa CodeEvaluation.ExceptionValue
+            @test r.value[] isa ErrorException
+            @test r.value[].msg == "x"
+            @test r.output === ""
+        end
+
+        let sb = CodeEvaluation.Sandbox(:foo; workingdirectory=@__DIR__)
+            r = CodeEvaluation.evaluate!(
+                sb,
+                """
+                print("x")
+                error("x")
+                print("y")
+                """
+            )
+            @test r isa CodeEvaluation.Result
+            @test r.sandbox === sb
+            @test r.value isa CodeEvaluation.ExceptionValue
+            @test r.value[] isa ErrorException
+            @test r.value[].msg == "x"
+            @test r.output === "x"
+        end
     end
 end