diff --git a/test/test_classes.jl b/test/test_classes.jl
index 2d5a116..e752467 100644
--- a/test/test_classes.jl
+++ b/test/test_classes.jl
@@ -6,6 +6,11 @@ using Classes
 @test isclass(AbstractClass) == false       # not concrete
 @test isclass(Int) == false                 # not <: AbstractClass
 
+"""
+  Foo
+
+A test class
+"""
 @class Foo begin
    foo::Int
 
@@ -20,6 +25,10 @@ end
 
 @test classof(AbstractFoo) == Foo
 @test classof(Foo) == Foo
+@test string(@doc(Foo)) == """Foo
+
+A test class
+"""
 
 @test superclass(Foo) == Class
 @test_throws Exception superclass(AbstractFoo)
@@ -157,4 +166,4 @@ obj = AbstractLog{Float64}([1. 2.; 3. 4.])
 # function (ParameterizedSub{T3, T4}(one::T1, two::T2, x::Float64, y::Float64; )::Any) where {T3 <: TupleHolder, T4 <: TupleHolder}
 #     #= /Users/rjp/.julia/packages/MacroTools/4AjBS/src/utils.jl:302 =#
 #     new{T3, T4}(one, two, x, y)
-# end
\ No newline at end of file
+# end